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Review of the taxonomy and biogeography of Asian species of the mysid genus Mesopodopsis (Crustacea, Mysida)

糠虾属 Mesopodopsis（甲壳纲，糠虾属）亚洲种的分类学和生物地理学综述

基本信息

批准号：
20570101
负责人：
HANAMURA Yukio
金额：
$ 2.91万
依托单位：
Japan International Research Center for Agricultural Sciences
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2008
资助国家：
日本
起止时间：
2008 至 2010
项目状态：
已结题

项目摘要

The Indo-Australasian mysid Mesopodopsis orientalis (Tattersall, 1908) (Crustacea, Mysida) has been recorded from the tropical and sub-tropical waters of the south-western India to the Philippines. Due to its abundance, this mysid is regarded as one of the most important species in the shallow coastal and estuarine crustacean community.Following the examination of the syntypes and topotypes of M.orientalis, the identity of this species was re-defined, and a new species, M.tenuipes, was established on the basis of the assessment of morphological and DNA analyses. Mesopodopsis orientalis is distributed from Pakistan through the Philippines while M.tenuipes has captured from the Malay Peninsula to the Philippines. However, occurrence records of M.orientalis made in early 1900s in India need to be reanalysed to rectify confusion with M.zeylanica Nouvel, 1954. At several sites, these two species coexisted, although M.tenuipes usually inhabits inner estuaries or less haline waters as compare … More d to M.orientalis.The biological and ecological studies have revealed significant differences in certain life history features between the aforementioned populations and the estuarine species carried larger-sized, fewer numbers of eggs and again larger in subsequent ontogenetic stages than the coastal one.The analyses of mitochondrial DNA also suggested higher genetic diversification within each lineage along their geographical transitions, suggesting a high possibility of cryptic speciation in each species group.Reproductive activity of M.orientalis and M.tenuipes is year-round in the tropical coastal and estuarine waters. The analysis of epibioses demonstrated that the biological association between ciliate and hyperbenthic crustacean is being well established in tropical mangrove estuaries throughout the year, with a reverse relationship between the incidence of epibiontic ciliates and salinity. In contrast, this association was hardly observed in the coastal waters : hence there is a possibility that epibiontic ciliates could be a biomarker discriminating crustacean populations of different habitats. Less

印度-澳大利亚糠虾Mesopodopsis orientalis（Tattersall，1908）（甲壳纲，糠虾目）已记录于印度西南部至菲律宾的热带和亚热带沃茨。本文通过对东方糠虾（M.orientalis）的形态和拓扑型的研究，重新确定了东方糠虾（M.orientalis）的分类地位，并根据形态学和DNA分析结果，将东方糠虾（M.tenuipes）确定为一新种。Mesopodopsis orientalis分布于巴基斯坦至菲律宾，而M.tenuipes则分布于马来半岛至菲律宾。然而，需要重新分析20世纪初在印度进行的M.orientalis的发生记录，以纠正与M.zeylanica Nouvel，1954的混淆。在一些地点，这两个物种共存，虽然M.tenuipes通常栖息在河口或低盐沃茨相比， ...更多信息生物学和生态学研究表明，上述种群在某些生活史特征上存在显著差异，河口种个体较大，产卵量较少，个体发育阶段又较大，线粒体DNA分析也表明，沿着地理过渡，各谱系内的遗传多样性较高，在热带沿海和河口沃茨，东方蛤和细足蛤的繁殖活动是全年性的。表生体分析表明，热带红树林河口全年都存在纤毛虫和超底栖甲壳动物之间的生物学联系，表生体纤毛虫的发生率与盐度呈反向关系。与此相反，这种关联在沿海沃茨几乎没有观察到：因此，有可能epibionic纤毛虫可能是一个生物标志物区分不同生境的甲壳动物种群。少