Costs of intersexual conflict in the isopod Idotea baltica
Costs of intersexual conflict in the isopod Idotea baltica
复制标题
等足类动物 Idotea baltica 中两性冲突的代价
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
J. Riihimäki
中科院分区：
文献类型：
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作者：
V. Jormalainen;S. Merilaita;J. Riihimäki
在有性生殖中，一种性别可以以牺牲另一种性别为代价来增加其生殖成功率，这种情况被称为性间冲突。在海洋等足类动物中，雄性波罗的海伊杜茶在交配前保护雌性。守卫阶段之前是女性抵抗男性试图发起守卫的斗争。我们确定了斗争和/或交配守卫是否会以降低繁殖力和降低能量储存化合物、糖原和脂质水平的形式导致健身成本。与单独维持的雌性相比，经历了与雄性斗争时期的雌性糖原水平降低。男性没有发现这种成本。被雄性看守的雌性也比没有看守的雌性有更小的卵。因此，由雄性的适应度最大化策略所施加的性间冲突，对雌性来说既产生了繁殖力成本，又产生了能量成本。繁殖力成本证实了I性别冲突的存在。波罗的海。这一成本由男性分担，表明性间冲突抑制了两性的生殖产出。
In sexual reproduction one sex can increase its reproductive success at the cost of the other, a situation known as intersexual conflict. In the marine isopod Idotea baltica, males guard females before copulation. The guarding phase is preceded by struggles as females resist males’ attempts to initiate guarding. We determined whether the struggle and/or mate‐guarding result in fitness costs in the form of decreasing fecundity and lower levels of the energy storage compounds, glycogen and lipids. Females that underwent the period of struggles with males had decreased glycogen levels compared with females maintained alone. No such cost was found for males. Females guarded by a male also had smaller eggs than females that were not guarded. Thus the intersexual conflict, imposed by the fitness maximization strategy of the males, gave rise to both a fecundity cost and an energetic cost for females. The fecundity cost confirms the existence of intersexual conflict in I. baltica. This cost is shared by males, suggesting that the intersexual conflict restrains the reproductive output of both sexes.