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首页> 外文期刊>Behavioral Ecology and Sociobiology >Differential deposition of antimicrobial proteins in blue tit (Cyanistes caeruleus) clutches by laying order and male attractiveness
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Differential deposition of antimicrobial proteins in blue tit (Cyanistes caeruleus) clutches by laying order and male attractiveness

机译：通过放置顺序和雄性吸引力在蓝山雀（Cyanistes caeruleus）离合器中抗菌蛋白的差异沉积

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摘要

Female birds can influence offspring fitness by varying the relative quantities of egg components they deposit within and between clutches. Antimicrobial proteins (lysozyme, ovotransferrin, and avidin) are significant components of the avian albumen and likely aid in defense of embryos from microbial infection. Within clutches, females may enhance antimicrobial defense of early-laid eggs to protect them from the high risk of infection incurred before the onset of incubation. Among entire clutches, females may invest more resources in young sired by more attractive males because they have higher reproductive value. We tested these hypotheses by quantifying antimicrobial protein distribution within and among clutches in blue tit eggs. Contrary to our hypothesis, clutches showed no differential deposition of lysozyme or avidin within clutches, but eggs laid in the middle of the sequence had higher concentrations of ovotransferrin than eggs in the beginning and end. Consistent with our second hypothesis, we found that females produced eggs with higher concentrations of lysozyme (although not ovotransferrin or avidin) when mated to more attractive (more UV-reflective) males. Furthermore, females mated to polygynous males deposited less lysozyme than those mated to monogamous males. These data suggest that allocation of lysozyme at the clutch level may be a maternal effect mediated by male qualities.
机译：雌鸟可以通过改变它们在离合器内和离合器之间沉积的卵成分的相对数量来影响后代的适应性。抗菌蛋白（溶菌酶，卵转铁蛋白和抗生物素蛋白）是禽蛋白的重要组成部分，可能有助于防御受微生物感染的胚胎。在离合器内，雌性可能增强早产卵的抗菌防御能力，以保护它们免受在孵化开始之前发生感染的高风险。在整个离合器中，雌性可能会向更具吸引力的雄性所生的幼仔投资更多的资源，因为它们具有较高的繁殖价值。我们通过定量蓝山雀卵中各离合器内部和之间的抗菌蛋白分布来检验这些假设。与我们的假设相反，离合器在离合器中未显示溶菌酶或抗生物素蛋白的差异沉积，但序列中间产卵的卵中转铁蛋白的浓度高于开始和结束时的卵。与我们的第二个假设一致，我们发现当与更有吸引力（对紫外线更具反射性）的雄性交配时，雌性产生的卵中溶菌酶的浓度较高（尽管不是卵转铁蛋白或亲和素的卵）。而且，与一夫多妻的雄性交配的雌性比一夫一妻制的雄性交配的溶菌酶少。这些数据表明溶菌酶在离合器水平的分配可能是男性素质介导的母体效应。

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