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首页> 外文期刊>Cybium >Early life history and description of larval stagesof an amphidromous goby, Sicyopterus lagocephalus(Gobioidei: Sicydiinae)
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Early life history and description of larval stagesof an amphidromous goby, Sicyopterus lagocephalus(Gobioidei: Sicydiinae)

机译：两栖虾虎鱼（Sicyopterus lagocephalus）（Gobioidei：Sicydiinae）的早期生活史和幼虫阶段的描述

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Sicyopterus lagocephalus is an amphidromous fish: adults live in rivers, but after hatching larvae are car-ried to the sea (dispersion stage). After a certain time spent at sea, post-larvae return to rivers to grow and reproduce. Sicy-opterus lagocephalus post-larvae recruiting to Reunion Island rivers (Mascarene Archipelago), provide an important foodsource to local populations and this fishing activity has a significant socio-economic impact. A better understanding of theearly life traits of this species and the characterisation of larval stages should improve the biological and physiologicalknowledge needed to understand the processes involved in the dispersion stage and help managers to implement conserva-tion measures. In Reunion Island, we characterised the development of larvae from hatching to migration to the sea. Theresults show that larvae do not undergo any development in freshwater, and that it is the arrival at sea that triggers the mor-phological transformations. Our results have also revealed that development is quicker when the temperature is high andthat development varies according to water depth during the downstream migration. In natural temperature conditions, themaximum survival rate in freshwater is four days. This suggests that when the downstream migration takes too longbecause of anthropogenic or hydraulic factors, the free embryos would die before they reach the sea.
机译：头尾轮虫（Sicyopterus lagocephalus）是一种两栖鱼类：成虫生活在河流中，但孵化后的幼体被运到海中（分散阶段）。经过一段时间的海上航行后，幼虫返回河流进行繁殖和繁殖。捕捞幼体后到尾cy鱼（Mascarene Archipelago）的Sicy-opterus lagocephalus，为当地居民提供了重要的食物来源，这种捕捞活动对社会经济产生了重大影响。更好地了解该物种的早期生命特征和幼体阶段的特征，应该可以提高了解分散阶段所涉及的过程所需的生物学和生理知识，并帮助管理者实施保护措施。在留尼汪岛，我们描绘了从孵化到向海洋迁移的幼体发育过程。结果表明，幼体在淡水中没有任何发育，并且是到达海洋触发了形态学转变。我们的结果还表明，温度升高时发育会加快，并且在下游迁移过程中，发育会根据水深而变化。在自然温度条件下，淡水中的最大存活率为四天。这表明，当下游迁移由于人为因素或水力因素而花费的时间太长时，自由胚胎将在它们进入海之前死亡。

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