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  • 201.
    Fridberg, Marie
    et al.
    Högskolan Kristianstad, Forskningsmiljön Learning in Science and Mathematics (LISMA). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Thulin, Susanne
    Högskolan Kristianstad, Forskningsmiljön Learning in Science and Mathematics (LISMA). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Pedagogik. Högskolan Kristianstad, Forskningsmiljön Barndom, Lärande och Utbildning (BALU).
    Redfors, Andreas
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Learning in Science and Mathematics (LISMA).
    Preschool children’s collaborative science learning scaffolded by tablets: a teachers view2017Konferensbidrag (Övrigt vetenskapligt)
  • 202. Gillman, Anna
    et al.
    Muradrasoli, Shaman
    Söderström, Hanna
    Holmberg, Fredrik
    Latorre-Margalef, Neus
    Tolf, Conny
    Waldenström, Jonas
    Gunnarsson, Gunnar
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Olsen, Björn
    Järhult, Josef D
    Oseltamivir-Resistant Influenza A (H1N1) Virus Strain with an H274Y Mutation in Neuraminidase Persists without Drug Pressure in Infected Mallards2015Ingår i: Applied and Environmental Microbiology, ISSN 0099-2240, E-ISSN 1098-5336, Vol. 81, nr 7, s. 2378-2383Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Influenza A virus (IAV) has its natural reservoir in wild waterfowl and emerging human IAVs often contain gene segments from avian viruses. The active drug metabolite of oseltamivir (oseltamivir carboxylate (OC)), stockpiled as Tamiflu® for influenza pandemic preparedness, is not removed by conventional sewage treatment and has been detected in river water. There, it may there exert evolutionary pressure on avian IAV in waterfowl, resulting in development of resistant viral variants. A resistant avian IAV can circulate among wild birds only if resistance does not restrict viral fitness and if the resistant virus can persist without continuous drug pressure. In this in vivo Mallard (Anas platyrhynchos) study we tested if an OC-resistant avian IAV strain (A(H1N1)/NA-H274Y) could retain resistance while drug pressure was gradually removed. Successively infected Mallards were exposed to decreasing levels of OC, and fecal samples were analyzed for neuraminidase sequence and phenotypic resistance. No reversion to wild-type virus was observed during the experiment, which included 17 days of viral transmission in 10 ducks exposed to OC concentrations below resistance induction levels. We conclude that resistance in avian IAV, induced by OC exposure of the natural host, can persist in absence of the drug. Thus, there is a risk that human pathogenic IAVs that evolve from IAVs circulating among wild birds may contain resistance mutations. An oseltamivir resistant pandemic IAV would be a substantial public health threat. Therefore, our observations underscore the need for prudent oseltamivir use, upgraded sewage treatment and resistance surveillance of IAV in wild birds.

  • 203. Godhe, A.
    et al.
    Rehnstam-Holm, Ann-Sofi
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Musselgifternas förekomst regleras av oceanografiska förhållanden2002Ingår i: Havsmiljön: aktuell rapport om miljötillståndet i Kattegat, Skagerrak och Öresund. Juni 2002, Göteborg: Göteborgs universitets marina forskningscentrum , 2002Kapitel i bok, del av antologi (Övrigt vetenskapligt)
  • 204.
    Godhe, Anna
    et al.
    Department of Marine Ecology, Marine Botany, Göteborg University.
    McQuoid, Melissa R.
    Department of Marine Ecology, Marine Botany, Göteborg University.
    Karunasagar, Indrana
    Department of Fishery Microbiology, College of Fisheries, University of Agricultural Sciences, Mangalore.
    Karunasagar, Iddya
    Department of Fishery Microbiology, College of Fisheries, University of Agricultural Sciences, Mangalore.
    Rehnstam-Holm, Ann-Sofi
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Comparison of three common molecular tools for distinguishing among geographically separated clones of the diatom Skeletonema marinoi Sarno et Zingone (bacillariophyceae)2006Ingår i: Journal of Phycology, ISSN 0022-3646, E-ISSN 1529-8817, Vol. 42, nr 2, s. 280-291Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Skeletonema marinoi Sarno et Zingone is a planktonic marine diatom with a widespread geographic distribution. Different populations of this species may show distinct genetic signatures. We have evaluated the utility of three common molecular methods for distinguishing clones of S. marinoi from different geographic regions. Clonal cultures were isolated from the Canadian west coast, south west Portugal, and the east and west coasts of Sweden. All strains originated from resting stages in sediment. More than 90% of the individually isolated chains grew to densities suitable for DNA extraction. Genetic signatures of clones from each sample location were assessed by sequencing variable domains (D1-D3) of the nuclear large subunit (LSU) rRNA gene and internal transcriber spacer (ITS) (ITS-1, 5.8S and ITS-2) regions, and also by analysis of randomly amplified polymorphic DNA patterns. Analysis of molecular variance showed that strains from the four geographic areas were significantly separated by all three methods but that differences among European samples were best resolved by ITS 2 sequences.

  • 205.
    Godhe, Anna
    et al.
    Department of Fishery Microbiology, College of Fisheries, University of Agricultural Sciences, Mangalore.
    Rehnstam-Holm, Ann-Sofi
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Karunasagar, Indrani
    Department of Fishery Microbiology, College of Fisheries, University of Agricultural Sciences, Mangalore.
    Karunasagar, Iddya
    Department of Fishery Microbiology, College of Fisheries, University of Agricultural Sciences, Mangalore.
    PCR detection of dinoflagellate cysts in field sediment samples from tropic and temperate environments2002Ingår i: Harmful Algae, ISSN 1568-9883, E-ISSN 1878-1470, Vol. 1, nr 4, s. 361-373Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Species-specific primers were constructed for Scrippsiella trochoidea, Protoceratium reticulatum and Lingulodinium polyedrum, which all are common cosmopolitan cyst forming dinoflagellates. The designed primers amplified a product of expected size from cultured planktonic cells of the three species, and did not yield any product with a wide range of other algal species used as negative controls. The PCR method for detection and identification of dinoflagellate cysts from the three species was applied on field samples. Undisturbed surface sediment was collected along the southwest coast of India and the west coast of Sweden. DNA extract from sediment including DNA from dinoflagellate cysts could be obtained after repeated grinding with mortar and pestle under liquid nitrogen followed by microwave boiling. All sediment samples that contained any of the target species as confirmed by microscopy, were also positive for PCR. Field samples negative for any of the target species by microscopy, were also negative by PCR. Restriction enzyme digestion and/or DNA sequencing confirmed the specificity of all the PCR products from field samples. The yield of DNA from sediment extraction was low, and therefore nested PCR was necessary for accurate species-specific detection of the three species in most of the field samples.

