Multiple paternity seems common within elasmobranchs. Focusing on two deep-sea shark species: the velvet belly lanternshark, Etmopterus spinax, and the slendertail lanternshark, Etmopterus molleri, we inferred the paternity in 31 E. spinax litters from Norway (3-18 embryos per litter) and 6 E. molleri litters from Japan (3-6 embryos), using 21 and 10 specific microsatellites, respectively. At least two E. spinax litters were sired from multiple fathers each, with highly variable paternal skew (1:1 to 9:1). Conversely, no clear signal of genetic polyandry was found in E. molleri. This article is protected by copyright. All rights reserved.

中文翻译：

---

在黑暗的亲密关系中：深海发光灯笼鲨 Etmopterus spinax 和 Etmopterus molleri（Squaliformes，Etmopteridae）的遗传一妻多夫

在 elasmobranchs 中，多重父子关系似乎很常见。我们专注于两种深海鲨鱼物种：天鹅绒腹灯笼鲨 Etmopterus spinax 和细尾灯笼鲨 Etmopterus molleri，我们推断了来自挪威的 31 只 E. spinax 窝（每窝 3-18 个胚胎）和 6 E. molleri 的亲子关系来自日本的窝（3-6 个胚胎），分别使用 21 和 10 颗特定的微卫星。至少有两个 E. spinax 窝是从多个父亲中每一个的后代，具有高度可变的父系偏斜（1:1 到 9:1）。相反，在 E. molleri 中没有发现明显的遗传一妻多夫的信号。本文受版权保护。版权所有。