Female size constrains egg size via the influence of reproductive organ size and resource storage in the seed beetle Callosobruchus chinensis
Female size constrains egg size via the influence of reproductive organ size and resource storage in the seed beetle Callosobruchus chinensis
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雌性体型通过种子甲虫 Callosobchus chinensis 生殖器官大小和资源储存的影响来限制卵的大小
DOI：
10.1016/j.jinsphys.2012.08.007
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发表时间：
2012
影响因子：
2.2
通讯作者：
Tuda M
中科院分区：
文献类型：
--
作者：
Yanagi S;Tuda M
标准的蛋大小模型预测，在给定的环境中，母亲产下的蛋的大小是最佳的。然而，有证据表明，体型较大的雌性在不同的动物类群中产卵较大。这种正相关关系表明，卵子在产卵期间通过的母体器官的大小对卵子大小有形态上的限制。也有证据表明，拥有更多资本资源的体型较大的母亲会产生较大的卵子。我们使用近交系的种子甲虫，测试了形态机制(产卵器宽度)或生理机制(母体体重作为资本来源的衡量标准)是否限制了卵的大小。此外，我们还测试了在产卵方面，拥有一个相对于身体大小较宽的产卵器是否代价高昂。产卵器宽度增加，卵宽增加，而不是长度增加。卵的长度和宽度随着体重的增加而增加。没有检测到更宽的产卵器的成本。我们得出结论：在形态约束下，雌性个体的卵子大小依赖于资本资源水平。
The standard egg size model predicts that a mother lays an optimal size of eggs in a given environment. However, there is evidence that larger females lay larger eggs across diverse animal taxa. This positive correlation suggests there are morphological constraints on egg size imposed by the size of the maternal organ through which eggs pass during oviposition. There is also evidence that large mothers that have greater capital resources produce large eggs. We tested whether morphological (ovipositor width) or physiological (maternal body weight as a measure of capital resources) mechanisms constrain egg size, using an inbred line of seed beetles, Callosobruchus chinensis. In addition, we tested whether having a wide ovipositor relative to body size is costly in terms of egg production. Egg width but not length increased with ovipositor width. Egg length and width increased with body weight. The cost of wider ovipositor was not detected. We conclude that females adjust egg size depending on capital resource level under the morphological constraint.