  • 206.
    Golas, Marta
    et al.
    Polen.
    Czernekova, Michaela
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Charles University, Prague.
    Hyra, Marta
    Polen.
    Janelt, Kamil
    Polen.
    Poprawa, Izabela
    Polen.
    Organisation of the capsule of Macrobiotus pallari and Richtersius coronifer (Tardigrada, Eutardigrada, Parachela)2016Ingår i: ACTA BIOLOGICA CRACOVIENSIA, 2016, Vol. 58, s. 74-Konferensbidrag (Refereegranskat)
    Abstract [en]

    Organisation of the egg capsule of two species of tardigrades belonging to the family Macrobiotidae, Macrobiotus pallari and Richtersius coronifer, was analysed using light, transmission and scanning electron microscopy. In both cases, similar to other Macrobiotidae (Węglarska, 1982; Poprawa etal., 2015) egg capsule was composed of thin vitelline envelope and three-layered chorion. The chorion consisted of: (1) the inner, medium electron-dense layer – endochorion, (2) the middle, labyrinthine layer and (3) the outer, medium electron-dense layer – exochorion. The yellow chorion of Richtersius coronifer was covered with elongated processes having irregular granulation ontheir surface. These processes were empty inside. They were formed by evagination of exochorion. The basic chorion connecting processes was smooth and covered with irregular granulation. The chorion of Macrobiotus pallari was white. Its surface was covered with conical processes and areolation between them. The tips of processes were elongated and formed bushy structure. The surface of conical processes has a form of sculpture composed of thin rings. The processes that were empty inside, were formed by evagination of exochorion and labyrinthine layer.

  • 207.
    Granklint Enochson, Pernilla
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Students' understanding of the functioning of the human body in relation to their own health2008Konferensbidrag (Refereegranskat)
  • 208.
    Granklint Enochson, Pernilla
    et al.
    Linnéuniversitetet.
    Redfors, Andreas
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Learning in Science and Mathematics (LISMA).
    Dempster, Edith R.
    Sydafrika.
    Tibell, Lena
    Linköpings universitet.
    Ideas about the human body among secondary students in South Africa2015Ingår i: African Journal of Research in Mathematics, Science and Technology Education, ISSN 1028-8457, Vol. 19, nr 2, s. 199-211Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this paper we focus on how South African students’ ideas about the human body are constituted in their descriptions of three different scenarios involving the pathway of a sandwich, a painkiller and a glass of water through the body. In particular, we have studied the way in which the students transferred ideas between the sandwich and the painkiller compared with the students’ ability to explain the water pathway. The study surveyed 161 ninth-grade students in five different schools in South Africa. Data collection methods used were: drawings, written questions (open-ended items) and interviews with selected students. The questions emerged from the three scenarios — what happens in the body when you eat a sandwich, swallow a painkiller and drink a glass of water. We report that it is difficult for the students to transfer knowledge of the digestive system horizontally from the sandwich scenario to descriptions of the painkiller and water scenarios. The integration of three organ systems (digestive, circulatory and excretory) to describe the water scenario was even more difficult for the students than the horizontal transfer from the sandwich scenario. The students also showed a diversity of non-scientific descriptions, especially concerning the water scenario. The paper discusses why a large percentage of the students (∼50%) included non-scientific ideas in their descriptions of the water scenario.

  • 209.
    Granklint Enochson, Pernilla
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Learning in Science and Mathematics (LISMA).
    Redfors, Andreas
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Learning in Science and Mathematics (LISMA).
    Tibell, L.
    Linköpings universitet, Tekniska högskolan.
    Dempster, E.
    University of KwaZulu-Natal, South Africa.
    Similarities and differences in students' ideas about the human body and health in South Africa and SwedenManuskript (preprint) (Övrigt vetenskapligt)
    Abstract [en]

    In both Sweden and South Africa, the science curriculum for the secondary level emphasizes learning about the functioning of the human body. Both curricula also emphasize the importance of living a healthy life. In this paper the focus is on how students’ ideas about the human body are constituted in explanations of three different scenarios, and in what way the students are transferring explanations between these scenarios. The study surveyed 161 9th grade students in five different schools in South Africa, and discusses the results in perspective of a previous study involving 88 students in Sweden. In both countries issues about body and health are discussed in several different subjects in school. The same data collection methods were used in both countries: drawings, written questions (open-ended and multiple-choice items), and interviews with selected students. The questions emerge from three scenarios: what happens in the body when you eat an open sandwich, drink water, and swallow a painkiller. We report that it is difficult for the students to horizontally transfer knowledge of the digestive system to other less well-known scenarios. In comparing the use of three systems in the painkiller-scenario to the horizontal transfer between the sandwichand the painkiller-scenarios we see that the difference is much less pronounced in South African results compared to the Swedish study. There are more similarities than differences between the results of this South Africa study and results obtained in Europe, but there are also differences especially with regard to non-scientific ideas about the human body.

  • 210.
    Green, Andy J.
    et al.
    Estación Biológica de Doñana, CSIC, Sevilla.
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Ecosystem services provided by waterbirds2014Ingår i: Biological Reviews, ISSN 1464-7931, E-ISSN 1469-185X, Vol. 89, nr 1, s. 105-122Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Ecosystem services are ecosystem processes that directly or indirectly benefit human well-being. There has been much recent literature identifying different services and the communities and species that provide them. This is a vital first step towards management and maintenance of these services. In this review, we specifically address the waterbirds, which play key functional roles in many aquatic ecosystems, including as predators, herbivores and vectors of seeds, invertebrates and nutrients, although these roles have often been overlooked. Waterbirds can maintain the diversity of other organisms, control pests, be effective bioindicators of ecological conditions, and act as sentinels of potential disease outbreaks. They also provide important provisioning (meat, feathers, eggs, etc.) and cultural services to both indigenous and westernized societies. We identify key gaps in the understanding of ecosystem services provided by waterbirds and areas for future research required to clarify their functional role in ecosystems and the services they provide. We consider how the economic value of these services could be calculated, giving some examples. Such valuation will provide powerful arguments for waterbird conservation.

  • 211.
    Green, Jenny
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Learning in Science and Mathematics (LISMA).
    Juter, Kristina
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Learning in Science and Mathematics (LISMA).
    Jönsson, Anders
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Learning in Science and Mathematics (LISMA).
    Ottosson, Torgny
    Högskolan Kristianstad, Forskningsmiljön Learning in Science and Mathematics (LISMA). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Pedagogik.
    Formative mathematics assessment in upper secondary school2014Ingår i: Proceedings of the 38 th Conference of the International Group for the Psychology of           Mathematics Education in Vancouver, Canada 2014 / [ed] P. Liljedahl, C Nicol, S. Oesterle & D. Allan, 2014, Vol. 6, s. 312-312Konferensbidrag (Övrigt vetenskapligt)
  • 212. Grettve, Anna
    et al.
    Israelsson, Marie
    Jönsson, Anders
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Learning in Science and Mathematics (LISMA).
    Att bedöma och sätta betyg: tio utmaningar i lärarens vardag2014Bok (Övrig (populärvetenskap, debatt, mm))
    Abstract [sv]

    Att bedöma och sätta betyg är en av lärarens viktigaste och svåraste uppgifter och i det arbetet uppstår frågor. Författarna diskuterar dessa utifrån tio konkreta utmaningar i lärarens bedömningsvardag. Exempel på detta är hur man kan samla in ett allsidigt bedömningsunderlag, ge effektiv återkoppling, använda själv- och kamratbedömning och ta ställning i frågor om digitalt dokumentationsstöd.

    Boken belyser hur samverkan mellan praktisk erfarenhet, skolans styrdokument och aktuell forskning kan stärka professionen. Ambitionen är också att visa det som inte låter sig fångas i entydiga riktlinjer från myndigheter eller i forskning. Den enskilda läraren har, trots allt, ett stort handlingsutrymme i sin yrkesutövning.

