A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä

Great tits lay increasingly smaller clutches than selected for: a study of climate- and density-related changes in reproductive traits




TekijätAhola MP, Laaksonen T, Eeva T, Lehikoinen E

KustantajaWILEY-BLACKWELL PUBLISHING, INC

Julkaisuvuosi2009

JournalJournal of Animal Ecology

Tietokannassa oleva lehden nimiJOURNAL OF ANIMAL ECOLOGY

Lehden akronyymiJ ANIM ECOL

Vuosikerta78

Numero6

Aloitussivu1298

Lopetussivu1306

Sivujen määrä9

ISSN0021-8790

DOIhttps://doi.org/10.1111/j.1365-2656.2009.01596.x


Tiivistelmä
5. We suggest that increasingly favourable conditions in winters have enhanced the survival and resulted in the observed increase in great tit breeding density. This may have most concerned young and otherwise low-quality individuals, which also most likely end up breeding in the increasingly occupied low-quality territories. This hypothesis was indicatively supported by increased within-year variation in both laying date and clutch size. The changes could also explain the lack of advancement in laying date as well as the increasing selection for large clutch sizes as the fittest individuals most likely occupy the best territories and lay largest clutches.



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