Selection on personality in a songbird affects maternal hormone levels tuned to its effect on timing of reproduction
| Autor: | Ton G. G. Groothuis, Joe Lipar, Claudio Carere, Hubert Schwabl, Piet J. Drent |
|---|---|
| Přispěvatelé: | Groothuis lab, Animal Population Biology |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
food.ingredient
Time Factors media_common.quotation_subject YOLK ANDROGENS Zoology hatching asynchrony Biology PHENOTYPE Songbirds food Yolk TESTOSTERONE Animals TIT PARUS-MAJOR Selection Genetic Gonadal Steroid Hormones Selection (genetic algorithm) Testosterone media_common Ecology AVIAN PERSONALITIES EGGS fungi Maternal effect biology.organism_classification Agricultural and Biological Sciences (miscellaneous) Egg Yolk Brood EVOLUTION Songbird REALIZED HERITABILITY Oviparity maternal effects Female Reproduction General Agricultural and Biological Sciences laying date JAPANESE-QUAIL Corticosterone BEHAVIOR Research Article Personality |
| Zdroj: | Biology Letters, 4(5), 465-467. ROYAL SOC Biology Letters, 4(5), 465-467. Royal Society of London |
| ISSN: | 1744-9561 |
| Popis: | The increase or decrease in yolk androgens over the laying sequence of a clutch in birds may mitigate or enhance, respectively, the disadvantage of the last-hatched chicks, providing a potentially adaptive tool to adjust brood size to food conditions. This variation may involve a genetic component on which Darwinian selection can act. We found that two lines of a wild bird species selected for bold and shy personalities show, respectively, increased and decreased androgen concentrations over the laying sequence. The line showing the increase laid earlier in the season, when food conditions are normally sufficient to raise the whole brood. The line showing the decrease laid later, when food is normally scarce, which may facilitate brood reduction. The results indicate a correlated response in maternal hormone transfer to genetic selection on personality, which relates to ecological conditions. |
| Databáze: | OpenAIRE |
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