Cost of oviposition site selection in a water strider Aquarius paludum insularis: Egg mortality increases with oviposition depth
Cost of oviposition site selection in a water strider Aquarius paludum insularis: Egg mortality increases with oviposition depth
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DOI：
10.1016/j.jinsphys.2010.01.011
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发表时间：
2010-06-01
影响因子：
2.2
通讯作者：
Kasuya, Eiiti
中科院分区：
文献类型：
--
作者：
Hirayama, Hiroyuki;Kasuya, Eiiti
雌性通常避免选择具有高捕食风险的产卵地点，以增加后代的存活率。以前的研究集中在产卵雌性的成本上。然而，虽然后代也可能产生成本，产卵在低捕食风险的网站，没有研究集中在成本的后代。这种成本的后代进行了检查，使用宝瓶座paludum insularis，女性避免卵寄生产卵在深网站。深网站是安全的卵寄生，但可能不适合孵化，由于环境因素。我们研究了成本的后代在深站点通过比较孵化率，孵化的持续时间和淹死的幼虫之间的蛋，设置在三个水平的水深（0厘米，25厘米和50厘米深）的比例。50 cm处的孵化率低于0 cm处，而25 cm处的孵化率与0 cm处无显著差异。孵化的持续时间和溺水幼虫的比例在三个深度之间没有差异。提示，A.沼泽卵是由于更深处的水压增加所致。这样的成本可能存在于其他物种，这样的观察可能有助于了解产卵地点的选择。(C)2010爱思唯尔有限公司版权所有。
Females generally avoid selecting sites for oviposition which have a high predation risk to increase offspring survival. Previous studies have focused on costs to ovipositing females. However, although offspring may also incur costs by being oviposited at low predation risk sites, no studies have focused on costs to offspring. Such costs to offspring were examined by using Aquarius paludum insularis, females of which avoid eggs parasitism by ovipositing at deep sites. Deep sites are safe from egg parasitism but may be unsuitable for hatching due to environmental factors. We examined the costs to offspring at deep sites by comparing the hatching rate, the duration to hatching and the proportion of drowned larvae between eggs that were set at three levels of water depth (0 cm, 25 cm and 50 cm depth). While the hatching rate at 50 cm was lower than that at 0 cm, the rate at 25 cm did not differ from that at 0 cm. Duration to hatching and the proportion of drowned larvae did not differ between the three depths. It is suggested that the declining survival rate of A. paludum eggs was due to increased water pressure at greater depth. Such a cost may exist in other species and such an observation may aid in understanding oviposition site selection. (C) 2010 Elsevier Ltd. All rights reserved.