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首页> 外文期刊>Marine biology >Understanding what we cannot see: a genetic approach to the mating system of the Southern Lanternshark, Etmopterus granulosus
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Understanding what we cannot see: a genetic approach to the mating system of the Southern Lanternshark, Etmopterus granulosus

机译：理解我们看不到的：南部达庭南部的交配系统的遗传方法，Etmopterus granulosus

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摘要

The Southern Lanternshark,Etmopterus granulosus, is a deep-sea shark commonly found throughout the oceans of the southern hemisphere and frequently caught as bycatch in deep-sea fisheries. Despite its common occurrence, little is known about this species' life history and reproductive biology. Here, we develop species-specific microsatellite markers to better understand the mating system ofE. granulosus. Eighteen litters were opportunistically collected as bycatch along the Madagascar Ridge, Walter's Shoal, and Southern Indian Ocean Ridge. Novel microsatellite loci were used to test for the presence and frequency of multiple paternity and morphological data were obtained from mothers to examine whether litter size or polyandry correlated with female size. Multiple paternity was found in 33% of litters, but no significant relationship between either litter size or the occurrence of polyandry and female size was found, although some adult individuals were found to have high internal relatedness. The frequency of multiple paternity in conjunction with these other factors could be indicators of mating between relatives or a reduction in population size due to fishing pressure.
机译：南方兰西克斯·埃特蒙特（Etmopterus Granulosus）是一个深海鲨鱼，常见于南半球的海洋整个海洋，经常被捕获在深海渔业中兼捕。尽管它发生了普遍，但对于这个物种的生命历史和生殖生物学知之甚少。在这里，我们开发特定于特定的微卫星标记，以更好地理解配合系统。甘蓝。沃尔特的山脊，沃尔特山脉和南方印度洋山脊的兼捕，18窝机会被充分收集为兼捕。新型微卫星基因座用于测试多种亲子关系的存在和频率，并从母亲获得的形态数据，以检查垃圾尺寸或聚积与雌性大小相关。在33％的小窝中发现了多种父权，但发现任何垃圾尺寸或聚积和女性尺寸的发生之间没有明显的关系，尽管发现一些成年人具有高内部相关性。与这些其他因素结合多种父项的频率可以是由于钓鱼压力而在患者之间交配的指标或群体大小的降低。

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  • 来源
    《Marine biology》 |2020年第9期|139.1-139.11|共11页
  • 作者

    Nehmens Melissa C.; Feldheim Kevin A.; Ebert David A.;

  • 作者单位

    Pacific Shark Res Ctr Moss Landing Marine Labs 8272 Moss Landing Rd Moss Landing CA 95039 USA;

    Field Museum Pritzker Lab Mol Systemat & Evolut 1400 S Lake Shore Dr Chicago IL USA;

    Pacific Shark Res Ctr Moss Landing Marine Labs 8272 Moss Landing Rd Moss Landing CA 95039 USA|Calif Acad Sci Dept Ichthyol 55 Mus Concourse Dr San Francisco CA 94118 USA|South African Inst Aquat Biodivers Private Bag 1015 ZA-6140 Grahamstown South Africa;

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