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首页> 外文会议>TCS Summer Meeting >THE EFFECT OF MALE SIZE AND SPERMATOPHORE CHARACTERISTICS ON REPRODUCTION IN THE CARIBBEAN SPINY LOBSTER,PANULIRUS ARGUS
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THE EFFECT OF MALE SIZE AND SPERMATOPHORE CHARACTERISTICS ON REPRODUCTION IN THE CARIBBEAN SPINY LOBSTER,PANULIRUS ARGUS

机译：男性尺寸和精子特征对加勒比刺龙虾繁殖的效果，Panulirus argus

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The average size of spiny lobsters (Decapoda; Palinuridae) has decreased dramatically worldwide as a result of the over-fishing of large individuals. Average male size is usually diminished more than that of females because of sexual dimorphism and this can impact reproductive success through sperm limitation. Using laboratory mating experiments and field comparisons of fished and unfished populations, we studied differences in spermatophore characteristics that may influence reproductive success in the Caribbean spiny lobster, Panulirus argus, in the Florida Keys, Florida (U.S.A.). We found that large males produce larger spermatophores with more sperm, resulting in operational sperm:egg ratios (range:21-37:1) that were 40% lower in fished areas. Our experiments show that female mating receptivity is suspended upon receipt of a spermatophore and that this behavior is controlled by a combination of chemical and physical stimuli provided by the spermatophore. The distribution of sperm within spermatophores indicates that the fertilization of multiple clutches from one spermatophore is unlikely, as confirmed by laboratory observations. These results highlight the importance of spermatophore characteristics on fertilization success in spiny lobsters and suggest that reduced male size in the wild may limit reproductive success.
机译：由于大型人的过度捕捞，多刺龙虾（Decapoda; Palinuridae）的平均大小在全球范围内急剧下降。平均男性尺寸通常比性别二态性（因为性别二态）在女性中逐渐减少，这会通过精子限制影响生殖成功。使用实验室交配实验和捕捞群体的实地比较，研究了佛罗里达州佛罗里达群岛（U.S.）的加勒比刺龙虾，Panulirus Argus的生殖成功的生物化特征的差异。我们发现大型雄性产生较大的精子，产生更多的精子，导致操作精子：鸡蛋比（范围：21-37：1），在捕捞区域降低40％。我们的实验表明，在接收到精子后，悬浮的雌性交配接收性，并且这种行为是通过精子提供的化学和物理刺激的组合来控制。精子内精子的分布表明，通过实验室观察证实，不太可能从一个精子中施肥是不太可能的。这些结果突出了精子特征对多刺龙虾施肥成功的重要性，并表明野外的男性尺寸减少可能限制生殖成功。

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