基于生物经济学模型的东南太平洋茎柔鱼管理策略探讨

Bio-economic Model for Dosidicus gigas in the southeast Pacific Ocean

利用2003—2012年茎柔鱼生产统计数据以及相关经济学参数,以Gordon-Schaefer生物经济模型为理论依据,以生态效益、经济效益和社会效益综合衡量作为其优化配置的基础,模拟在10种不同捕捞努力量方案下1 a、5 a、10 a、20 a茎柔鱼资源的优化配置结果,即累计的渔获量、利润和资源量状况。结果表明,捕捞努力量81和86万次方案的中长期经济效益较大,且保持在最大可持续产量时的资源量;而较大捕捞努力量（如111万次）方案短期社会效益虽好,但资源破坏严重且长期利益最低。研究认为,最适捕捞努力量应控制在81-86万次间。

The jumbo flying squid（Dosidicus gigas） is one of important economic cephalopod species. In order to ensure the sustainable utilization of fishery, reasonable management strategies should be made by considering ecological, economic and social benefits which based on Gordon-Schaefer bio-economic model. The catch data from China between 2003 and 2012,and 10 scenarios with different fishing effort was designed, which combined with biology, economy and society, accumulated benefit in 1 year, 5 years, 10 years, 20 years. The result shows that the scenarios 6 and the scenarios 7 bring great economic benefit in the medium in the long run and also keep the resource in the maximum sustainable yield. Although higher fishing effort（like scenarios 1 with 1,110,000 times of fishing） can bring better social benefits in the short run, it will badly destroy the resource and the long-term benefits. In conclusion, the most suitable fishing effort should be controlled between 810 000 to 860 000 times.