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Marine turtle harvest in a mixed small-scale fishery: Evidence for revised management measures

机译：混合小型渔业中的海龟收获：修订管理措施的证据

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摘要

Small-scale fisheries (SSF) account for around half of the world's marine and inland fisheries, but their impact on the marine environment is usually under-estimated owing to difficulties in monitoring and regulation. Successful management of mixed SSF requires holistic approaches that sustainably exploit target species, consider non-target species and maintain fisher livelihoods. For two years, we studied the marine turtle fishery in the Turks and Caicos Islands (TCI) in the Wider Caribbean Region, where the main export fisheries are queen conch (Strombus gigas) and the spiny lobster (Panulirus argus); with fin-fish, green turtles (Chelonia mydas) and hawksbill turtles (Eretmochelys imbricata) taken for domestic consumption. We evaluate the turtle harvest in relation to the other fisheries and recommend legislation and management alternatives. We demonstrate the connectivity between multi-species fisheries and artisanal turtle capture: with increasing lobster catch-per-unit-effort (CPUE), hawksbill catch increased whilst green turtle catch decreased. With increasing conch CPUE, hawksbill catch declined and there was no demonstrable effect on green turtle catch. We estimate 176-324 green and 114-277 hawksbill turtles are harvested annually in TCI: the largest documented legal hawksbill fishery in the western Atlantic. Of particular concern is the capture of adult turtles. Current legislation focuses take on larger individuals that are key to population maintenance. Considering these data we recommend the introduction of maximum size limits for both species and a closed season on hawksbill take during the lobster fishing season. Our results highlight the need to manage turtles as part of a broader approach to SSF management.
机译：小型渔业（SSF）约占世界海洋和内陆渔业的一半，但由于监测和监管方面的困难，它们对海洋环境的影响通常被低估了。成功地管理混养小规模渔业需要采取全面的方法，以可持续地开发目标物种，考虑非目标物种并维持渔民生计。两年来，我们研究了大加勒比地区特克斯和凯科斯群岛（TCI）的海龟渔业，主要出口渔业为海螺女王（Strombus gigas）和多刺龙虾（Panulirus argus）；食用有鳍鱼，绿海龟（Chelonia mydas）和海龟（Eretmochelys imbricata）供家庭食用。我们评估与其他渔业有关的海龟捕捞，并提出立法和管理替代方案。我们证明了多种渔业与手工海龟捕捞之间的联系：随着单位龙虾捕捞量的增加，的捕捞增加而绿海龟的捕捞减少。随着海螺CPUE的增加，的捕获量下降，对绿海龟的捕获量没有明显的影响。我们估计TCI每年捕捞176-324只绿and和114-277只s：这是西大西洋地区有记录的最大合法legal渔业。特别令人关注的是成年海龟的捕获。当前的立法侧重于对维持人口至关重要的较大个人。考虑到这些数据，我们建议对这两个物种引入最大尺寸限制，并建议在龙虾捕捞季节对a采取封闭季节。我们的结果表明，作为更广泛的SSF管理方法的一部分，需要管理海龟。

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  • 来源
    《Ocean & coastal management》 |2013年第9期|34-42|共9页
  • 作者

    Thomas B. Stringell; Marta C. Calosso; John A.B. Claydon; Wesley Clerveaux; Brendan J. Godley; Kathy J. Lockhart; Quinton Phillips; Susan Ranger; Peter B. Richardson; Amdeep Sanghera; Annette C. Broderick;

  • 作者单位

    Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn TR10 9EZ, UK;

    The School for Field Studies, Center for Marine Resource Studies, South Caicos, Turks and Caicos Islands;

    The School for Field Studies, Center for Marine Resource Studies, South Caicos, Turks and Caicos Islands;

    Department of Environment and Maritime Affairs (formerly the Department of Environment and Coastal Resources). South Caicos, Turks and Caicos Islands;

    Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn TR10 9EZ, UK;

    Department of Environment and Maritime Affairs (formerly the Department of Environment and Coastal Resources). South Caicos, Turks and Caicos Islands;

    Department of Environment and Maritime Affairs (formerly the Department of Environment and Coastal Resources). South Caicos, Turks and Caicos Islands;

    Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn TR10 9EZ, UK,Marine Conservation Society, Ross on Wye, Herefordshire HR9 5NB, UK;

    Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn TR10 9EZ, UK,Marine Conservation Society, Ross on Wye, Herefordshire HR9 5NB, UK;

    Marine Conservation Society, Ross on Wye, Herefordshire HR9 5NB, UK;

    Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn TR10 9EZ, UK;

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