Adaptive egg size plasticity for larval competition and its limits in the seed beetle Callosobruchus chinensis
Adaptive egg size plasticity for larval competition and its limits in the seed beetle Callosobruchus chinensis
复制标题
种子甲虫幼虫竞争的适应性卵大小可塑性及其限制
DOI：
10.1111/eea.12088
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发表时间：
2013
影响因子：
1.9
通讯作者：
Tuda M
中科院分区：
文献类型：
--
作者：
Yanagi S.;Saeki Y.;Tuda M
生活史理论预测，经历过压力条件的雌性，如幼虫竞争或营养不良，应该增加对个体后代的投资，以增加后代的适应性（适应性父母假说）。相反，研究表明，当雌性在压力条件下饲养时，它们会变得更小，从而减少鸡蛋的大小（父母压力假设）。为了测试雌性是否根据幼虫竞争来调整其卵体积，而不受母体体重的限制，我们使用了一种储存的小豆害虫，Callosobruchus chinensis（L.）（鞘翅目：叶甲科：豆象亚科）。与竞争对手饲养的女性的鸡蛋比单独饲养的女性更小，支持父母的压力假设，然而，校正女性的身体大小，女性饲养的竞争对手产生更大的鸡蛋比那些饲养在没有竞争，支持自适应父母的假设，预测。雌性在压力环境中对每个后代的投资的表型可塑性抵消了个体大小对卵大小的限制。
Life‐history theory predicts that females who experienced stressful conditions, such as larval competition or malnutrition, should increase their investment in individual offspring to increase offspring fitness (the adaptive parental hypothesis). In contrast, it has been shown that when females were reared under stressful conditions, they become smaller, which consequently decreases egg size (the parental stress hypothesis). To test whether females adjust their egg volume depending on larval competition, independent of maternal body mass constraint, we used a pest species of stored adzuki beans,Callosobruchus chinensis(L.) (Coleoptera: Chrysomelidae: Bruchinae). The eggs of females reared with competitors were smaller than those of females reared alone, supporting the parental stress hypothesis; however, correcting for female body size, females reared with competitors produced larger eggs than those reared in the absence of competition, supporting the adaptive parental hypothesis, as predicted. The phenotypic plasticity in females' investment in each offspring in stressful environments counteracts the constraint of body size on egg size.