Stygiopontius senokuchiae (Dirivultidae, Copepoda), an endemic copepod species at deep hydrothermal vent sites, is biased to males
Stygiopontius senokuchiae (Dirivultidae, Copepoda), an endemic copepod species at deep hydrothermal vent sites, is biased to males
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Stygiopontius senokuchiae（Dirivultidae，Copepoda）是深部热液喷口处特有的桡足类物种，偏向雄性
DOI：
10.1007/s10872-020-00548-4
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发表时间：
2020
影响因子：
2.3
通讯作者：
Shimanaga M
中科院分区：
文献类型：
--
作者：
Senokuchi R;Nomaki H;Uyeno D;Watanabe HK;Kitahashi T;Shimanaga M
Stygiopontiuscopepods（Dirivultidae、Siphonostomatoida、Crustacea）是深海热液喷口最成功的小型底栖生物之一。它们的大部分生态状况尚不清楚，包括它们性别比例的时空差异及其控制因素。我们研究了成年Stygiopontius senokuchiae性别比例的空间变化及其与环境参数的关系，包括北太平洋西部三个邻近海丘（Bayonnaise Knoll、Myojin Knoll和Myojin-sho Caldera）火山口热液喷口烟囱结构的食物质量。它们的性别比例从1:1显着偏向雄性，这与其他一些Stygiopontius物种不同。该比率与成人总密度没有显着相关性。虽然之前的研究表明S的丰度。 senokuchiaeis 与活动烟囱碎屑的 δ13C 值呈正相关，本研究中的多变量分析未发现其性别比与包括 δ13C 在内的任何研究参数之间存在任何显着关联。这些发现表明，种群密度和化学自养食物供应都不会驱动该物种成虫喷口周围空间分布的性别差异。
Stygiopontiuscopepods (Dirivultidae, Siphonostomatoida, Crustacea) are among the most successful meiobenthic organisms at deep-sea hydrothermal vents. Most of their ecology is not yet known, including the spatiotemporal differences in their sex ratios and their controlling factors. We investigated spatial variation in the sex ratio of adultStygiopontius senokuchiaeand its association with environmental parameters, including food quality at hydrothermal vent chimney structures in the calderas of three neighboring sea knolls (Bayonnaise Knoll, Myojin Knoll, and Myojin-sho Caldera) in the western North Pacific Ocean. Their sex ratio was significantly biased to males from 1:1, which was different from some of the otherStygiopontiusspecies. The ratios did not show a significant correlation with the density of total adults. While previous studies have shown that the abundance ofS. senokuchiaeis positively associated with δ13C values of detritus on active chimneys, multivariate analyses in this study did not detect any significant association between their sex ratio and any investigated parameters including δ13C. These findings suggest that neither population density nor chemoautotrophic food availability drives the sexual difference in the spatial distribution around vents among the adults of the species.