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首页> 外文期刊>Aquaculture Economics & Management >Economic analysis of netcage versus sea-bag production systems for salmon aquaculture in British Columbia.
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Economic analysis of netcage versus sea-bag production systems for salmon aquaculture in British Columbia.

机译：不列颠哥伦比亚省鲑鱼养殖网箱与海袋生产系统的经济分析。

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摘要

Conventional open netcage systems for salmon aquaculture are under scrutiny and criticism partially because they are believed to generate adverse environmental impacts on other resource users and the surrounding environment. One alternative to preventing or minimising these impacts is to use enclosed systems. Experience indicates that these enclosed systems are technically feasible and environmentally promising, but they are economically demanding because of high capital and operating costs. Therefore, an economic analysis of open netcage and sea-bag systems for salmon aquaculture was conducted to examine the profitability of salmon aquaculture operations between these two systems. The study shows that netcage systems are more financially profitable than sea-bag systems when environmental costs are either not or only partially considered. Sea-bag systems can be financially profitable only when they produce fish that achieve a price premium. Sensitivity analyses reveal that market price has the most important impact on the profitability of both systems; changes in discount rates, fish density, feed costs, and environmental costs also have major impacts on the profitability of netcage systems. Changes in the length of the growth cycle, survival rate, and feed conversion ratio have minor impacts on the profitability of sea-bag systems.
机译：鲑鱼养殖的传统开放式网箱系统受到审查和批评，部分原因是因为它们被认为会对其他资源使用者和周围环境产生不利的环境影响。防止或最小化这些影响的一种替代方法是使用封闭系统。经验表明，这些封闭系统在技术上是可行的，并且在环境方面很有希望，但是由于高昂的资金和运营成本，它们在经济上要求很高。因此，对鲑鱼养殖的开放式网箱和海袋系统进行了经济分析，以检验这两种系统之间鲑鱼养殖的利润。研究表明，在不考虑环境成本或仅考虑部分环境成本的情况下，网箱系统比海袋系统更具经济效益。海袋系统只有在生产出价格溢价的鱼时才能在财务上获利。敏感性分析表明，市场价格对两个系统的盈利能力都具有最重要的影响。贴现率，鱼密度，饲料成本和环境成本的变化也对网箱系统的盈利能力产生了重大影响。生长周期长度，成活率和饲料转化率的变化对海袋系统的盈利能力影响不大。

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