寄生蜂性别分配的年龄依赖性约束

IF 1.6 Q2 ENTOMOLOGY
T. Ueno
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引用次数: 6

摘要

寄生蜂的后代性别比往往取决于产卵雌蜂的年龄。生理上的限制,如精子枯竭和衰老是一个可能的原因。此外,母亲对女性年龄的控制可能是另一种解释。在这里,用瓣膜或腹尖运动来评估年龄依赖的性别比例是由于生理限制还是母体控制。将羽化时的后代性别比与腹尖运动预测的性别比进行了比较。当雌性相对年轻时,性别比例之间的差异很小。然而,随着雌蜂年龄的增长,羽化时的实际子代性别比比产卵时的预测性别比更偏向雄性。因此,性别比例之间存在不一致。奇怪的是,无论母亲的年龄如何,对男性卵子沉积持续运动的预测总是完美的;当雌性决定产卵时,检测到受精控制失败。因此,生理上的限制可能解释了日本种的女性年龄不一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Age-Dependent Constraints of Sex Allocation in a Parasitoid Wasp
The offspring sex ratios of parasitoid wasps often depend on the age of ovipositing females. Physiological constraints such as sperm depletion and senescence are a likely cause. Also, maternal control in response to female age may be an alternative explanation. Here valvifer or abdominal tip movements were used to assess whether age-dependent sex ratio was due to physiological constraints or maternal control with an ichneumonid wasp, Pimpla nipponica; the offspring sex ratio at the time of wasp emergence was compared with the sex ratio predicted from abdominal tip movements. When the female was relatively young, there was little difference between the sex ratios examined. However, as the age of the females increased, the realized offspring sex ratio at wasp emergence was more male-biased than the sex ratio predicted at the time of oviposition. Thus, there was an inconsistency between the sex ratios. Curiously, the predictions of continuous movements for male egg deposition were always perfect, regardless of maternal age; fertilization control failure was detected when the females had decided to lay female eggs. Thus, physiological constraints are a likely explanation for the inconsistency in relation to female age for P. nipponica.
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来源期刊
CiteScore
1.80
自引率
0.00%
发文量
8
审稿时长
15 weeks
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