Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly coloured yellow to red traits, which are pigmented by carotenoids, are relatively common in birds, and feature in sexual selection. Carotenoids have been linked to immune and antioxidant function, and the trade-off between ornamentation and these physiological functions provides a potential mechanism rendering carotenoid based signals costly. Mutual ornamentation is also common in birds and can be maintained by mutual mate choice for this ornament or by a correlated response in one sex to selection on the other sex. When selection pressures differ between the sexes this can cause intralocus sexual conflict. Sexually antagonistic selection press...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
<div><p>Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Bri...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
<div><p>Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Bri...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Sexual traits can serve as honest indicators of phenotypic quality when they are costly. Brightly co...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...
Male zebra finches display multiple secondary sexual traits such as song and red bill coloration. Th...