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首页> 外文期刊>Marine ecology >Annual Variation of the Reproductive Activity of Three Exogoninae Species (Polychaeta: Syllidae) from the Western Mediterranean
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Annual Variation of the Reproductive Activity of Three Exogoninae Species (Polychaeta: Syllidae) from the Western Mediterranean

机译：西地中海三种外来物种的生殖活动的年度变化（Polychaeta：Syllidae）

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摘要

During a 12-month period (from May 2000 to the end of April 2001), the reproductive activity of three Exogoninae species was studied: Grubeosyllis clavata (Claparede, 1868), G. vieitezi (San Martin, 1984) and Sphaerosyllis (Sphaerosyllis) hystrix Claparede, 1863. A sample consisting of two replicates was collected every second month, and the individuals of each species were counted and assigned to different reproductive categories (immature, mature, and bearing eggs or embryos). The populations of the three species showed a dramatic decline in numbers during summer 2000. In regard to the reproductive activity, the two species of Grubeosyllis showed a continuous activity during the whole year, with a peak in July for G. vieitezi and in September and November for G. clavata. In contrast, S. (S.) hystrix had a pause in its reproductive activity in late summer when no mature or offspring-carrying specimens were found. A relationship between the reproductive cycle and the brooding type (dorsal eggs versus ventral embryos) is likely, although further studies on other exogonin species are necessary to confirm the hypothesis suggested by the present results.
机译：在12个月内（从2000年5月到2001年4月底），研究了三种Exogoninae物种的繁殖活性：Grubeosyllis clavata（克拉珀雷德，1868年），G。vieitezi（San Martin，1984年）和Sphaerosyllis（Sphaerosyllis） hystrix Claparede，1863年。每隔两个月收集一次由两个重复样本组成的样本，并对每个物种的个体进行计数，并将其划分为不同的生殖类别（未成熟，成熟和带有卵或胚胎的生殖类别）。这三个物种的种群在2000年夏季期间数量急剧减少。就生殖活动而言，格氏灰熊的两个物种在全年中都表现出持续的活动，七月份的G. vieitezi和九月和九月的高峰。 G. clavata的十一月。相反，在夏末，没有发现成熟或携带后代的标本，S。（S.）hystrix的繁殖活动暂停。生殖周期与育雏类型（背卵与腹胚）之间可能存在联系，尽管需要进一步研究其他外泌素的种类以证实当前结果所提出的假设。

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