On the Issue of the Primary Sex Ratio in the Pied Flycatcher (Ficedula hypoleuca)

IF 1 4区环境科学与生态学 Q4 ECOLOGY

Russian Journal of Ecology Pub Date : 2024-05-07 DOI:10.1134/s1067413624020012

A. V. Artemyev, V. N. Veprintsev, N. A. Karpechenko

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Abstract

An assessment of the primary sex ratio in the local pied flycatcher population in South Karelia (Russia) is given, and its variations in broods depending on breeding characteristics and characteristics of the parents are analyzed. The proportion of males in 30 clutches examined in 2012 did not differ from the proportion of females and amounted to 50.8% of the total number of eggs laid (n = 199), although it varied from 14.3% to 85.7% in individual nests. A weak positive correlation between the proportion of males in the brood and the timing of breeding and the ornamentation of the feathers that form the white spot on the male’s wing (the first tertiary and the 5–6th upper greater coverts of the secondary feathers), and a negative correlation with the length of the wing and the third primary feather of the female were shown. Analysis using generalized linear models showed a significant relationship of the primary sex ratio in the brood only with the length of the female’s third primary feather. Possible mechanisms of changes in the sex ratio in broods are discussed.

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关于灰背隼的初级性别比例问题

摘要对南卡累利阿（俄罗斯）当地斑背飞燕种群的主要性别比例进行了评估，并分析了根据繁殖特征和亲鸟特征，其在窝中的变化情况。在2012年考察的30窝卵中，雄性比例与雌性比例没有差异，雄性占产卵总数的50.8%（n = 199），但在个别巢中雄性比例从14.3%到85.7%不等。雄鸟在雏鸟中的比例与繁殖时间和雄鸟翅膀上形成白斑的羽毛（第一三级羽毛和第二级羽毛的第5-6个上大覆羽）的装饰性之间存在微弱的正相关，与雌鸟翅膀的长度和第三根初级羽毛之间存在负相关。利用广义线性模型进行的分析表明，只有雌鸟第三根初级羽毛的长度与雏鸟的初级性别比有显著关系。讨论了雏鸟性别比变化的可能机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Russian Journal of Ecology 环境科学-生态学

CiteScore

1.50

自引率

18.20%

发文量

审稿时长

6 months

期刊介绍： The Russian Journal of Ecology publishes completed original studies in all branches of theoretical and experimental ecology, reviews, articles on topics currently in debate, and information on new methods of research.