Yolk androgens affect offspring hatching, begging, growth and survival in many bird species. If these effects are sex-specific, yolk androgen deposition may constitute a mechanism for differential investment in male and female offspring. We tested this hypothesis in zebra finches. In this species, females increase yolk-testosterone levels and produce male-biased sex ratios when paired to more attractive males. We therefore predicted that especially sons benefit from elevated yolk androgens. Eggs were injected with testosterone or sesame oil (controls) after 2 days of incubation.Testosterone had no clear effect on sex-specific embryonic mortality and changed the pattern of early nestling mortality independent of offspring sex. Testosterone-t...
Mates and females are in conflict over parental care, as it would be favourable for one parent to sh...
Females are predicted to adjust their reproductive investment in relation to resource quality. In ze...
1. During early development male offspring in avian species often suffer from enhanced mortality com...
Yolk androgens affect offspring hatching, begging, growth and survival in many bird species. If thes...
Female birds incorporate in the yolks of their eggs significant concentrations of a number of differ...
The Trivers - Willard hypothesis predicts sex biases in parental investment according to parental co...
Maternal yolk androgens in avian eggs have been shown to affect numerous offspring traits. These cha...
Yolk androgen deposition is a widely investigated maternal effect in birds, but its adaptive value i...
Parents are selected to preferentially invest in the offspring with highest reproductive value. One ...
Maternal yolk androgens in avian eggs have been shown to affect numerous offspring traits. These cha...
The differential allocation hypothesis predicts that females invest more resources into reproduction...
Boncoraglio G, Groothuis TGG, von Engelhardt N. Differential Maternal Testosterone Allocation among ...
Maternal allocation of androgens to the egg yolk allows mothers to adaptively manipulate offspring p...
Mates and females are in conflict over parental care, as it would be favourable for one parent to sh...
Females are predicted to adjust their reproductive investment in relation to resource quality. In ze...
1. During early development male offspring in avian species often suffer from enhanced mortality com...
Yolk androgens affect offspring hatching, begging, growth and survival in many bird species. If thes...
Female birds incorporate in the yolks of their eggs significant concentrations of a number of differ...
The Trivers - Willard hypothesis predicts sex biases in parental investment according to parental co...
Maternal yolk androgens in avian eggs have been shown to affect numerous offspring traits. These cha...
Yolk androgen deposition is a widely investigated maternal effect in birds, but its adaptive value i...
Parents are selected to preferentially invest in the offspring with highest reproductive value. One ...
Maternal yolk androgens in avian eggs have been shown to affect numerous offspring traits. These cha...
The differential allocation hypothesis predicts that females invest more resources into reproduction...
Boncoraglio G, Groothuis TGG, von Engelhardt N. Differential Maternal Testosterone Allocation among ...
Maternal allocation of androgens to the egg yolk allows mothers to adaptively manipulate offspring p...
Mates and females are in conflict over parental care, as it would be favourable for one parent to sh...
Females are predicted to adjust their reproductive investment in relation to resource quality. In ze...
1. During early development male offspring in avian species often suffer from enhanced mortality com...