    Att bedöma och sätta betyg. Tio utmaningar i lärarens vardag riktar sig både till lärarstuderande och verksamma lärare inom grund- och gymnasieskola. Boken kan användas som diskussions- och reflektionsunderlag och i arbete med bedömning och betygssättning.

  • 213.
    Grevholm, Barbro
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Learning in Science and Mathematics (LISMA).
    Mathematical moments in a human life: narratives on transformation2014Ingår i: Transformation: a fundamental idea of mathematics education / [ed] Sebastian Rezat, Mathias Hattermann, Andrea Peter-Koop, New York: Springer-Verlag New York, 2014, s. 107-125Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    The purpose of the chapter is to use narratives in order to illustrate the characteristics of the human perception of mathematics. The transformation over time of views of mathematics will be enlightened by the changing perceptions of the individual. The many varied faces of mathematics will offer images of the multiple ways and situations in which mathematics plays an important role in society and culture. Mathematics education research will supply the basis for interpretation of the narratives and the transformations of mathematics.

  • 214.
    Grönroos, Johanna
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH).
    Strandberg, Roine
    Lunds universitet.
    Olofsson, Patrik
    Alerstam, Thomas
    Lunds universitet.
    Klaassen, Raymond
    Skånska tärnors flyttning - ett forskningsprojekt2016Ingår i: Anser, ISSN 0347-9595, nr 1, s. 20-26Artikel i tidskrift (Övrig (populärvetenskap, debatt, mm))
  • 215.
    Guidetti, Roberto
    et al.
    Italien.
    Jönsson, K Ingemar
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Møbjerg Kristensen, Reinhardt
    Danmark.
    Tardigrades of Sweden: an updated check-list2015Ingår i: Zootaxa, ISSN 1175-5326, E-ISSN 1175-5334, Vol. 3981, nr 4, s. 491-507Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Tardigrades occur worldwide and in a variety of ecosystems and habitats representing an important component of the micrometazoan biodiversity. Several studies documenting the occurrence of tardigrades in Sweden have been published since the first reports in early 1900, but no comprehensive summary of these studies have been published. We compiled the available information on recorded tardigrades from Sweden, using material from published studies and museum and university collections. In total, our review document 101 species of tardigrades that have been recorded from Sweden (an updated checklist of tardigrades from Sweden will be available online), of which 14 species are new records for the country. The highest number of species was recorded in the northernmost province of Lappland and the more southern provinces of Uppland and Skåne, while much lower species numbers are reported from the middle part of Sweden. This pattern probably represents biased sampling activities of biologists rather than real differences in biodiversity of tardigrades. In view of the few studies that have been made on tardigrade biodiversity in Sweden, the relatively high number of tardigrade species recorded, representing almost a tenth of the species recorded worldwide, indicates that many more species remain to be found. In this respect, more studies of the marine ecosystems along the Swedish west coast and the long Baltic Sea coastline would be of particular interest.

  • 216.
    Guidetti, Roberto
    et al.
    Italien.
    Rebecchi, Lorena
    Italien.
    Bertolani, Roberto
    Italien.
    Jönsson, K. Ingemar
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Kristensen, Reinhardt M.
    Danmark.
    Cesari, Michele
    Italien.
    Morphological and molecular analyses on Richtersius (Eutardigrada) diversity reveal its new systematic position and lead to the establishment of a new genus and a new family within Macrobiotoidea2016Ingår i: Zoological Journal of the Linnean Society, ISSN 0024-4082, E-ISSN 1096-3642, Vol. 178, nr 4, s. 834-845Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Important contributions have been made to the systematics of Eutardigrada in recent years, but these have also revealed that several taxa are polyphyletic and that cryptic species are present. To shed light on the taxonomy and systematic position of the genus Richtersius (Eutardigrada, Macrobiotoidea), six populations attributed to Richtersius coronifer were collected and analysed from morphological (light and scanning electron microscopy) and molecular (mitochondrial cytochrome oxidase subunit 1, 18S, 28S) points of view. In particular, a new morphometric index (claw common tract: length of the common tract of the claw/total claw length × 100) and a new morphological character (stalk system) were introduced. Our integrative study was able to unveil the ‘cryptic’ species diversity within Richtersius, showing that the genus contains more than one evolutionary lineage. A morphological peculiarity in the animals of all lineages is the dimorphism in the morphology of the cuticle. Cuticular pores are present in the newborns and are lost with the first moult; this morphological change represents a novelty in the life cycle of eutardigrades. The phylogenetic analyses carried out on Richtersius populations and other Macrobiotoidea show that Richtersius is closely related to Macrobiotus islandicus, whereas Adorybiotus granulatus is more related to Richtersius and M. islandicus than to other members of the genus Macrobiotus (type genus of Macrobiotidae); therefore, the genus Macrobiotus and the family Macrobiotidae are not monophyletic. Based on these results, the new genus Diaforobiotus (for M. islandicus) and the new family Richtersiidae (composed of Richtersius, Diaforobiotus gen. nov., and Adorybiotus) are established.

  • 217.
    Guillemain, Matthieu
    et al.
    Frankrike.
    Champagnon, Jocelyn
    Frankrike.
    Pernollet, Claire A.
    Frankrike.
    Devineau, Olivier
    Norge.
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Cavallo, François
    Frankrike.
    Massez, Grégoire
    Frankrike.
    Combined effects of climate change and fluctuating habitat quality on the distribution of ducks in southern Europe2016Ingår i: 7th North American Duck Symposium: waterfowl ecology and adaptive management, 2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    Changes in waterfowl ranges over the last decades are increasingly reported, both in North America and in Europe. The relative importance of different winter quarters may fluctuate under the influence of changing local habitat conditions, as well as according to general trends caused by global climate change. Several European duck species have shifted their winter range to the North-East, i.e. the distance between breeding and wintering grounds was reduced, in a pattern consistent with a global temperature increase. In northern countries, this could also indicate an increasing proportion of sedentary birds. We compared the geographic distribution of recoveries of bands fitted to Mallard (Anas platyrhynchos) and Common Teal (A. crecca) in Camargue, southern France, over the last 60 years. Close to 75,000 ducks were banded since the early 1950s. Band recoveries occurred to a much greater extent in the Camargue area than in other parts of the flyways during the last decade compared to earlier years: as opposed to earlier studies, recoveries of Camargue-ringed ducks are increasingly made to the South-West. For migratory Teal, this indicates an increased faithfulness to the Camargue winter quarter. For Mallard, though, some birds may have become around-the-year residents: while the distance from banding site to recovery location was >400 km between the 1950s and 1970s, it is <75 km nowadays. Several hypotheses are proposed to explain these changes in European duck distributions. Survival analyses are also carried out, which help assessing whether changes in geographic distribution have also translated into altered demographic rates. Besides the overriding effects of climate change in the long-term, the present results suggest that local habitat management practices still have the potential to greatly affect the distribution of waterfowl.

