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首页> 外文期刊>Ocean & coastal management >Incidental capture of green turtle (Chelonia my das) in gillnets of small-scale fisheries in the Paranagua Bay, Southern Brazil
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Incidental capture of green turtle (Chelonia my das) in gillnets of small-scale fisheries in the Paranagua Bay, Southern Brazil

机译：在巴西南部巴拉那瓜湾的小型渔业刺网中偶然捕获绿海龟（Chelonia my das）

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摘要

Fishing activities are an important economic resource in the Paranagua Bay, southern Brazil. In this area, there are reports of sea turtles interacting with small-scale fisheries. It was found that the juvenile greenturtle {Chelonia mydas) uses areas disturbed by fishing activity, which puts them at a higher risk of capture. The objective of this study was to evaluate the interactions of juvenile green-turtles with the gillnets used in small-scale fisheries, enabling a long-term understanding of those gillnet characteristics which increase the risk of turtle captures. The highest sea turtle capture rates occur in the early dry season, which is correlated with the larger displacement of individuals searching for available food sources. High levels of fishing effort also occur in this early dry period without a specific target resource. The highest levels of sea turtle mortality were observed during the coldest periods of the year (late rainy and early dry seasons) and can be related to the physiological needs of the sea turtles. The characteristics of gillnets that had the strongest relationships to turtle captures were soak time and mesh size. These results suggest that it is necessary to design new regulations governing aspects of fishing techniques such as soak time, net length or seasonal use of nets. Conservation initiatives aiming to reduce the risk of turtle capture must consider the economic importance of small-scale fishing practices and address the conflict that may exist between social concerns and environmental issues.
机译：钓鱼活动是巴西南部巴拉那瓜湾的重要经济资源。在该地区，有海龟与小型渔业相互作用的报道。据发现，幼年绿tur（Chelonia mydas）使用的是受捕捞活动干扰的区域，这使它们的捕捞风险更高。这项研究的目的是评估小型海龟与小规模捕捞中使用的刺网的相互作用，从而长期了解那些增加了捕获海龟风险的刺网特征。最高的海龟捕获率发生在早期的干旱季节，这与寻找可用食物来源的个体更大的流离失所有关。在没有特定目标资源的情况下，早期干旱期也需要大量捕捞努力。在一年中最冷的季节（雨季和早期干旱季节）观察到最高水平的海龟死亡率，这可能与海龟的生理需要有关。与乌龟捕获关系最密切的刺网的特征是浸泡时间和网孔大小。这些结果表明，有必要设计新的法规来管理捕鱼技术的各个方面，例如浸泡时间，网长或网的季节性使用。旨在减少捕捞海龟风险的养护举措必须考虑到小型捕捞活动的经济重要性，并解决社会关注与环境问题之间可能存在的冲突。

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  • 来源
    《Ocean & coastal management》 |2012年第5期|p.11-18|共8页
  • 作者

    E.A. Lopez-Barrera; G.O. Longo; E.L.A. Monteiro-Filho;

  • 作者单位

    Universidade Federal do Parana, Programa de Pos-Craduacao em Ecologia e Conservacao, Setor de Ciencias Bioldgicas, PO Box 19031, CEP 81531-980, Curitiba, PR, Brazil;

    Universidade Federal de Santa Catarina, Programa de P6s-Cradua0o em Ecologia, Dep. Ecologia e Zoologia, Lab. Biogeografia e Macroecologia Marinha, CEP 88010970, Floriandpolis, SC, Brazil;

    Universidade Federal do Parana, Departamento de Zoologia, Setor de Ciencias Biologicas, Departamento de Zoologia, PO Box 19020, CEP 81531-980, Curitiba, PR, Brazil,IeC - Institute de Pesquisas Cananeia, Rua Tristao Lobo, 199 CEP 11990-000, Cananeia, SP, Brazil;

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