基于渔获量平均营养级的东南大西洋渔业资源状况分析

发布时间：2019-04-20 14:30

【摘要】：根据联合国粮农组织提供的1950~2012年东南大西洋渔获量连续统计数据,结合Fishbase提供的相关渔获物的营养级(TL),探讨了63年间东南大西洋渔获量平均营养级(MTL)的变化情况,以此来判断东南大西洋渔业资源状况。研究认为,MTL变动大致可分三个阶段:(1)1950~1963年,MTL呈现下降趋势,降低至历史最低点的2.80;(2)1963~1972年,MTL呈现急剧上升趋势,增至第一个高峰值3.49;(3)1972~2012年大部分年份(85.4%)MTL都在3.30~3.50之间波动,其中1996年达到历史最高点的3.60。东南大西洋渔获物Fi B指数总体上呈现先升高后降低的趋势。1950~1963年,Fi B小幅波动增长;1963~1972年,Fi B呈现急剧上升趋势;1972~2012年,Fi B呈现平稳下降趋势。研究认为,东南大西洋海洋生态系统未被破坏,渔业资源处于未充分开发状态,仍然有较好的开发和利用潜力。
[Abstract]:Based on the continuous statistical data of catches in the southeast Atlantic from 1950 to 2012 provided by the Food and Agriculture Organization of the United Nations, and combined with the nutrient-level (TL), of the related catches provided by Fishbase, the variation of the average nutrient-grade (MTL) of the catches in the southeast Atlantic over the course of 63 years was studied. So as to judge the state of fisheries resources in the southeast Atlantic. The results show that the change of MTL can be divided into three stages: (1) from 1950 to 1963, MTL showed a downward trend to the lowest point of 2.80; (2) from 1963 to 1972, MTL increased sharply to the first peak of 3.49; (3) MTL fluctuated between 3.30 and 3.50 in most of the years (85.4%) from 1972 to 2012, and reached an all-time high of 3.60 in 1996. The Fi B index of fishing catch in the southeast Atlantic showed a trend of rising first and then decreasing. The, Fi B fluctuated slightly from 1950 to 1963; the, Fi B increased sharply from 1963 to 1972; and the, Fi B showed a steady downward trend from 1972 to 2012. The results show that the marine ecosystem of the southeast Atlantic Ocean has not been destroyed and the fishery resources are under-exploited, and there is still a good potential for exploitation and utilization of the marine ecosystem in the South-East Atlantic Ocean.
【作者单位】：上海海洋大学海洋科学学院;国家远洋渔业工程技术研究中心;大洋渔业资源可持续开发省部共建教育部重点实验室;远洋渔业协同创新中心;中国水产科学研究院资源与环境研究中心;
【基金】：国家自然科学基金(NFSC41306127,NSFC41276156) 上海市自然科学基金(13ZR1419700) 上海市教委创新项目(13YZ091) 教育部博士点基金(20133104120001) 大洋渔业可持续开发教育部重点实验室开放基金(S30702)
【分类号】：S932.4

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