  • 218.
    Guillemain, Matthieu
    et al.
    Frankrike.
    Champagnon, Jocelyn
    Frankrike.
    Pernollet, Claire A.
    Frankrike.
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Mouronval, Jean-Baptiste
    Frankrike.
    Massez, Grégoire
    Frankrike.
    Still worth the travel?: changes in Camargue teal migration patterns, body condition and demographic parameters over 60 years2015Ingår i: 4th Pan-European Duck Symposium, Hangö, Finland, 8-11/4 2015, 2015, s. 28-Konferensbidrag (Refereegranskat)
    Abstract [en]

    Climate and habitat changes linked with human activities have profoundly modified the road maps of waterfowl across their geographic ranges. If new breeding grounds open to the North, traditional wintering sites may gradually get deserted by birds short-stopping during the autumn and shifting their nonbreeding distribution. More than 60,000 ringing data were collected from wintering Teal (Anas crecca) in the area from the early 1950s to the beginning of the 2010s. Migration patterns have changed with birds now arriving much earlier, and overall population movements being much reduced during winter. The body condition of Camargue-wintering Teal has improved dramatically compared to the pre-1970 era, which could be a cause and/or a consequence of such changes in migration processes: Teal may arrive increasingly early in the year because artificial summer flooding of wetlands and baiting now provide suitable habitat and abundant accessible food. In turn, reduced movements linked with greater residency in the Camargue would impose smaller use of the body reserves. The comparison of Teal turnover and survival rates during historical (1950s- 1970s) and modern (post-2002) years provides some insight as to whether the situation has gradually improved for these birds. Conversely, the sustained use of the Camargue could simply reflect these birds being lured by artificially increased availability of food, which they would use at the expense of their survival rate, hence with no positive consequences in terms of population dynamics.

  • 219.
    Guillemain, Matthieu
    et al.
    Frankrike.
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH).
    The teal2014Bok (Refereegranskat)
    Abstract [en]

    Small, noisy and colourful, the Teal is a familiar duck throughout the wetlands and waterways Europe and Asia. Once hunted extensively for the pot, its numbers have recovered and it is now one of our commonest species of waterfowl.

    A flagship species for wetland conservation, the Teal is also an excellent model species for ecological research, and this forms the spine of this new Poyser monograph.

    The Teal looks at distribution and trends in numbers, foraging ecology, breeding behaviour), population dynamics, management and conservation of teal, looking at both the Eurasian Common Teal and its North American equivalent, the Green-winged Teal (which until relatively recently was considered to be the same species). The book provides a scientifically robust account on which wetland managers, research scientists and the ornithological community may rely, with wider implicatons for the conservation and management of other waterfowl, and for ecological research in general.

  • 220.
    Guillemain, Matthieu
    et al.
    Frankrike.
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Arzel, Céline
    Finland.
    Johnson, AR
    Simon, G
    Linking wintering and breeding grounds: good winter conditions are associated with higher breeding success in Teal Anas crecca2007Ingår i: Book of abstracts: International Union of Game Biologists XXVIII Congress, 13-18 August, 2007 / [ed] K.I. Sjöberg & T. Rooke, 2007, s. 285-Konferensbidrag (Refereegranskat)
  • 221.
    Guillemain, Matthieu
    et al.
    Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice La Tour du Valat, Le Sambuc, Arles.
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Gauthier-Clerc, Michel
    Centre de Recherche de la Tour du Valat Le Sambuc, Arles.
    Massez, Grégoire
    Les Marais du Vigueirat Mas Thibert, Arles .
    Hearn, Richard
    Wildfowl & Wetlands Trust, Slimbridge, Gloucester.
    Champagnon, Jocelyn
    Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice La Tour du Valat, Le Sambuc, Arles .
    Simon, Géraldine
    Centre de Recherche de la Tour du Valat Le Sambuc, Arles .
    Wintering French mallard and teal are heavier and in better body condition than 30 years ago: effects of a changing environment?2010Ingår i: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 39, nr 2, s. 170-180Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Animal populations are exposed to large-scale anthropogenic impact from e.g. climate change, habitat alteration and supplemental stocking. All of these may affect body condition in wintering dabbling ducks, which in turn may affect an individual's survival and reproductive success. The aim of this study was to assess whether there have been morphometric changes in Mallard (Anas platyrhynchos) and Teal (Anas crecca) over the last 30 years at a major wintering site. Body mass and condition increased from the 1950s-1960s to the 2000s in both species. The increase in body mass amounted to as much as 11.7%, with no corresponding change in body size. Improved body condition was maintained from early to mid-winter, but then converged with historical values for late winter. Our interpretation is that increasingly benign ambient winter conditions permit ducks to maintain better energetic "safety margins" throughout winter, and that converging spring departure values may be related to evolutionary flight energetic optima. The observed changes are consistent with large-scale climate amelioration and local/regional habitat improvement (both anthropogenic).

  • 222.
    Guillemain, Matthieu
    et al.
    Frankrike.
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH).
    Pernollet, Claire A.
    Frankrike.
    Arzel, Celine
    Finland.
    Eadie, John M.
    USA.
    Agent-based modeling may help to merge research traditions in foraging ecology in Europe and North America2017Ingår i: Wildlife Society bulletin, ISSN 0091-7648, E-ISSN 1938-5463, Vol. 41, nr 1, s. 170-176Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Although ducks have long been popular research subjects in both North America and Europe, geographical divergences in research orientation have developed during the past several decades for studying foraging ecology. In North America, foraging studies largely focused on the population level with an emphasis on foraging energetics aimed at improving waterfowl production through increased carrying capacity of wetlands in breeding areas, an approach later expanded to nonbreeding grounds. In Europe, studies have instead focused on inter-individual differences in behavior of foraging ducks, with an emphasis on individual efficiency (e.g., methods, intake rate, patch choice) within the framework of optimal foraging theory. We suggest that agent-based models (also termed individual-based behavior models), which aim to predict habitat use from the heterogeneous behavior of different individual agents, can help to unify these approaches and would benefit considerably from increased collaboration and integration of the approaches of both North American and European researchers.

  • 223.
    Guillemain, Matthieu
    et al.
    Frankrike.
    Pernollet, Claire A.
    Frankrike.
    Arzel, Céline
    Finland.
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Eadie, John
    USA.
    Foraging, nutrition, and energetics of waterfowl: a European perspective2016Ingår i: 7th North American Duck Symposium: waterfowl ecology and adaptive management, 2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    Much attention has historically been devoted to feeding ecology of waterfowl, providing an extensive research record for Europe and North America alike. However, research in this field has gradually followed different paths on the two continents. American scientists have adopted a more applied perspective, often aiming at assessing the extent to which food requirements of waterfowl can be fulfilled in different habitats, and how management of these can increase carrying capacity. As opposed to this "energetic" approach, European scientists have rather framed their studies in a "behavioral" perspective, using waterfowl as model species for more theoretical approaches to foraging ecology. Consequently, while North American research has most often been carried out at the scale of waterfowl populations, the individual bird has more frequently been the scale of study in Europe. We present three examples of such European studies: first, a detailed analysis of the trade-offs made by dabbling ducks between foraging and anti-predator vigilance, leading to divergent strategies to face gradual food depletion during the winter. Second, we do a flyway-scale analysis of duck foraging needs and behavior, from Mediterranean wintering grounds to breeding sites in the Boreal, and point out the main hurdles faced by these birds across their annual cycle. Such detailed European studies can provide useful parameter values to fuel modern agent-based models of habitat use and carrying capacity developed in North America, hence cross-fertilizing the approaches on the two continents. This is exactly what our third example is about; namely adapting the SWAMP model developed in California to better understand and predict the use of harvested rice fields by wintering ducks in southern France.

