Long-term monitoring of dwarf eggs in clutches of Yellow-legged Gulls (Larus michahellis) breeding in a western Mediterranean colony

IF 1.3 4区 生物学 Q2 Agricultural and Biological Sciences Journal of Ornithology Pub Date : 2024-05-10 DOI:10.1007/s10336-024-02179-8
Marc Bosch
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Abstract

The present study provides data on clutches with dwarf eggs from a large sampling in a colony of Yellow-legged Gulls (Larus michahellis) over 31 years. Their occurrence was very low, with a global percentage of 0.26%. Significant variations were not detected among periods of 10 or 11 years. In all the cases, only one dwarf egg was found per clutch. Mean volume of dwarf eggs was 34% of that of non-dwarf eggs. Their content was mostly albumen and a very reduced quantity of yolk, and they were infertile. Several results of the study (the laying order of the dwarf eggs, their mean clutch size and the mean size of the non-dwarf eggs from clutches with dwarf eggs) support the hypotheses that runt eggs occur from a temporary disturbance to the reproductive tract.

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对地中海西部一个黄腿鸥群落中繁殖的黄腿鸥(Larus michahellis)的侏儒卵进行长期监测
本研究提供了31年来在黄腿鸥(Larus michahellis)群落中大量抽样调查的侏儒卵的数据。它们的出现率非常低,总体比例为 0.26%。在 10 年或 11 年期间没有发现明显的变化。在所有情况下,每窝仅发现一枚侏儒蛋。侏儒蛋的平均体积是非侏儒蛋的 34%。它们的成分主要是蛋白和极少量的蛋黄,而且不能生育。该研究的几项结果(侏儒蛋的产卵顺序、平均一窝卵的大小以及带有侏儒蛋的一窝卵中非侏儒蛋的平均大小)支持侏儒蛋是由于生殖道受到暂时性干扰而产生的这一假设。
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来源期刊
Journal of Ornithology
Journal of Ornithology 生物-鸟类学
自引率
7.70%
发文量
0
审稿时长
3-8 weeks
期刊介绍: The Journal of Ornithology (formerly Journal für Ornithologie) is the official journal of the German Ornithologists'' Society (http://www.do-g.de/ ) and has been the Society´s periodical since 1853, making it the oldest still existing ornithological journal worldwide.
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