Can global aquaculture growth help to conserve wild fish stocks? Theory and empirical analysis

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-08-05 DOI:10.1111/nrm.12323

C. Bogmans, D. Soest

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引用次数: 1

Abstract

Can fed aquaculture growth alleviate overfishing and foster the conservation of wild fish stocks? To examine this question we present a stylized fishery model of trade in edible fish and fishmeal that incorporates both market linkages and biological (predator–prey) linkages between the aquaculture sector and capture fisheries. We study the effects of local aquaculture growth, as induced by an increase in aquaculture feed‐efficiency (technology shock), and of external or global aquaculture growth as experienced by either a drop in the price of edible fish or as an increase in the price of fishmeal (price shocks). While domestic (or “local”) aquaculture growth increases wild fish stocks due to positive market interactions, the effects of external (or “global”) aquaculture growth are generally ambiguous and depend on the strength of biological linkages. A stylized empirical application of the cod (predator) and capelin (prey) fisheries in the Barents Sea illustrates that the biological linkages between cod and capelin reduce the positive impact of aquaculture on cod conservation roughly by 50%.

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全球水产养殖的增长是否有助于保护野生鱼类种群？理论与实证分析

水产养殖的增长能否缓解过度捕捞，促进野生鱼类种群的保护？为了研究这个问题，我们提出了一个可食用鱼类和鱼粉贸易的程式化渔业模型，该模型结合了水产养殖部门和捕捞渔业之间的市场联系和生物（捕食者-猎物）联系。我们研究了当地水产养殖增长的影响，如水产养殖饲料效率的提高（技术冲击），以及外部或全球水产养殖增长对食用鱼价格下降或鱼粉价格上涨的影响（价格冲击）。虽然国内（或“本地”）水产养殖的增长由于积极的市场互动而增加了野生鱼类种群，但外部（或“全球”）水产养殖业增长的影响通常是模糊的，取决于生物联系的强度。巴伦支海鳕鱼（捕食者）和刺山柑（猎物）渔业的程式化经验应用表明，鳕鱼和刺山槟榔之间的生物联系将水产养殖对鳕鱼保护的积极影响降低了约50%。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.