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首页> 外文期刊>ICES Journal of Marine Science >Risso's dolphin depredation in the Azorean hand-jig squid fishery: assessing the impacts and evaluating effectiveness of acoustic deterrents
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Risso's dolphin depredation in the Azorean hand-jig squid fishery: assessing the impacts and evaluating effectiveness of acoustic deterrents

机译：Risso在亚速尔群岛手工捕捞鱿鱼渔业中对海豚的掠夺：评估声音威慑的影响并评估其有效性

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摘要

Depredation by cetaceans is a growing problem that may have serious economic implications for fisheries and for dolphin conservation. We investigated depredation by Risso's dolphin (Grampus griseus) in the hand-jig squid fishery around the Azores to determine the factors that may influence depredation behaviour and impacts on the fishery, and conducted experiments to evaluate the effectiveness of acoustic deterrent devices. Monitoring of the interaction between dolphins and the fishery was carried out through interviews with fishers and observations made from fishing vessels. Depredation was reported in 50% of the 506 interviews conducted from 2009 to 2011 and Risso's dolphins were reportedly responsible for 92% of the depredation events. Risso's dolphin depredation was recorded in 33% of the observed fishing trips (n = 96). Generalized additive models revealed that depth, sea surface temperature, and fishing time were important factors affecting depredation probability. Generalized linear models showed that fishing time also influenced the number of squids depredated, with greater catch losses predicted as duration of the fishing events increased. Depredation rate was calculated at 3% yielding an estimate of 8-12 t of squid lost to dolphins per year and an annual economic loss of €50 000 for the squid fishery of S. Miguel. The use of pingers had no significant effect on the catch per unit effort of squids. Depredation rates were similar for the control (0.20), inactive (0.19), and active (0.19) pinger conditions. Models indicated no significant effect of pinger brand and condition on cetacean depredation. This study is the first attempt to monitor depredation by Risso's dolphins on a hand-jig squid fishery providing a scientific basis for future management of interactions between cetaceans and fisheries.
机译：鲸类的掠食是一个日益严重的问题，可能对渔业和海豚的养护产生严重的经济影响。我们调查了亚速尔群岛附近人工跳动的鱿鱼渔业中里索海豚（Grampus griseus）的掠夺行为，以确定可能影响掠夺行为和对渔业的影响的因素，并进行了实验，以评估声学威慑设备的有效性。通过与渔民的访谈和渔船的观察对海豚与渔业之间的相互作用进行监测。在2009年至2011年进行的506次采访中，有50％报告了掠夺事件，据报道，Risso的海豚造成了92％的掠夺事件。在观察到的捕鱼行程的33％（n = 96）中记录了Risso的海豚掠夺事件。广义加性模型表明，深度，海面温度和捕鱼时间是影响折旧概率的重要因素。广义线性模型表明，捕捞时间也影响了鱿鱼的数量，随着捕捞时间的延长，预计捕捞损失会更大。计算出的折旧率为3％，据估计，海豚每年损失8至12吨海豚，S。Miguel的鱿鱼捕捞每年造成5万欧元的经济损失。使用pinger对鱿鱼的单位产量捕获量没有显着影响。对照条件（0.20），非活动状态（0.19）和活动状态（0.19）的弃置率相似。模型显示pinger品牌和状况对鲸类动物的掠食行为没有显着影响。这项研究是首次监测Risso的海豚在手钓鱿鱼渔业中的掠食行为，为将来管理鲸类与渔业之间的相互作用提供科学依据。

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  • 来源
    《ICES Journal of Marine Science》 |2014年第9期|2608-2620|共13页
  • 作者

    Maria Joao Cruz; Vera Leal Jordao; Joao Gil Pereira; Ricardo Serrao Santos; Monica A. Silva;

  • 作者单位

    Departamento de Oceanografia e Pescas, IMAR and LARSyS Associated Laboratory, Universidade dos Acores, 9901-862 Horta, Portugal;

    Departamento de Oceanografia e Pescas, IMAR and LARSyS Associated Laboratory, Universidade dos Acores, 9901-862 Horta, Portugal;

    Departamento de Oceanografia e Pescas, IMAR and LARSyS Associated Laboratory, Universidade dos Acores, 9901-862 Horta, Portugal;

    Departamento de Oceanografia e Pescas, IMAR and LARSyS Associated Laboratory, Universidade dos Acores, 9901-862 Horta, Portugal;

    Departamento de Oceanografia e Pescas, IMAR and LARSyS Associated Laboratory, Universidade dos Acores, 9901-862 Horta, Portugal ,Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA;

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  • 正文语种 eng
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  • 关键词

    acoustic deterrents; depredation; Risso's dolphin; squid fishery;

    机译：声学威慑贬低里索的海豚;鱿鱼渔业;

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