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首页> 外文期刊>Marine ecology progress series >Reducing green turtle bycatch in small-scale fisheries using illuminated gillnets: the cost of saving a sea turtle
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Reducing green turtle bycatch in small-scale fisheries using illuminated gillnets: the cost of saving a sea turtle

机译：使用带照明的刺网减少小型渔业中的绿海龟兼捕：拯救海龟的成本

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摘要

Gillnet fisheries exist throughout the oceans and have been implicated in high by catch rates of sea turtles. In this study, we examined the effectiveness of illuminating nets with light-emitting diodes (LEDs) placed on floatlines in order to reduce sea turtle bycatch in a small-scale bottom-set gillnet fishery. In Sechura Bay, northern Peru, 114 pairs of control and illuminated nets were deployed. The predicted mean catch per unit effort (CPUE) of target species, standardized for environmental variables using generalized additive model (GAM) analysis, was similar for both control and illuminated nets. In contrast, the predicted mean CPUE of green turtles Chelonia mydas was reduced by 63.9% in illuminated nets. A total of 125 green turtles were caught in control nets, while 62 were caught in illuminated nets. This statistically significant re duction (GAM analysis, p < 0.05) in sea turtle bycatch suggests that net illumination could be an effective conservation tool. Challenges to implementing the use of LEDs include equipment costs, increased net handling times, and limited awareness among fishermen regarding the effectiveness of this technology. Cost estimates for preventing a single sea turtle catch are as low as 34 USD, while the costs to outfit the entire gillnet fishery in Sechura Bay can be as low as 9200 USD. Understanding these cost challenges emphasizes the need for institutional support from national ministries, inter national non-governmental organizations and the broader fisheries industry to make possible widespread implementation of net illumination as a sea turtle bycatch reduction strategy.
机译：刺网渔业遍布整个海洋，并与海龟的捕获率高有关。在这项研究中，我们研究了在浮标线上放置发光二极管（LED）的照明网的有效性，以减少小规模底部固定刺网渔业中的海龟副渔获物。在秘鲁北部的Sechura湾，部署了114对控制网和照明网。对于控制网和照明网，使用广义加性模型（GAM）分析对环境变量进行标准化的目标物种的预计平均单位捕获量（CPUE）均相似。相反，在照明网中，绿海龟Chelonia mydas的预测平均CPUE降低了63.9％。总共125只绿海龟被捕获在控制网中，而62只被捕获在照明网中。在海龟兼捕中，这种具有统计意义的显着减少（GAM分析，p <0.05）表明，净光照可能是一种有效的保护手段。实施LED的挑战包括设备成本，增加的净装卸时间以及渔民对这项技术的有效性的了解有限。防止单个海龟捕捞的成本估算低至34美元，而在Sechura湾配备整个刺网渔业的成本则可低至9200美元。理解这些成本挑战强调了国家部委，国家间非政府组织和更广泛的渔业机构的机构支持的必要性，以便有可能广泛实施净照明作为减少海龟兼捕的战略。

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  • 来源
    《Marine ecology progress series》 |2016年第8期|251-259|共9页
  • 作者

    Ortiz Natalia; Mangel Jeffrey C.; Wang John; Alfaro-Shigueto Joanna; Pingo Sergio; Jimenez Astrid; Suarez Tania; Swimmer Yonat; Carvalho Felipe; Godley Brendan J.;

  • 作者单位

    ProDelphinus, Octavio Bernal 572-5, Lima 11, Peru;

    ProDelphinus, Octavio Bernal 572-5, Lima 11, Peru|Univ Exeter, Ctr Ecol & Conservat, Penryn TR10 9EZ, Cornwall, England;

    NOAA, Natl Marine Fisheries Serv, Pacific Isl Fisheries Sci Ctr, Honolulu, HI 96818 USA;

    ProDelphinus, Octavio Bernal 572-5, Lima 11, Peru|Univ Exeter, Ctr Ecol & Conservat, Penryn TR10 9EZ, Cornwall, England|Univ Cient Sur, Fac Biol Marina, Panamer Km 19, Lima, Peru;

    ProDelphinus, Octavio Bernal 572-5, Lima 11, Peru;

    ProDelphinus, Octavio Bernal 572-5, Lima 11, Peru;

    ProDelphinus, Octavio Bernal 572-5, Lima 11, Peru;

    NOAA, Natl Marine Fisheries Serv, Pacific Isl Fisheries Sci Ctr, Honolulu, HI 96818 USA;

    NOAA, Natl Marine Fisheries Serv, Pacific Isl Fisheries Sci Ctr, Honolulu, HI 96818 USA|Univ Hawaii, Joint Inst Marine & Atmospher Res, Honolulu, HI USA;

    Univ Exeter, Ctr Ecol & Conservat, Penryn TR10 9EZ, Cornwall, England;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    LEDs; Green turtles; CPUE; Small-scale fishery; Bycatch; Peru;

    机译：LED;绿海龟;CPUE;小型渔业;Bycatch;秘鲁;

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