Abstract

Testosterone and corticosterone are steroid hormones that regulate various aspects of bird behavior. The dynamics of blood level of these hormones depending on the stage of the life cycle have been studied in many species. It has been shown for both sexes that the levels of both hormones rise during the breeding season. We have studied changes in the level of these hormones in the northern goshawk (Accipiter gentilis) during a year. This has been the first study of this type on northern goshawk. We collected blood samples from 16 adult northern goshawks kept in pairs in aviaries in the VITASFERA Rare Bird Species Breeding Center. The testosterone level rises in males during the period of lekking and mating (March–June); however, there is no synchronous increase in females. The corticosterone level generally remains high throughout the year in both sexes. Since these are the only data on the northern goshawk, it cannot be concluded whether this is characteristic of the species as a whole or only for captive birds.

中文翻译：

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北部苍鹰（Accipiter gentilis）所例证的掠食性鸟类中睾丸激素和皮质酮的季节性变化。

摘要

睾丸激素和皮质酮是类固醇激素，可调节鸟类行为的各个方面。这些激素的血液动力学取决于生命周期的阶段，已经在许多物种中进行了研究。已经证明，在繁殖季节，两种激素的水平都会升高。我们研究了北方苍鹰（Accipiter gentilis）中这些激素水平的变化）。这是对北方苍鹰的首次此类研究。我们从VITASFERA稀有鸟类物种繁育中心的成对成对的16只成年北方苍鹰中采集了血液样本。男性在韭菜交配期间睾丸激素水平升高（3月至6月）；但是，女性并没有同步增长。男女中的皮质酮水平通常全年都很高。由于这些是北部苍鹰的唯一数据，因此无法断定这是整个物种的特征还是仅是圈养鸟类的特征。