  • 224.
    Guillemain, Matthieu
    et al.
    Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice, La Tour du Valat, Le Sambuc, Arles.
    Pöysä, Hannu
    Finnish Game and Fisheries Research Institute, Joensuu Game and Fisheries Research.
    Fox, Anthony D.
    Thomas Eske Holm & Thomas Kjær Christensen, Department of Bioscience, Aarhus University.
    Arzel, Céline
    Department of Biology, Section of Ecology, University of Turku.
    Dessborn, Lisa
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Ekroos, Johan
    Centre for Environmental and Climate Research, Lund.
    Gunnarsson, Gunnar
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Eske Holm, Thomas
    Thomas Eske Holm & Thomas Kjær Christensen, Department of Bioscience, Aarhus University.
    Kjær Christensen, Thomas
    Thomas Eske Holm & Thomas Kjær Christensen, Department of Bioscience, Aarhus University.
    Lehikoinen, Aleksi
    Department of Biological and Environmental Sciences, University of Helsinki.
    Mitchell, Carl
    Wildfowl & Wetlands Trust, Slimbridge.
    Rintala, Jukka
    Finnish Game and Fisheries Research Institute, Helsinki.
    Pape Møller, Anders
    Laboratoire Ecologie Systématique et Evolution (UMR 8079), Université Paris-Sud XI, Orsay.
    Effects of climate change on European ducks: what do we know and what do we need to know?2013Ingår i: Wildlife Biology, ISSN 0909-6396, E-ISSN 1903-220X, Vol. 19, nr 4, s. 404-419Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The consequences of climate change for bird populations have received much attention in recent decades, especially amongst cavity-nesting songbirds, yet little has been written on ducks (Anatidae) despite these being major elements of wetland diversity and important quarry species. This paper reviews the major known consequences of climate change for birds in general, and relates these to the limited information available specifically for ducks. Climate change can influence migration distance and phenology, potentially affecting patterns of mortality, as well as distribution and reproductive success in ducks. Studies addressing effects of climate change are, however, restricted to very few duck species, including mallardAnas platyrhynchos and common eider Somateria mollissima. Shifts in winter duck distributions have been observed, whereas the mismatch hypothesis (mistiming between the periods of peak energy requirements for young and the peak of seasonal food availability) has received limited support with regard to ducks. We propose a range of monitoring initiatives, including population surveys, breeding success monitoring schemes and individual duck marking, which should later be integrated through population modelling and adaptive management to fill these gaps.

  • 225.
    Gunnarsson, Gunnar
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Strandängarna i Kristianstads Vattenrike – hotade “hot spots”2015Ingår i: Forskningsmiljön Man & Biosphere Health: Högskolan Kristianstads miljöforskning i biosfärområde Kristianstads Vattenrike / [ed] Ingemar Jönsson, Kristianstad: Kristianstads kommun , 2015, s. 7-11Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [sv]

    På relativt kort tid har flera arter strandängsvadare minskat dramatiskt i Kristianstads Vattenrike. Pågående forskning bedrivs för att utröna om nedgångarna kan ha orsakats av faktorer längre ner i näringsväven. I speciellt fokus för forskningen är produktionen av vegetation och ryggradslösa djur.

  • 226.
    Gunnarsson, Gunnar
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Vem äter vad på Håslövs ängar?: mätningar av betestryck med kopplingar till det ekologiska samhället2013Konferensbidrag (Övrig (populärvetenskap, debatt, mm))
  • 227.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Elmberg, Johan
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Density-dependent nest predation in dabbling ducks2002Konferensbidrag (Refereegranskat)
  • 228.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Elmberg, Johan
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Predation regulates the survival of mallard nests as revealed by an experiment in two landscape types2006Konferensbidrag (Refereegranskat)
    Abstract [en]

    Ecological theory frequently postulates that most animal species are subject to density-dependent mechanisms in some stage of the year or life. However, few avian studies have succeeded to give evidence for regulatory mechanisms by replicated experiments in natural habitats. Breeding success is to a great extent determined by conditions during the nesting period and the major cause of nesting failure is nest predation. In addition, predators may possibly regulate fluctuating populations and to test the hypothesis that nest survival is negatively density-dependent we conducted an experiment with manipulated densities of semi-natural Mallard nests and adult pairs using 32 small to medium sized lakes (~3-5 hectares) in southern Sweden during two nesting seasons (2003-2004). Predicting that predation rates are higher in open compared to more vegetated habitats, half of the lakes were in agricultural and the other half in forest landscapes. Using real Mallard eggs, nests were constructed in two densities; either 2 nests per lake (low density) or 8 nests per lake (high density). Model fitting in program MARK revealed that nest survival was negatively affected by nest density but not by pair density. Further, predation rates were much higher in agricultural landscapes than in forested. The effects of nest density and habitat were consistent in the two years. Covariates added to the model matrix revealed a negative effect of other waterfowl present on the lakes and a positive effect of study day. However, the number of avian predators observed at the lakes did not affect survival. Our experiment is the first to demonstrate density-dependent nest predation in Mallard. The consistency of the density effect between years and habitats shows that regulatory mechanisms may be truly significant for Mallard, possibly affecting population dynamics of the species.

  • 229.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Dessborn, Lisa
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Jonzén, Niclas
    Department of Theoretical Ecology, Lund University.
    Pöysä, Hannu
    Finnish Game and Fisheries Research Institute, Joensuu.
    Valkama, Jari
    Finnish Museum of Natural History, Helsinki.
    Survival estimates, mortality patterns, and population growth of Fennoscandian mallards Anas platyrhynchos2008Ingår i: Annales Zoologici Fennici, ISSN 0003-455X, E-ISSN 1797-2450, Vol. 45, nr 6, s. 483-495Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Long-term mallard capture-recapture data from Sweden and Finland were analyzed to describe temporal mortality patterns and reasons. We used program MARK and Seber models to estimate annual survival (S) and recovery (r) rates. Survival rates were used in a Monte Carlo simulation to evaluate the correspondence between observed and predicted annual population sizes of a Finnish sub-population. About 90% of recovered birds died from hunting. Most recoveries were from the hunting season, and more males than females were shot. Predation was the most common cause of natural mortality. Finnish capture-recapture data fitted best the global model in which survival and recovery vary with age and sex. Annual survival and recovery rates for adult and juvenile males and females were overlapping, ranging from 0.46 to 0.90 (survival) and 0.07 to 0.17 (recovery), whereas pulli had lower survival rates (0.21-0.42). Pulli that were successfully sexed at the time of ringing had higher recovery rates (female pulli: 0.23; male pulli: 0.32) than juveniles and adults. Density-dependent fledgling production was detected in the Finnish sub-population and was accounted for in the Monte Carlo simulation, which estimated predicted breeding population size quite well, although one of the observed annual values (2003) fell outside the 95% confidence limits.

