Sperm quality in the alternative reproductive tactics of Atlantic salmon: the importance of the loaded raffle mechanism
Sperm quality in the alternative reproductive tactics of Atlantic salmon: the importance of the loaded raffle mechanism
复制标题
大西洋鲑鱼替代繁殖策略中的精子质量：抽奖机制的重要性
DOI：
10.1098/rspb.2001.1768
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
T. Vladić
中科院分区：
文献类型：
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作者：
T. Vladić
在具有不同雄性生殖策略的物种中，精子竞争的结果可能由公平或负载抽奖机制决定。为了确定精子质量对雄性大西洋鲑鱼繁殖成功的相对重要性，研究了雄性大西洋鲑鱼在不同繁殖策略下的精子产量和质量。性成熟的雄性常驻伴侣每毫升射精产生更多的精子，并且以身体质量的百分比计算，它们在性腺上的投入也比雌雄同体多。与雌雄同体的雄性相比，雌雄同体的雄性具有更高的活动精子比例和更高的精子ATP含量。考虑到体型的影响后，雄性在精子质量和精子数量上的投入相对更多。在受精实验中，雌雄同体的雄性比雌雄同体的雄性受精率更高。一个多项式模型显示了睾丸质量和射精消耗之间的权衡，并解释了60%的变化。这些结果表明，在与优势雄性的精子竞争中，伴侣雄性可能通过产生生理上优越的精子来补偿行为上的从属地位。
The outcome of sperm competition in species with alternative male reproductive strategies may be determined by fair or loaded raffle mechanisms. The sperm production and quality of male Atlantic salmon using alternative reproductive tactics were investigated in order to determine the relative importance of sperm quality for male reproductive success. Sexually mature resident parr males produced greater numbers of spermatozoa per millilitre of ejaculate and invested more in their gonads as a percentage of body mass than their anadromous counterparts. Parr males had greater proportions of motile spermatozoa and a greater sperm ATP content as compared with anadromous males. Parr males invested relatively more in sperm quality and sperm numbers after the effect of body size was accounted for. In fertilization experiments, parr males fertilized greater proportions of eggs than anadromous males. A polynomial model exhibited a trade-off between testes mass and ejaculate expenditure and explained 60% of the variation. These results establish that, in sperm competition with dominant males, parr males may compensate for behavioural subordinance by producing physiologically superior spermatozoa.
Salmo gairdneri 外臂动力蛋白的纯化和表征。
影响因子：
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作者：
Moss,AG;Gatti,JL;King,SM;Witman,GB
通讯作者：
Witman,GB