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首页> 外文期刊>Fisheries Research >Seal bycatch in gillnet and entangling net fisheries in Irish waters
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Seal bycatch in gillnet and entangling net fisheries in Irish waters

机译：在爱尔兰海域捕捞刺网和缠网渔业的副渔获物

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A dedicated observer programme was carried out in gillnet and entangling net fisheries off the west and southwest coasts of Ireland to monitor interactions with seals. No seals were observed as bycatch in gillnet fisheries suggesting the risk of bycatch in observed gillnet fisheries is low. Grey seals (Halichoerus grypus) and to a lesser extent harbour seals (Phoca vitulina) were observed as bycatch principally in large mesh tangle nets targeting crawfish (Palinurus elephas). Observed bycatch levels, proximity of grey seal colonies to crawfish fisheries and similar habitat preferences suggest that the risk of seal bycatch in tangle net fisheries for crawfish on the west and southwest coasts of Ireland is high. Factors affecting bycatch in tangle nets were modeled to investigate potential bycatch mitigation measures. Crawfish and monkfish (Lophius spp.) catches, depth of gear deployment and larger mesh size were significantly positively correlated with seal bycatch. Development of mitigation measures such as improved net visibility, use of smaller mesh size and reintroduction of pots has major potential to reduce seal bycatch in the observed tangle net fishery. Growing seal populations in regions where tangle netting for crawfish is most prevalent could be related to factors such as benefits accrued from depredation and possible immigration from adjacent populations in the UK. More explicit conservation objectives will likely be needed to provide an impetus for development of proposed mitigation measures and bycatch reductions in Ireland. Results of this study also have broader ramifications for management of pinniped bycatch in large mesh gillnet and entangling net fisheries, which are widespread but poorly studied in European Community waters. (C) 2016 Elsevier B.V. All rights reserved.
机译：在爱尔兰的西海岸和西南海岸的刺网和缠结网渔业中开展了专门的观察​​员计划，以监测与海豹的互动。在刺网渔业中，没有发现海豹捕捞的副渔获物，这表明在观察到的刺网渔业中，副渔获物的风险很低。在主要针对小龙虾（Palinurus elephas）的大型网状缠结网中，灰海豹（Halichoerus grypus）和较小程度的海豹（Phoca vitulina）被视为兼捕。观察到的兼捕物水平，灰色海豹殖民地与小龙虾渔业的接近程度以及类似的栖息地偏好表明，在爱尔兰西海岸和西南海岸的小龙虾缠结网渔业中，海豹兼捕的风险很高。对缠结网中兼捕的影响因素进行建模，以研究潜在的缓解兼捕措施。小龙虾和安康鱼（Lophius spp。）的渔获量，渔具展开的深度和较大的网目大小与海豹兼捕量呈显着正相关。缓解措施的发展，例如改进的网状可见度，使用较小的网眼尺寸和重新引入锅具，在减少观察到的缠结网捕鱼中的海豹兼捕方面具有重大潜力。在小龙虾缠结网最为普遍的地区，海豹种群的增长可能与诸如折旧所产生的收益以及英国相邻种群的可能移民等因素有关。可能需要更明确的保护目标，以推动爱尔兰拟议的缓解措施的制定和副产品的减少。这项研究的结果对大型网状刺网和纠结网渔业中的夹网兼捕渔获物的管理也产生了更广泛的影响，在欧共体水域中这种现象普遍存在，但研究却很少。 （C）2016 Elsevier B.V.保留所有权利。

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