  • 230.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Pöysä, Hannu
    Joensuu Game and Fisheries Research, Finnish Game and Fisheries Research Institute.
    Sjöberg, Kjell
    Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Umeå.
    Dessborn, Lisa
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Arzel, Céline
    Section of Ecology, Department of Biology, Turku University.
    Density dependence in ducks: a review of the evidence2013Ingår i: European Journal of Wildlife Research, ISSN 1612-4642, E-ISSN 1439-0574, Vol. 59, nr 3, s. 305-321Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Density dependence (DD) is a central concept in population ecology and in the management of harvested populations. For example, DD underpins the idea of additive versus compensatory mortality and is a tenet in the paradigm of resource limitation and regulation. Yet the prevalence and importance of DD remains disputed in most organisms, including ducks, which are focal in game management, conservation and zoonotic diseases. Based on 154 data entries from 54 studies in the peer-reviewed literature, we here synthesize and evaluate the prevalence of DD in breeding ducks in relation to (1) species and guild (dabbling versus diving ducks), (2) stage in the breeding cycle (nesting, duckling, recruitment) or, alternatively, in terms of population dynamics, (3) study type (descriptive/nonmanipulative versus experimental), (4) continent (Europe versus North America), (5) spatial level (wetland, landscape, regional, continental) and (6) biome (tundra, boreal, nemoral, prairie, mediterranean). One conclusion from this review is that it is difficult to find general patterns about the prevalence of DD unless data are broken down to subsets, for example, to stage or spatial level. With respect to stage, DD effects occur at all stages of the breeding cycle. During the nesting and duckling stages, the frequency of cases detecting versus not detecting DD is roughly the same. However, in cases referring to the recruitment stage, i.e. to survival of fledged ducks until 1 year old at the most, DD was the rule, suggesting that DD processes may operate mainly outside the breeding season. Further subdivision of data shows that spatial scale is important to the prevalence of DD in nesting ducks—rare on the wetland level and more common on higher spatial levels. In studies of population dynamics (i.e. based on time series data only), DD was more often found in diving than in dabbling ducks. This corroborates previous suggestions that dabbling ducks largely should be considered as r-selected species, in contrast to more K-selected diving ducks, which start to reproduce at an older age and often breed in more stable wetland environments where resources may be easier to track and populations thus often are closer to carrying capacity. However, the picture of DD in ducks is far from complete, and knowledge gaps for future studies to address include: (a) data from Russia, which holds a large part of the breeding ducks in the Northern hemisphere, (b) experimental studies on more species to separate density-dependent factors from other drivers of population change and to tease apart spatial and temporal interactions in the underlying processes, (c) time series analyses addressing population dynamics, especially from outside North America, (d) studies relating duck numbers to limiting resources, which arguably is the most relevant measure of density, (e) the timing of DD processes in relation to harvest and natural mortality.

  • 231.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Elmberg, Johan
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Sjöberg, Kjell
    SLU.
    Pöysä, Hannu
    Finland.
    Nummi, Petri
    Finland.
    Experimental evidence for density-dependent breeding success in mallards2005Konferensbidrag (Refereegranskat)
    Abstract [en]

    It is unresolved to what extent waterfowl populations are regulated by density-dependent pro cesses. By doing a 2-year crossover perturbation exper iment on ten oligotrophic boreal lakes we addressed the hypothesis that breeding output is density depen dent. Wing-clipped mallard (Anas platyrhynchos) hens were introduced with their own brood and then moni tored for 24 days. Predicted responses were that per capita duckling and hen survival would be lower in high-density than in low-density treatments. Survival was evaluated by model fitting in program MARK. Density, year, and lake were used as main effects, while day after introduction, a weather harshness index, and presence of hens were covariates. Daily survival in ducklings was lower in the high-density treatment, but this effect was year dependent. The highest-ranking model for duckling survival also included a positive effect of duckling age and presence of hens, and a nega tive effect of harsh weather. Density did not affect female survival although there was a prominent year effect. The highest-ranking model for female survival also included negative effects of day after introduction and harsh weather. This is the first study to report den sity-dependent survival in experimentally introduced ducklings in a natural setting. Implications for population dynamics and management of harvested populations are far-reaching if such regulation occurs in some years, but not in others.

  • 232.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Elmberg, Johan
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Sjöberg, Kjell
    SLU.
    Pöysä, Hannu
    Finland.
    Nummi, Petri
    Finland.
    Food limits survival in breeding mallards2003Ingår i: Integrating wildlife with people, 10th International Perdix Symposium, Braga, Portugal, September 1st-6th 2003: abstracts and contributing authors, Braga: International Union of Game Biologists , 2003Konferensbidrag (Refereegranskat)
  • 233.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Elmberg, Johan
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Sjöberg, Kjell
    SLU.
    Pöysä, Hannu
    Finland.
    Nummi, Petri
    Finland.
    Food limits survival of breeding boreal mallards Anas platyrhynchos2003Konferensbidrag (Refereegranskat)
    Abstract [en]

    During the breeding period dabbling ducks (Anas sp.), and especially newly hatched ducklings, face heavy mortality. The reasons are not clear, but suggested factors contributing are scarce food, predation, chilling and disease. We highlighted the question why many of the boreal lakes in Scandinavia are without breeding ducks and why mortality is considerable during brood period. In an experimental study in 2002 we hypothesized food being a major factor deciding duck survival during breeding. One wing-clipped hen mallard with her own newly hatched brood (10 ducklings) was introduced onto each of 10 lakes. Food was added ad libitum at 5 of these lakes (experimental lakes), whereas the other five lakes (controls) did not get any extra food added. Survival of hens, broods as well as each individual duckling was monitored regularly until 24 days after introduction. At all three levels (i.e. duckling, brood and adult), survival was significantly higher on lakes with food added than on control lakes, although the difference was most pronounced on the duckling level. Direct consequences (i.e. dying from starvation) as well as indirect (e.g. undernourished individuals being more easily taken by predators) may both explain this pattern. Our results clearly show that food is a major limiting factor on mallard survival in this environment. Also, our results may explain why many boreal lakes in Scandinavia do not have any breeding waterfowl at all. It seems likely that such lakes are too poor to raise broods and even to sustain adults.

  • 234.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Waldenström, Jonas
    Section for Zoonotic Ecology and Epidemiology, School of Natural Sciences, Linnaeus University, Kalmar.
    Trends in body mass of ducks over time: the hypotheses in Guillemain et al. revisited2011Ingår i: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 40, nr 3, s. 338-340Artikel i tidskrift (Refereegranskat)
  • 235.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Hessel, Rebecca
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Ottvall, Richard
    Ottvall et al.
    Bristande födotillgång och torrare vårar på strandängarna i Kristianstads Vattenrike: möjliga orsaker till vadarnas tillbakagång?2013Rapport (Övrigt vetenskapligt)
    Abstract [sv]

    Strandängsvadarna har minskat påtagligt i antal längs nedre Helgeån i Kristianstads Vattenrike. Orsaken till minskningarna är inte uppenbara, men ett antal möjliga faktorer har lyfts fram. I den här rapporten presenteras studier som genomfördes 2012 med målet att undersöka två av dessa faktorer, nämligen (1) vadarnas födotillgång (dvs. förekomst av ryggradslösa djur) och hur den kan ha påverkats av sommaröversvämningen 2007, samt (2) om det finns stöd i väder- och hydrologiska data att vårarna har blivit torrare.

    Tillgången på föda var överlag god på själva strandängarna. I våtmarkerna (vätor, Helge å, Hammarsjön) var det däremot stora skillnader mellan lokaler i Vattenriket, med högre förekomster av ryggradslösa djur längre ner i Helge å-systemet (dvs. närmare utloppet i Hanöbukten) än högre upp. Detta kan vara en kvarvarande effekt av sommaröversvämningen 2007.

    Några tydliga tendenser till torrare vårar under perioden 1990–2012 kunde inte skönjas vid analyser av väder- och hydrologiska data. Möjligen kan man säga att vårarna i början av 1990-talet var relativt torra för att följas av våtare vårar under andra halvan av 1990-talet och att 2000-talet har dominerats av torra vårar. Det är emellertid inte möjligt att utifrån befintliga data göra några säkra uttalanden om eventuella långtgående förändringar som kan ha påverkat vadarnas livsmiljöer eller häckningsframgång.

