仅靠可持续捕捞无法阻止葡萄牙绿蟹渔业的衰退

IF 2 3区 农林科学 Q2 FISHERIES
João N. Monteiro, Rubén Roa-Ureta, Andreia Ovelheiro, Maria Alexandra Teodósio, Francisco Leitão
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引用次数: 0

摘要

河口渔业为许多家庭提供重要的生计,在世界范围内具有高度的区域社会经济重要性。对葡萄牙绿蟹(Carcinus maenas)渔业进行了评估,采用社会经济评估来了解该渔业的重要性,并使用种群评估分析来确定1960-2020年期间的渔业开发状况。渔民的知识表明,螃蟹捕捞是一项家庭事务,为数百个家庭提供了直接以螃蟹为目标的生计,在1960年至1990年期间,螃蟹出口到西班牙,后来几年,螃蟹作为章鱼捕捞的诱饵需求增加。尽管螃蟹具有重要的社会经济意义,但其渔业管理缺乏科学依据,螃蟹的经济价值一直保持不变。年捕捞量从未超过可持续捕获量,但由于螃蟹的经济价值低于其他渔业和监管障碍,螃蟹渔业的参与度下降。因此,在最大的河口捕鱼的渔民人数下降到20至30名老年人,渔业目前濒临灭绝。渔民们指出,减少最小登陆面积和执行专门针对螃蟹的捕蟹器规定是避免渔业衰退的方法。这种变化将刺激新的捕蟹渔民的招募,同时通过渔业多样化减少对其他河口资源的捕捞压力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sustainable Harvesting Alone Cannot Prevent Decline of the Green Crab Fishery in Portugal

Estuarine fisheries are of high regional socio-economic importance worldwide, by providing an important livelihood for many families. The Portuguese green crab (Carcinus maenas) fishery was assessed using a socio-economic assessment to understand the importance of the fishery and a stock assessment analysis to determine the exploitation status of the fishery during 1960–2020. Fisher knowledge revealed that crab fishing was a family affair that provided a livelihood for hundreds of families directly targeting crabs, with catches exported to Spain during 1960–1990s, and in later years, crab demand increased as bait for octopus fishing. Despite its socio-economic importance, the fishery was regulated without a scientific basis and economic value of crabs remained similar through time. Annual landings never exceeded sustainable catch rates, but engagement in the crab fishery declined due to low economic value of crabs compared to other fisheries and regulatory hurdles. Consequently, the number of fishermen declined to 20–30 elderly men fishing on the largest estuaries, with the fishery currently on the verge of extinction. Fishers pointed to a reduction in the minimum landing size and enforcement of crab-specific trap regulations as ways to avert fishery decline. Such changes would stimulate recruitment of new crab fishers, while reducing fishing pressure on other estuarine resources through fisheries diversification.

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来源期刊
Fisheries Management and Ecology
Fisheries Management and Ecology 农林科学-渔业
CiteScore
3.80
自引率
5.00%
发文量
77
审稿时长
12-24 weeks
期刊介绍: Fisheries Management and Ecology is a journal with an international perspective. It presents papers that cover all aspects of the management, ecology and conservation of inland, estuarine and coastal fisheries. The Journal aims to: foster an understanding of the maintenance, development and management of the conditions under which fish populations and communities thrive, and how they and their habitat can be conserved and enhanced; promote a thorough understanding of the dual nature of fisheries as valuable resources exploited for food, recreational and commercial purposes and as pivotal indicators of aquatic habitat quality and conservation status; help fisheries managers focus upon policy, management, operational, conservation and ecological issues; assist fisheries ecologists become more aware of the needs of managers for information, techniques, tools and concepts; integrate ecological studies with all aspects of management; ensure that the conservation of fisheries and their environments is a recurring theme in fisheries and aquatic management.
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