Egg and cluster size in ladybird beetles (Coleoptera: Coccinellidae): The direct and indirect effects of aphid abundance
Egg and cluster size in ladybird beetles (Coleoptera: Coccinellidae): The direct and indirect effects of aphid abundance
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发表时间：
2013
影响因子：
1.3
通讯作者：
A. Dixon;Y. Q. Guo
中科院分区：
文献类型：
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作者：
A. Dixon;Y. Q. Guo
七星瓢虫幼虫和成虫的食物胁迫。导致单位时间内产蛋率和蛋群大小的变化，但不影响蛋的大小。这支持的建议，鸡蛋大小的限制，在第一龄幼虫可以捕获活跃的猎物和/或完成他们的发展猎物变得稀缺之前的最小尺寸。当食物过剩时，大型甲虫比小型甲虫产下更多的卵。这与大型雌性比小型雌性在性腺中具有更多的卵巢管有关。由于产生幼虫的卵的比例对于6至60个卵的集群保持不变，就增加的扩散前同胞同类相食而言，产下更大的卵集群似乎没有成本。
Food stress experienced during larval and adult life in Coccinella septempunctata L. results in variation in the rate of production of eggs per unit time and in the size of egg clusters but not in egg size. This lends support to the suggestion that egg size is constrained by the minimum size at which first instar larvae can capture active prey and/or complete their development before prey become scarce. When supplied with an excess of food large beetles produce larger clusters of eggs than small beetles. This is associated with the large females having more ovarioles in their gonads than small females. As the proportion of eggs that give rise to larvae remains the same for clusters of from 6 to 60 eggs there appear to be no costs, in terms of increased predispersal sibling cannibalism, to laying larger clusters of eggs.