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 of E. 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.

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了解我们看不到的东西：南灯笼鲨（Etmopterus granulosus）交配系统的遗传方法

南方灯笼鲨（Etmopterus granulosus）是一种深海鲨鱼，常见于南半球的海洋中，在深海渔业中经常作为副渔获物捕获。尽管它很常见，但对该物种的生活史和生殖生物学知之甚少。在这里，我们开发了特定物种的微卫星标记，以更好地了解 E. granulosus 的交配系统。沿着马达加斯加海脊、沃尔特浅滩和南印度洋海脊，机会主义地收集了 18 只幼崽作为兼捕。使用新的微卫星位点来测试多父系的存在和频率，并从母亲那里获得形态学数据，以检查产仔数或一妻多夫是否与雌性大小相关。在 33% 的窝中发现了多重父子关系，但没有发现产仔数或一妻多夫的发生与雌性大小之间的显着关系，尽管发现一些成年个体具有高度的内部相关性。多个亲子关系的频率与这些其他因素相结合可能是亲属之间交配或由于捕捞压力导致种群规模减少的指标。