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首页> 外文期刊>International Journal of Marine Science >First Report on Mass Reproductive Swarming of a Polychaete Worm, Dendronereis aestuarina (Annelida, Nereididae) Southern 1921, from a Freshwater Environment in the South West Coast of India
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First Report on Mass Reproductive Swarming of a Polychaete Worm, Dendronereis aestuarina (Annelida, Nereididae) Southern 1921, from a Freshwater Environment in the South West Coast of India

机译：关于印度西南沿海淡水环境中的多毛蠕虫Dendronereis aestuarina（Annelida，Nereididae）1921年南部大规模繁殖群的第一份报告。

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摘要

In the present study we report the occurrence of red coloured mass reproductive swarms of Dendronereis aestuarina from Periyar River of the south west coast of India. It was observed in the freshwater zone of the river during the evening hours of August 31st, 2010. Reproductive swarming behaviourof D. aestuarina has been first reported by Southern, 1921 from brackishwater environment in the Gangetic delta , however present study reports first time from absolutely freshwater environment. The density of swarmed polychaete was ~14800 indls. m-2 with the average length of 86 ± 16 mm. Male worms were dominated in the 60 specimens analyzed and the sex ratio was 3:1 (M/F). The average diameter of eggs collected from polychaete body was 0.33 ± 0.08 mm. Swarming was extended for two days; after successful mating and spawning they were died.
机译：在本研究中，我们报告了印度西南海岸的佩里亚尔河上出现的红色石end繁殖群的发生。在2010年8月31日的傍晚时分在河的淡水区中观察到。D. aestuarina的繁殖群行为最早于1921年由Southern报道，来自恒河三角洲苦咸水环境，然而，本研究首次报道绝对是在淡水环境中。蜂群的密度为〜14800 indls。 m -2 ，平均长度为86±16 mm。在分析的60个标本中，雄性蠕虫占主导地位，性别比为3：1（M / F）。从多壳动物体内收集的卵的平均直径为0.33±0.08 mm。群集时间延长了两天;在成功交配和产卵后，他们就死了。

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