Opposing effects of heat stress on male versus female reproductive success in Bicyclus anynana butterflies
Opposing effects of heat stress on male versus female reproductive success in Bicyclus anynana butterflies
复制标题
DOI：
10.1016/j.jtherbio.2011.04.001
复制
发表时间：
2011-07-01
影响因子：
2.7
通讯作者：
Fischer, Klaus
中科院分区：
文献类型：
--
作者：
Janowitz, Susann A.;Fischer, Klaus
在变温生物中，繁殖成功和生存受到温度的重要影响。在这里，我们分析了短时间暴露于热应激（1小时，在40摄氏度与对照组）对Bicyclus anynana蝴蝶的繁殖成功和寿命的影响。在施加热应激或对照处理后，通过处理组合在所有四种可能的性别中交配个体。热暴露的女性造成随后的寿命，繁殖力，鸡蛋大小和伴随生殖投资减少。热暴露的男性也减少寿命，但一般来说，对繁殖的女性配偶的影响不大。然而，女性与热应激男性交配表现出令人惊讶的增加，而不是减少早期繁殖力，这可能表明在当前的繁殖压力环境中增加投资。热应激对卵孵化成功率、交配时间和交配持续时间无显著影响。我们的研究结果表明，短时间的热应激可能会大大减少寿命和生殖输出，性别之间存在显着差异。我们发现没有证据表明男性比女性更受热应激的影响。(C)2011爱思唯尔有限公司保留所有权利。
In ectothermic organisms, reproductive success and survival are vitally affected by temperature. Here, we analyzed the effects of a short-time exposure to heat stress (1 h at 40 degrees C versus controls) on reproductive success and longevity in Bicyclus anynana butterflies. After having applied heat stress or a control treatment, individuals were mated in all four possible sexes by treatment combinations. Heat exposure of females caused a subsequent reduction in longevity, fecundity, egg size and concomitantly reproductive investment. Heat exposure of males also reduced longevity, but had in general little effect on the reproduction of female mates. However, females having mated with heat-stressed males showed surprisingly an increased rather than decreased early fecundity, which may indicate an increased investment in current reproduction in stressful environments. Heat stress had no significant effect on egg hatching success, time to copulation and copulation duration. Our results suggest that a short period of heat stress may substantially reduce longevity and reproductive output, with striking differences among sexes. We found no evidence for males being more strongly affected by heat stress than females. (C) 2011 Elsevier Ltd. All rights reserved.