    För att vända den negativa trenden med sviktande populationer av strandängsvadare behövs drastiska och omedelbara åtgärder. Dessa inbegriper främst att få bukt med alltför kortsnaggade och ensartade ängar, för hög predation, och vätor som torkar ut för snabbt.

  • 236.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Latorre-Magalef, N.
    Hobson, K.A.
    van Wilgenburg, S.L.
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Olsen, B.
    Fouchier, R.A.M.
    Waldenström, J.
    Within-season trends in natal orgin, body size, and influenza a virus subtypes in migrating mallards2012Konferensbidrag (Övrigt vetenskapligt)
  • 237.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Latorre-Margalef, Neus
    Hobson, Keith A
    Van Wilgenburg, Steven L
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Olsen, Björn
    Fouchier, R A M
    Waldenström, Jonas
    Within-season trends in natal origin, body size, and influenza A virus subtypes in migrating Mallards2012Konferensbidrag (Refereegranskat)
  • 238.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Latorre-Margalef, Neus
    Hobson, Keith H
    Van Wilgenburg, Steven L
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Olsen, Björn
    Fouchier, R A M
    Waldenström, Jonas
    Within-season trends in natal origin, body size, and influenza A virus subtypes in migrating Mallards2012Konferensbidrag (Refereegranskat)
  • 239.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Latorre-Margalef, Neus
    Munster, Vincent
    Wallensten, Anders
    Fouchier, Ron
    Osterhaus, Albert
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Olsen, Björn
    Waldenström, Jonas
    Are body mass and staging time in Mallards (Anas platyrhynchos) affected by infection of influenza A?2007Konferensbidrag (Refereegranskat)
  • 240.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Ottvall, Richard
    Vadare i Vattenriket – matbrist?2012Konferensbidrag (Övrigt vetenskapligt)
  • 241.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Sjöberg, Kjell
    SLU.
    Elmberg, Johan
    Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Pöysä, Hannu
    Finland.
    Nummi, Petri
    Finland.
    Does climate change affect the breeding success of Mallards Anas platyrynchos?2007Konferensbidrag (Refereegranskat)
  • 242.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
    Waldenström, Jonas
    Högskolan i Kalmar.
    Influenza A and sub-lethal effects in mallards at Ottenby, southern Sweden2007Konferensbidrag (Refereegranskat)
  • 243.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Waldenström, Jonas
    Section for Zoonotic Ecology and Epidemiology, School of Natural Sciences, Linnaeus University.
    Fransson, Thord
    Bird Ringing Centre, Department of Vertebrate Zoology, Swedish Museum of Natural History, Stockholm.
    Direct and indirect effects of winter harshness on the survival of Mallards Anas platyrhynchos in Northwest Europe2012Ingår i: Ibis, ISSN 0019-1019, E-ISSN 1474-919X, Vol. 154, nr 2, s. 307-317Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    To understand population dynamics it is necessary to understand vital rates, which may be affected by a wide range of factors including environmental variables such as weather. Weather conditions can affect birds’ vital rates directly through increased mortality due to impaired conditions, or indirectly via changes in body condition and/or behaviour. Most understanding of direct and indirect effects of weather comes from studies of breeding birds, whereas the situation in non-breeding periods is less clear. Here, we analysed annual survival of non-breeding Mallard Anas platyrhynchos, the most hunted waterfowl species in Europe, and assessed whether survival is related directly to winter harshness and/or indirectly via changes in winter recovery distributions. Recovery data on Mallards, initially marked in southeast Sweden, were analysed with an information-theoretic approach using program mark. Over 10 000 Mallards were marked in two time periods, 1964–1982 and 2002–2008, of which 13.3 and 4.7%, respectively, were later recovered. Mallards had lower annual survival in the early trapping period (0.58–0.63) than in the later period (0.69–0.71), with no clear effects of sex, age or year. Within each study period, winter harshness did not directly correlate with survival. However, milder winters may have contributed indirectly to higher survival in the second period, as winter harshness data were correlated with the distances to recovery positions for females, and also because winter recovery areas have shifted northeast during the past decades, possibly indicating a shortened migratory distance. Migration is costly, and there is therefore a likely linkage between migration behaviour and survival of dabbling ducks, in which direct as well as indirect effects of winter harshness may play a role. Other factors, such as hunting pressure, are also likely to have changed in the past decades, and may also have contributed to improved survival of Mallards in northwest Europe.

  • 244.
    Gunnarsson, Gunnar
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Waldenström, Jonas
    Section for Zoonotic Ecology and Epidemiology, School of Natural Sciences, Linnaeus University.
    Fransson, Thord
    Bird Ringing Centre, Department of Vertebrate Zoology, Swedish Museum of Natural History, Stockholm.
    Improved mallard survival in Northern Europe over the past forty years2011Ingår i: Abstracts from “Nordic Waterbirds in a warming world”: Öster Malma 24-28 Oct 2011, 2011, s. 12-Konferensbidrag (Refereegranskat)
    Abstract [en]

    Vital rates are the cornerstones affecting population dynamics, and are necessary to estimate in order to judge population viability. Knowledge about vital rates and their changes over time is especially important for hunted species, for example to be able to determine sustainable harvest levels. We estimated annual age and sex specific survival rates of the most common waterfowl game in Europe, i.e. the Mallard (Anas platyrhynchos), and studied possible links between survival and hunting pressure, weather (winter harshness) and migration behaviour. Ringing data, covering more than forty years (1964-1982 [called ‘yearly period’] and 2002-2008 [called ‘late period’]), were collected in one stationary duck trap located at Ottenby, south-east Sweden, and mark-recovery data were analysed with a theoretic-information approach using program MARK. In total 10,490 Mallards were marked, i.e. 6,409 in the early period and 4,081 in the late, of which 13.3% (early period) and 4.7% (late period) were recovered dead (mostly hunting; >92%). Within each time period, the survival of Mallards was not dependent on age, sex and year. However, when the different time periods were compared, annual survival was lower in the early period (0.58–0.63) compared to the late (0.69–0.71). There are several possible explanations why survival has improved. Although winter harshness did not directly correlate to survival in the modelling analyses, relationships may be more intricate than as it first appears. Firstly, data show that Mallards in the late period have better body condition (body mass) than in the early period, which may have several explanations, including climate aspects. Secondly, data suggest that the Mallard has shortened its migratory route when time periods are contrasted, with wintering areas further to the north in the late period. Again milder winters may have contributed to this pattern as migrating distances for female Mallards were correlated with winter harshness data. As a consequence, this could potentially also affect survival since migration is costly. Finally, although it is hard to quantify, hunting pressure may also have played a role since it seems to be lower in the late period compared to the early.

