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首页> 外文期刊>ICES Journal of Marine Science >Shark finning in eastern Indonesia: assessing the sustainability of a data-poor fishery
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Shark finning in eastern Indonesia: assessing the sustainability of a data-poor fishery

机译：印度尼西亚东部的鲨鱼鳍：评估数据贫乏渔业的可持续性

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摘要

For over two decades, Indonesia has reported higher average shark landings than any other nation, but very little local information exists on the fishery and life histories of targeted species. This poses severe challenges to shark sustainability and conservation in this vast archipelago. We draw on diverse sources of data to evaluate the sustainability of the shark fishery in eastern Indonesia, a particularly data-poor region where sharks are primarily targeted for their fins. Shark fishers from three coastal communities were interviewed on their perceptions of catch trends over the past twenty years and asked to collect fishing data during fishing trips in the Seram, Arafura and Timor Seas. For the most frequently harvested species, we estimated maximum intrinsic rates of increase (r(max)) to predict their resilience to fishing pressure. Our results indicate that shark fishing practices in the region are likely to be unsustainable. The catches of several species largely comprised of immature individuals and most fishers attributed observed declines in shark numbers, size and species diversity to overfishing. Hammerhead sharks have relatively high intrinsic resilience but are nevertheless at risk of local extinction due to their availability to the fishery and the value of their fins. Sandbar, dusky and grey reef sharks have lower resilience and are frequently caught but not managed. We recommend a composite management approach, including consistent implementation of existing trade restrictions, fisheries research and opportunities for fishers' livelihood diversification, to stem shark harvests in eastern Indonesia.
机译：在过去的二十多年中，印度尼西亚报告的鲨鱼平均着陆次数高于任何其他国家，但有关目标物种的渔业和生活史的本地信息很少。在这个庞大的群岛中，这给鲨鱼的可持续性和保护提出了严峻的挑战。我们利用各种数据来源来评估印度尼西亚东部鲨鱼渔业的可持续性，这是一个特别缺乏数据的地区，这里鲨鱼主要是作为其鳍的目标。采访了来自三个沿海社区的鲨鱼渔民，以了解他们在过去20年中的捕捞趋势，并要求他们在Seram，Arafura和帝汶海的钓鱼之旅中收集捕捞数据。对于收获最频繁的物种，我们估计了最大内在增长率（r（max））以预测其对捕鱼压力的抵抗力。我们的结果表明，该地区的鲨鱼捕捞活动可能不可持续。若干物种的捕捞量主要由未成熟个体组成，大多数渔民将观察到的鲨鱼数量，大小和物种多样性下降归因于过度捕捞。锤头鲨具有相对较高的固有弹性，但由于其可用于渔业和其鳍的价值而面临局部灭绝的风险。沙洲，昏暗和灰礁鲨的回弹力较低，经常被捕获，但没有得到管理。我们建议采用一种综合管理方法，包括持续实施现有的贸易限制措施，进行渔业研究以及实现渔民生计多样化的机会，以阻止印度尼西亚东部鲨鱼的收获。

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  • 来源
    《ICES Journal of Marine Science》 |2017年第1期|242-253|共12页
  • 作者

    Jaiteh Vanessa F.; Hordyk Adrian R.; Braccini Matias; Warren Carol; Loneragan Neil R.;

  • 作者单位

    Murdoch Univ, Sch Vet & Life Sci, Ctr Fish & Fisheries Res, Murdoch, WA, Australia|Murdoch Univ, Asia Res Ctr, Sch Management & Governance, Murdoch, WA, Australia;

    Murdoch Univ, Sch Vet & Life Sci, Ctr Fish & Fisheries Res, Murdoch, WA, Australia;

    Western Australian Fisheries, North Beach, WA, Australia|Marine Res Labs, North Beach, WA, Australia;

    Murdoch Univ, Asia Res Ctr, Sch Management & Governance, Murdoch, WA, Australia;

    Murdoch Univ, Sch Vet & Life Sci, Ctr Fish & Fisheries Res, Murdoch, WA, Australia|Murdoch Univ, Asia Res Ctr, Sch Management & Governance, Murdoch, WA, Australia;

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  • 正文语种 eng
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  • 关键词

    Arafura sea; elasmobranch; life history; r(max); small-scale fisheries; Timor sea;

    机译：阿拉法拉海;弹性分支;生活史;r（max）;小型渔业;蒂莫尔海;

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