Male attractiveness and differential testosterone investment in zebra finch eggs

被引:419
作者
Gil, D [1 ]
Graves, J [1 ]
Hazon, N [1 ]
Wells, A [1 ]
机构
[1] Univ St Andrews, Sch Environm & Evolutionary Biol, St Andrews KY16 9TS, Fife, Scotland
关键词
D O I
10.1126/science.286.5437.126
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Good-genes hypotheses of sexual selection predict that offspring fathered by preferred males should have increased viability resulting from superior genetic quality. Several studies of birds have reported findings consistent with this prediction, but maternal effects are an important confounding variable. Those studies that have attempted to control for maternal effects have only considered differential maternal investment after egg laying. However, female birds differentially deposit testosterone in the eggs, and this influences the development of the chick. This study shows that female birds deposit higher amounts of testosterone and 5 alpha-dihydrotestosterone in their eggs when mated to more attractive males.
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收藏
页码:126 / 128
页数:3
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