  • 245. Hagman, M.
    et al.
    Kärvemo, S.
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Löwenborg, K.
    Life at the edge: the nesting ecology of the world´s most northerly oviparous snake and its implications for conservation2013Ingår i: Reptiles in research: investigations of ecology, physiology, and behavior from desert to sea / [ed] Lutterschmidt, William I., Hauppauge, NY: Nova Science Publishers, Inc., 2013, s. 247-264Kapitel i bok, del av antologi (Refereegranskat)
  • 246. Hagman, Mattias
    et al.
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    "Museum mining": a method for investigating population trends2012Ingår i: 7th World Congressof Herpetology, Vancouver, Canda, August 2012: abstract book, 2012, s. 281-Konferensbidrag (Refereegranskat)
  • 247.
    Hagman, Mattias
    et al.
    Stockholm University.
    Elmberg, Johan
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Man and Biosphere Health (MABH).
    Kärvemo, Simon
    Swedish University of Agricultural Sciences.
    Löwenborg, Kristin
    Stockholm University.
    Grass snakes (Natrix natrix) in Sweden decline together with their anthropogenic nesting-environments2012Ingår i: Herpetological Journal, ISSN 0268-0130, Vol. 22, nr 3, s. 199-202Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this paper we show that the number of grass snake (Natrix natrix L.) specimens deposited in Swedish museum collections has declined in the last eighty years, and that this is correlated with a dramatic national decrease in the number of livestock holdings. These results support the hypothesis that Swedish grass snakes are declining and that this may be linked to a loss of important nesting-environments provided by open manure heaps in small-scale farming. Our study suggests that information obtained from museum databases potentially may be used to explore population trends for snakes and other reptiles.

  • 248.
    Halldén, Christer
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Biomedicin.
    Knobe, K. E.
    Departments of Pediatrics and Malmö Centre for Thrombosis and Haemostasis, Skåne University Hospital, Malmö.
    Sjörin, E.
    Departments of Pediatrics and Malmö Centre for Thrombosis and Haemostasis, Skåne University Hospital, Malmö.
    Nilsson, Daniel
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Biomedicin.
    Ljung, R.
    Departments of Pediatrics and Malmö Centre for Thrombosis and Haemostasis, Skåne University Hospital, Malmö.
    Investigation of disease-associated factors in haemophilia A patients without detectable mutations2012Ingår i: Haemophilia, ISSN 1351-8216, E-ISSN 1365-2516, Vol. 18, nr 3, s. e132-e137Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    To investigate disease causing mechanism in haemophilia A patients without detectable mutation. Screening for F8 mutations in 307 haemophilia A patients using: re-sequencing and inversion PCR, reverse transcription (RT-PCR) of mRNA, MLPA analysis, haplotyping using SNP and microsatellite markers. No F8 mutations were detected in 9 of the 307 patients (2.9%) using re-sequencing and inversion PCR. MLPA analysis detected duplication in exon 6 in one patient and RT-PCR showed no products for different regions of mRNA in four other patients, indicating failed transcription. No obvious associations were observed between the phenotypes of the nine patients, their F8 haplotypes and the putative mutations detected. The mutation-positive patients carrying the same haplotypes as the mutation-negative patients show a multitude of different mutations, emphasizing the lack of associations at the haplotype level. VWF mutation screening and factor V measurements ruled out type 2N VWD and combined factor V and VIII deficiency respectively. To further investigate a possible role for FVIII interacting factors the haplotypes/diplotypes of F2, F9, F10 and VWF were compared. The nine patients had no specific haplotype/diplotype combination in common that can explain disease. Duplications and faulty transcription contribute to the mutational spectrum of haemophilia A patients where conventional mutation screening fail to identify mutations.

  • 249.
    Halldén, Christer
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Biomedicin.
    Mårtensson, A.
    Department of Paediatrics and Malmö Centre for Thrombosis and Haemostasis, Skåne University Hospital, Lund University, Malmö.
    Nilsson, Daniel
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Biomedicin.
    Säll, T.
    Department of Biology, Lund University.
    Lind-Halldén, Christina
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Biomedicin.
    Lidén, Annika C.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Biomedicin.
    Ljung, R.
    Department of Paediatrics and Malmö Centre for Thrombosis and Haemostasis, Skåne University Hospital, Lund University, Malmö.
    Origin of Swedish hemophilia B mutations2013Ingår i: Journal of Thrombosis and Haemostasis, ISSN 1538-7933, E-ISSN 1538-7836, Vol. 11, nr 11, s. 2001-2008Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND: More than 1100 mutations that cause hemophilia B (HB) have been identified. At the same time, specific F9 mutations are present at high frequencies in certain populations, which raise questions about the origin of HB mutations.

    OBJECTIVES: To describe the mutation spectrum of all HB families in Sweden and investigate if mutations appearing in several families are due to independent recurrent mutations (RMs) or to a common mutation event (i.e. are identical by descent (IBD)).

    PATIENTS/METHODS: The registered Swedish HB population consists of patients from 86 families. Mutations were identified by resequencing and identical haplotypes were defined using 74 markers and a control population of 285 individuals. The ages of IBD mutations were estimated using ESTIAGE.

    RESULTS: Out of 77 presumably unrelated patients with substitution mutations, 47 patients (61%) had mutations in common with other patients. Haplotyping of the 47 patients showed that 24 patients had IBD mutations (51%) with estimated ages of between two and 23 generations. A majority of these patients had mild disease. Eight of the 15 mutations observed in more than one family were C>T transitions in CpG sites and all eight were RMs.

    CONCLUSIONS: The association of IBD mutations with a mild phenotype is similar to what has been previously observed in hemophilia A. Noteworthy features of the mutations that are common to more than one family are the equal proportions of patients with RM and IBD mutations and the correlation between the occurrence of RMs and C>T transitions at CpG sites.

  • 250.
    Halldén, Christer
    et al.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Biomedicin.
    Nilsson, Daniel
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Biomedicin.
    Säll, Torbjorn
    Department of Biology, Lund University.
    Lind-Halldén, Christina
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Biomedicin.
    Lidén, Annika C.
    Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap. Högskolan Kristianstad, Forskningsmiljön Biomedicin.
    Ljung, R.
    Department of Pediatrics and Malmö Center for Thrombosis and Hemostasis, Lund University.
    Origin of Swedish hemophilia A mutations2012Ingår i: Journal of Thrombosis and Haemostasis, ISSN 1538-7933, E-ISSN 1538-7836, Vol. 10, nr 12, s. 2503-2511Artikel i tidskrift (Refereegranskat)
    Abstract [en]

     Background: Hemophilia A (HA) has a high level of variation within the disease class, with more than 1000 mutations being listed in the HAMSTeRS database. At the same time a number of F8 mutations are present in specific populations at high frequencies. Objectives: The simultaneous presence of large numbers of rare mutations and a small number of high-frequency mutations raises questions about the origins of HA mutations. The present study was aimed at describing the origins of HA mutations in the complete Swedish population. The primary issue was to determine what proportion of identical mutations are identical by descent (IBD) and what proportion are attributable to recurrent mutation events. The age of IBD mutations was also determined. Patients/Methods: In Sweden, the care of HA is centralized, and the Swedish HA population consists of ∼ 750 patients from > 300 families (35% severe, 15% moderate, and 50% mild). Identical haplotypes were defined by single-nucleotide polymorphism and microsatellite haplotyping, and the ages of the mutations were estimated with estiage. Results: Among 212 presumably unrelated patients with substitution mutations, 97 (46%) had mutations in common with other patients. Haplotyping of the 97 patients showed that 47 had IBD mutations (22%) with estimated ages of between two and 35 generations. The frequency of mild disease increased with an increasing number of patients sharing the mutations. Conclusions: A majority of the IBD mutations are mild and have age estimates of a few hundred years, but some could date back to the Middle Ages.

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