A multi-species catch reduces risk and enhances stability in the fishery? Implications from a portfolio analysis of the Hokkaido setnet fishery
A multi-species catch reduces risk and enhances stability in the fishery? Implications from a portfolio analysis of the Hokkaido setnet fishery
复制标题
多品种捕捞可以降低风险并增强渔业稳定性？
DOI：
10.1007/s12562-022-01656-4
复制
发表时间：
2023
影响因子：
1.9
通讯作者：
Ishimura Gakushi
中科院分区：
文献类型：
--
作者：
Nakamura Kohsuke;Abe Keita;Ishimura Gakushi
大型定置网渔业是日本传统的多鱼种渔业。这种渔业对海产品行业保持稳定的年上岸量和在沿海地区创造就业至关重要。2018年渔业政策改革决定扩大总可捕量（TAC）管理物种，并引入基于单一物种的捕捞配额。这种数量管理可能导致对特定鱼种的上岸管制，从而可能破坏作为多鱼种渔业的大规模定置网渔业的收入。本研究通过应用渔业组合分析，对北海道函馆的大型定置网渔业实施基于单一鱼种的捕捞配额管理措施后，对特定鱼种实施登陆管制的影响进行了量化。研究结果表明，对太平洋柔鱼实施登陆管制后，与未实施登陆管制的情况相比，不仅平均收益减少了约52%，而且收益风险增加了约120%，投资组合效应从8.1下降到3.5。这些结果表明，由于基于单一物种的捕捞配额管理措施，对特定物种的登陆管制不仅减少了平均收入，而且使大规模定置网渔业的收入不稳定。
The large-scale setnet fishery is a traditional multispecies fishery in Japan. This fishery is vital to the seafood industry to maintain stable annual landing volume and create employment in coastal areas. The 2018 fisheries policy reforms decided to expand the total allowable catch (TAC) managed species and introduce single-species-based fishing quotas. Such quantitative management may lead to landing regulation on specific species, potentially destabilizing revenue of the large-scale setnet fishery as the multispecies fishery. This study has quantified the impact of landing regulation on specific species due to the management measures of single-species-based fishing quotas on revenue of the large-scale setnet fishery in Hakodate, Hokkaido, by applying the fishery portfolio analysis. The results show that, when landing regulation on Japanese flying squidTodarodes pacificus, not only is average revenue reduced by about 52%, but the revenue risk increased by about 120%, and the portfolio effect decreased from 8.1 to 3.5 compared with the case without landing regulation. These results indicate that landing regulation on specific species due to the management measures of single-species-based fishing quotas not only reduces average revenue but also destabilizes revenue from the large-scale setnet fishery.
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日本海海洋状况和渔业资源的现状
影响因子：
0.4
作者：
T. Kishida;H. Kidokoro
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DOI：
10.5026/jgeography.119.482
发表时间：
2010
期刊：
Chigaku Zasshi (jounal of Geography)
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DOI：
10.3739/rikusui.71.11
发表时间：
2010
期刊：
Japanese Journal of Limnology (rikusuigaku Zasshi)
影响因子：
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作者：
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通讯作者：
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