Sexual conflict and the energetic costs of mating and mate choice in water striders
Sexual conflict and the energetic costs of mating and mate choice in water striders
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DOI：
10.1086/286101
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发表时间：
1998-01-01
影响因子：
2.9
通讯作者：
Stallmann, RR
中科院分区：
文献类型：
--
作者：
Watson, PJ;Arnqvist, G;Stallmann, RR
对求爱、交配或配偶保护的两性利益冲突的分析需要了解性互动的生理成本。重复呼吸测量能量消耗的女性宝瓶座remigis，而空载，而携带交配男性，一个小的金属重量，或安乐死的男性。空载“巡航”运动消耗的能量平均为334.6 μ W（82 J kg（-1）m（-1））;这一运动成本的估计值与类似质量的节肢动物自愿游动的测量值一致，代表了在水面上滑冰的第一个能量测量值。携带男性或金属重物的巡航女性消耗的能量分别比空载女性多24%和28%。女性从事“逃跑”运动消耗43%以上的能量，而携带男性比，而空载。此外，我们的研究表明，交配前的斗争，因此选择性交配的决定，是精力消耗。挣扎的女性消耗的平均936.6亩W，增加126%，巡航相比，非挣扎的女性，64%以上的交配女性从事逃避运动。我们开发了一个定量模型，表明在一定的骚扰率阈值，接受多余的交配成为“最好的坏工作”的女性。
Analyses of intersexual conflicts of interest over courtship, mating, or mate guarding require an understanding of the physiological costs of sexual interaction. Repeated respirometric measures of energetic expenditure were taken on female Aquarius remigis while unladen and while carrying a mating male, a small metal weight, or a euthanized male. Unladen "cruising" locomotion consumed an average of 334.6 mu W of energy (82 J kg(-1) m(-1)); this estimate of the cost of locomotion coincides with measures from voluntarily locomoting arthropods of similar mass and represents the first energetic measure of skating on a water surface. Cruising females carrying males or metal weights consumed 24% and 28% more energy than unladen females, respectively. Females engaged in "escape" locomotion consumed 43% more energy while carrying a male than while unladen. Further, our study shows that premating struggles, and therefore selective mating decisions, are energetically costly. Struggling females consumed an average of 936.6 mu W, a 126% increase compared to cruising, non-struggling females, and 64% more than mating females engaged in escape locomotion. We develop a quantitative model showing that at a certain harassment rate threshold, accepting superfluous matings becomes the "best of a bad job" for females.