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首页> 外文期刊>Journal of Avian Biology >Do different yolk androgens exert similar effects on the morphology or behaviour of Japanese quail hatchlings Coturnix japonica?
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Do different yolk androgens exert similar effects on the morphology or behaviour of Japanese quail hatchlings Coturnix japonica?

机译：不同的卵黄雄激素是否会对日本鹌鹑幼体Coturnix japonica的形态或行为产生相似的影响？

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摘要

Avian eggs contain variable levels of several maternal androgens that may all be important in adjusting offspring phenotype at the individual or brood level. Most studies have focused on experimental manipulations of testosterone (T), and the other yolk androgens such as androstenedione (A(4)) and 5-alpha-dihydrotestosterone (DHT) were so far neglected. However, in species where the amount of A(4) in the yolk much exceeds that of the other androgens, A(4) could represent the dominant agent of androgen-mediated maternal effects, in which case manipulations of T would be misdirected. We conducted our study in a species with high yolk A(4) and relatively low T and DHT levels, the Japanese quail Coturnix japonica. We injected unincubated eggs with a physiological dose of either A(4), T, or DHT, and measured hatchling growth, as well as behaviour in an open field test. T treatment non-significantly increased social reinstatement behaviour in the open field test, but it seemed to significantly suppress early skeletal growth and mass gain. The A(4) and DHT treatments, in contrast, significantly increased reinstatement behaviour, but did not affect mass and size growth. These results suggest that future investigations should view yolk androgens as integrated components of the complex yolk steroid environment.
机译：禽蛋中含有几种不同水平的母体雄激素，这可能对调节个体或育雏水平的后代表型很重要。大多数研究都集中在睾丸激素（T）的实验操作上，到目前为止，其他卵黄雄激素，例如雄烯二酮（A（4））和5-α-二氢睾酮（DHT）都被忽略了。但是，在蛋黄中A（4）的数量远远超过其他雄激素的物种中，A（4）可能代表雄激素介导的母体效应的主导因素，在这种情况下，对T的操纵将被误导。我们对蛋黄A（4）高，T和DHT水平相对较低的物种日本鹌鹑Coturnix japonica进行了研究。我们用生理剂量的A（4），T或DHT注射未孵化的卵，并在孵化场中测试了孵化的生长以及行为。在野外试验中，T治疗无明显增加社交恢复行为，但似乎可以显着抑制早期骨骼生长和质量增加。相比之下，A（4）和DHT处理可显着增加恢复行为，但不影响质量和大小的增长。这些结果表明，未来的研究应将蛋黄雄激素视为复杂的蛋黄类固醇环境的组成部分。

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