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首页> 外文期刊>Journal of Fish Biology >No evidence for adjustment of maternal investment under alternative mate availability regimes
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No evidence for adjustment of maternal investment under alternative mate availability regimes

机译：没有证据表明在其他择偶条件下可以调整产妇投资

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摘要

Using treatments that mimic high and low availability of reproductive males, it was found that female three-spined sticklebacks Gasterosteus aculeatus, previously shown to adjust their mate choices when male mates were rare, did not alter their reproductive investment strategies. These results suggest that plasticity in investment is perhaps limited by physiological requirements or dependent on relatively extreme mate availability regimes. The probability of becoming reproductive, number of clutches per season (per female), initial clutch size and mass and the timing of reproduction were all independent of the experience a female had with mate availability. This suggests that pre-copulatory plasticity in reproductive strategies may contribute more to variation in the strength and direction of sexual selection than reproductive investment in offspring.
机译：使用模仿生殖雄性的高和低利用率的治疗方法，发现雌性三棘刺背G Gasterosteus aculeatus以前显示出在雄性伴侣很少的情况下会调整其伴侣选择，但它们并没有改变其生殖投资策略。这些结果表明，投资的可塑性可能受到生理要求的限制，或者取决于相对极端的配偶供应状况。繁殖的可能性，每个季节（每个雌性）的离合器数量，初始离合器的大小和质量以及繁殖时间均与雌性有配偶的经历无关。这表明生殖策略中交配前的可塑性可能比后代的生殖投资对性选择的强度和方向的变化贡献更大。

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