The shape of eggs in different-sized clutches of the house wren (Troglodytes aedon)
The shape of eggs in different-sized clutches of the house wren (Troglodytes aedon)
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家鹪鹩 (Troglodytes aedon) 不同大小的窝中的蛋的形状
DOI：
10.1139/z01-099
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发表时间：
2001
影响因子：
1.4
通讯作者：
C. Werner
中科院分区：
文献类型：
--
作者：
L. Johnson;Jennifer E. Leyhe;C. Werner
鸟蛋的形状在种间和种内发生的巨大变化在很大程度上仍然无法解释。一些研究人员假设，选择会倾向于一种形状，这种形状会导致孵化中的父母最紧凑的鸡蛋。数学模型表明，最佳的鸡蛋形状取决于产卵的数量。我们通过比较美国怀俄明州的一窝4、5、6、7和8个鸡蛋中鸡蛋的形状，测试了一个先前发表的模型的预测，家鹪鹩的种群（穴居鹪鹩属），一种在洞穴中筑巢的小型鸣禽，其卵的形状变化很大。与模型的预测相反，来自不同大小窝卵的典型形状非常相似。此外，检测到的形状上的微小差异不在模型预测的方向上。可能有较少的选择对家弗伦斯，以调整蛋的形状，以离合器的大小，因为他们产卵是小相对于女性的身体大小，因为鸡蛋被放置在一个深的S。
The substantial inter- and intra-specific variation that occurs in the shape of birds' eggs remains largely unexplained. Several researchers have hypothesized that selection will favour a shape that results in the most compact fit of eggs under the incubating parent. Mathematical modeling has suggested that optimal egg shape depends on the number of eggs laid. We tested predictions of one previously published model by comparing the shape of eggs in clutches of 4, 5, 6, 7, and 8 eggs in a Wyoming, U.S.A., population of the house wren (Troglodytes aedon), a small, cavity-nesting songbird whose eggs vary considerably in shape. Contrary to predictions of the model, the typical shapes of eggs from different-sized clutches were very similar. Moreover, slight differences in shape detected were not in directions predicted by the model. There may be less selection on house wrens to adjust egg shape to clutch size because they lay eggs that are small relative to female body size, because eggs are placed in a deep s...