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首页> 外文期刊>Oceanographic Literature Review >Population genetic structure of the oceanic whitetip shark, Carcharhinus longimanus, along the Indian coast
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Population genetic structure of the oceanic whitetip shark, Carcharhinus longimanus, along the Indian coast

机译：沿着印度海岸的海洋白叶鲨鱼群群遗传结构，Carcharhinus Longimanus

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摘要

Sharks are undergoing population declines worldwide and it is imperative to devise conservation and management strategies to prevent their extinction. Oceanic whitetip sharks are large pelagic sharks distributed circumglobally and recent IUCN assessments classified them as "critically endangered." Considering their vulnerability, we investigated the intraspecific diversity and genetic stock structure of oceanic whitetip shark, Carcharhinus longimanus, along the Indian coast using mitochondrial control region sequences so that viable management guidelines can be formulated in the Indian Ocean region. Population genetic analyses revealed a lack of significant genetic differentiation along the Indian coast indicating substantial gene flow and connectivity among populations. Comparisons of data of the present study with that of Atlantic Ocean regions indicated significant connectivity and gene flow between Indian and East Atlantic regions and a lack of connectivity between Indian and West Atlantic Ocean regions. Oceanic whitetip sharks have substantial capacity for oceanic migration resulting in the mixing of gene pools. Despite these capabilities, overfishing is one of the major drivers of population decline worldwide, resulting in severe fragmentation of populations. Based on the results of the present study, this species can be managed as a single stock along the Indian coast. Further co-management measures along with countries bordering East Atlantic coast can also be devised. Management should consider a complete or seasonal ban of the fishery in addition to restrictions in gear types.
机译：鲨鱼正在全世界人口下降，并且必须设计保护和管理战略，以防止灭绝。海洋白白鲨鱼是庞大的鲨鱼，分布了恒定的气概，最近的IUCN评估将它们分类为“危险地濒临威胁”。考虑到他们的脆弱性，我们调查了海洋白白鲨鱼，Carcharhinus Longimanus的内部多样性和遗传股票结构，使用线粒体控制区域序列，使可行的管理指南可以在印度洋地区制定。人口遗传分析揭示了沿着印度海岸缺乏显着的遗传分化，表明人口中的大量基因流动和连通性。本研究数据与大西洋地区的数据比较表明印度和东大西洋地区之间的显着连通性和基因流动以及印度和西大西洋地区之间的连通性。海洋白白鲨鱼具有大量的海洋迁移能力，导致基因库的混合。尽管有这些能力，过度捕捞是全世界人口下降的主要驱动因素之一，导致人口严重碎片。基于本研究的结果，该物种可以作为印度海岸作为单一的股票管理。还可以设计进一步的共同管理措施以及与东大西洋海岸边界国家的国家。除齿轮类型的限制外，管理层还应考虑渔业的完整或季节性禁令。

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  • 来源
    《Oceanographic Literature Review》 |2020年第10期|2259-2259|共1页
  • 作者

    S. Sreelekshmi; S. Sukumaran; T.G. Kishor;

  • 作者单位

    ICAR- Central Marine Fisheries Research Institute Ernakulam North P.O. Kochi Kerala 682018 India;

    ICAR- Central Marine Fisheries Research Institute Ernakulam North P.O. Kochi Kerala 682018 India;

    ICAR- Central Marine Fisheries Research Institute Ernakulam North P.O. Kochi Kerala 682018 India;

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