hkr.sePublikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Breeding success of sympatric dabbling ducks in relation to population density and food resources
Högskolan Kristianstad, Institutionen för matematik och naturvetenskap. (Akvatisk biologi och kemi)
Department of Applied Biology, University of Helsinki.
Finnish Game and Fisheries Res. Inst., Joensuu Game and Fisheries Research.
Department of Animal Ecology, Swedish University of Agricultural Sciences, Umeå.
2003 (Engelska)Ingår i: Oikos, ISSN 0030-1299, E-ISSN 1600-0706, Vol. 100, nr 2, s. 333-341Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Breeding success in sympatric mallard Anas platyrhynchos, teal A. crecca and wigeon A. penelope in a boreal watershed in Finland was studied for 12 years. Benthic and surface-emerging prey animals were trapped to obtain annual indices of food abundance. Mallard and teal were equally abundant over the years, being roughly twice as numerous as wigeon. Pair density, brood:pair ratio and duckling:pair ratio were used to test the hypothesis that per capita breeding success decreases in a density-dependent fashion as either pair density or the number of nesting pairs per available food unit increases. In mallard we found no density-dependent patterns at all. In teal per capita brood production decreased as prey animals became relatively scarcer, but this interpretation may not be robust. In wigeon, however, there were two independent significant patterns of direct density-dependence in a temporal succession, i.e. between pair density and per capita brood production in the early part of the breeding season, and then between per capita abundance of surface-emerging insect prey and the number of ducklings per pair. Despite wide dietary overlap and frequent co-occurrence on single lakes among species in the guild, we found no evidence for interspecific density-dependent effects. We hypothesize that there is no or infrequent food limitation for breeding dabblers in this system, and that behavior may be the process behind the pattern of density-dependence in wigeon.

Ort, förlag, år, upplaga, sidor
2003. Vol. 100, nr 2, s. 333-341
Nyckelord [en]
ANAS-PLATYRHYNCHOS, MALLARD DUCKLINGS, NATURAL-POPULATIONS, TIME-SERIES, HABITAT, DEPENDENCE, LIMITATION, TESTS, RECRUITMENT, PATTERNS
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
URN: urn:nbn:se:hkr:diva-5383DOI: 10.1034/j.1600-0706.2003.11934.xISI: 000181854900014ISBN: 0030-1299 (tryckt)OAI: oai:DiVA.org:hkr-5383DiVA, id: diva2:319176
Tillgänglig från: 2010-05-14 Skapad: 2009-12-07 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltext

Personposter BETA

Elmberg, Johan

Sök vidare i DiVA

Av författaren/redaktören
Elmberg, Johan
Av organisationen
Institutionen för matematik och naturvetenskap
I samma tidskrift
Oikos
Biologiska vetenskaper

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
isbn
urn-nbn

Altmetricpoäng

doi
isbn
urn-nbn
Totalt: 65 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf