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
Experimentally manipulating early and late breeding in mallards
SLU.
Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.ORCID-id: 0000-0003-2345-3953
Högskolan Kristianstad, Forskningsmiljön Man & Biosphere Health (MABH). Högskolan Kristianstad, Sektionen för lärande och miljö, Avdelningen för Naturvetenskap.
Finland.
Visa övriga samt affilieringar
2006 (Engelska)Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

We used imprinted ducklings and wing-clipped female mallards with broods as a complement to observational field studies. Because mallard ducklings search for food by themselves, the food searching efficiency and behaviour of imprinted ducklings and ducklings together with a wing-clipped female ought to reflect the general conditions in the lake they search for food, if not in a strict quantitative way, at least it should reflect the relative differences in conditions for the lakes used in the experiments. We were interested in why mallards start breeding so early and how climate change might influence early and late breeding ducks. In a cross over experiment conducted 2004 and 2005, we studied the result of releasing two sets of female mallards with ducklings. The first one was done close to the same time as wild mallards normally started their breeding season in the region. The other set of broods was delayed 12 days. The eggs for the late release of ducklings were kept at low temperature and 12 days later they were put under sitting mallard females. The hens and broods were subsequently released with an interval of 12 days (one brood in each of 10 lakes in the first release, and the late release in ten other lakes). The next year the lakes were reversed. Survival of ducklings was followed every day during the first 12 days, and later every 4 days up till 24 days. Invertebrates in the lakes were sampled as well (of both benthic and pelagic origins). The data are analyzed in relation to food abundance during the early and late part of the two breeding seasons.

Ort, förlag, år, upplaga, sidor
2006.
Nationell ämneskategori
Ekologi
Identifikatorer
URN: urn:nbn:se:hkr:diva-6799OAI: oai:DiVA.org:hkr-6799DiVA, id: diva2:327154
Konferens
The fourth North American Duck Symposium, Bismarck, North Dakota, USA
Tillgänglig från: 2010-06-28 Skapad: 2010-06-28 Senast uppdaterad: 2016-02-08Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Personposter BETA

Gunnarsson, GunnarElmberg, Johan

Sök vidare i DiVA

Av författaren/redaktören
Gunnarsson, GunnarElmberg, Johan
Av organisationen
Forskningsmiljön Man & Biosphere Health (MABH)Avdelningen för Naturvetenskap
Ekologi

Sök vidare utanför DiVA

GoogleGoogle Scholar

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 54 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