Logotyp: till Uppsala universitets webbplats

uu.sePublikationer från Uppsala universitet
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • 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
Heritability of head size in the common gull Larus canus in relation to environmental conditions during offspring growth
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
1997 (Engelska)Ingår i: Heredity, ISSN 0018-067X, Vol. 79, nr 2, s. 201-207Artikel i tidskrift (Refereegranskat) Published
Ort, förlag, år, upplaga, sidor
1997. Vol. 79, nr 2, s. 201-207
Identifikatorer
URN: urn:nbn:se:uu:diva-95197OAI: oai:DiVA.org:uu-95197DiVA, id: diva2:169319
Tillgänglig från: 2006-11-22 Skapad: 2006-11-22 Senast uppdaterad: 2009-03-31Bibliografiskt granskad
Ingår i avhandling
1. Life History of the Common Gull (Larus canus): A Long-Term Individual-Based Study
Öppna denna publikation i ny flik eller fönster >>Life History of the Common Gull (Larus canus): A Long-Term Individual-Based Study
2006 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

An individual’s life history is a sequence of events which eventually determine its contribution to the next generation, or fitness. These events are affected by environmental factors, genetic make-up and decisions made by an individual and its breeding partner. Recognition of these determinants helps to understand both short-term ecological changes and long-term evolutionary dynamics in a population. In this thesis long-term individual-based data on common gull (Larus canus) is used to study age-dependent reproductive success, survival, pair retention and breeding time. Collected pedigree data enabled to study genetic variation of traits and the selection on them.

The reproductive success of common gulls increased steadily until very old age. This increase cannot be explained by selection effects, since individuals with lower breeding success were shown not to have lower survival. Consequently, this gain must be ascribed primarily to an age-related improvements of individual competence and/or increased reproductive effort. Annual survival of adult birds was age- and year-dependent. The latter was partly explained by winter severity. The size of the white spots on five outermost primaries predicted the bird’s future survival and divorce probabilities and hence, pair endurance capability. Gulls with larger spots enjoyed higher survival and lower divorce rates compared to birds with smaller spots. This suggests that the wing tip pattern might function as a condition dependent signal, revealing individual variation in quality. One of the advantages of persistent pair bond was the ability to start breeding early in the season. The timing of breeding of firm pairs advanced with time not only due to mates’ increasing age, but also owing to their experience together. Although both sexes had phenotypic effects on laying date, it was heritable only in females. On the phenotypic and genotypic level, early laying was under positive fecundity and survival selection in females.

Ort, förlag, år, upplaga, sidor
Uppsala: Acta Universitatis Upsaliensis, 2006. s. 38
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 244
Nyckelord
Ecology, longitudinal studies, reproductive success, survival, pair bond, indicator trait, breeding time, heritability, selection, Ekologi, Larus canus
Forskningsämne
ekologisk botanik
Identifikatorer
urn:nbn:se:uu:diva-7350 (URN)91-554-6734-2 (ISBN)
Disputation
2006-12-14, Lindahlsalen, Evolutionary Biology Centre, Uppsala, 10:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2006-11-22 Skapad: 2006-11-22 Senast uppdaterad: 2009-03-31Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Av organisationen
Zooekologi

Sök vidare utanför DiVA

GoogleGoogle Scholar

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 514 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association
  • 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