Lining the nest with more feathers increases offspring recruitment probability: Selection on an extended phenotype in the blue tit,Ecology and Evolution

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Lining the nest with more feathers increases offspring recruitment probability: Selection on an extended phenotype in the blue tit
Ecology and Evolution ( IF 2.3 ) Pub Date : 2020-10-22 , DOI: 10.1002/ece3.6931
Pauliina Järvinen ₁ , Jon E Brommer _{1,

2}

Affiliation

Birds, among various other taxa, construct nests. Nests form an extended phenotype of the individual building it. Nests are used to extend control over the conditions in which offspring develop, and are therefore commonly considered to be shaped by selection. Nevertheless, scarcely any scientific evidence exist that nest composition is under selection. Here, we demonstrate with data from over 400 blue tit (Cyanistes caeruleus) nests collected over 8 years that a higher proportion of feathers in the nest lining is positively associated with the probability of offspring to recruit as a breeding adult later in life. Strikingly, the extended phenotype (nest) was associated stronger with recruitment probability than phenotypic traits that have typically been considered important in selection (laying date, and female size and condition). Our findings suggest that the choice of nest material could be a maternal behavior with potential lifelong effects on her offspring.

中文翻译：

用更多的羽毛衬托巢穴可以增加后代招募的可能性：蓝山雀扩展表型的选择

鸟类和其他各种类群一样，会筑巢。巢形成了建造它的个体的延伸表型。巢穴用于扩大对后代发育条件的控制，因此通常被认为是通过选择而形成的。然而，几乎没有任何科学证据表明巢穴的组成是受到选择的。在这里，我们通过 8 年来收集的 400 多个蓝山雀 ( Cyanistes caeruleus ) 巢穴的数据证明，巢穴内衬中羽毛的比例越高，与后代在以后成为繁殖成年鸟的可能性呈正相关。引人注目的是，与通常被认为对选择很重要的表型性状（产蛋日期、雌性体型和状况）相比，扩展表型（巢）与招募概率的相关性更强。我们的研究结果表明，巢穴材料的选择可能是一种母性行为，可能对其后代产生终生影响。

更新日期：2020-12-03

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