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| 海冰对南极磷虾(Euphausua superba)资源丰度的影响 |
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陈 峰1, 陈新军1,2,3, 刘必林1,2,3, 朱国平1,2,3, 许柳雄1,2,3
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1.上海海洋大学海洋科学学院;2.大洋生物资源可持续开发和利用上海市高校重点实验室;3.大洋渔业资源可持续开发省部共建教育部重点实验室
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| 摘要: |
| 利用 1997—2008 年南极磷虾产量及各月南极海冰面积数据, 分析南极磷虾产量的时空分布, 以及海冰对南极磷虾资源丰度的影响。 结果表明, 近年来南极磷虾年平均产量在 11 万 t 左右, 主要来自 48 渔区, 渔汛期为 3—7 月。但不同渔区(48.1 区、48.2 区和 48.3 区)在不同年份和季节, 其产量和CPUE均有明显差异。分析认为, 48 区CPUE变动与上一年冬春季(7—11 月)海冰面积变化关系极为密切。相关分析表明, 48 区夏季磷虾 CPUE 与上一年冬春季(7—11 月)平均海冰面积呈现显著的负相关(r=-0.721, P<0.05), 特别是 9 月(r=-0.756, P<0.05)和 10 月(r=-0.674, P<0.05)。其海冰面积可解释 57.1%的 48 区夏季CPUE变动。 |
| 关键词: 南极磷虾, 南极的大西洋海区, 海冰面积, 回归模型 |
| DOI：10.11693/hyhz201104005005 |
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| 基金项目:国家高技术研究发展计划项目, 2007AA092201 号, 2007AA092202 号; 农业部南极磷虾探捕项目, D-8003-09-0158 号; 国家自然科学基金项目, NSFC40876090 号; 上海市捕捞学重点学科资助, S30702 号 |
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| EFFECT OF SEA ICE ON THE ABUNDANCE INDEX OF ANTARCTIC KRILL EUPHAUSUA SUPERBA |
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CHEN Feng1, CHEN Xin-Jun1,2,3, LIU Bi-Lin1,2,3, ZHU Guo-Ping1,2,3, XU Liu-Xiong1,2,3
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1.College of Marine Sciences, Shanghai Ocean University;2.The Key Laboratory of Shanghai Education Commission for Oceanic Fisheries Resources Exploitation;3.The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources (Shanghai Ocean University
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| Abstract: |
| Antarctic krill (Euphausua superba) is not only an important fishery target in the southern ocean, but also an important species of the southern ocean ecology. So, studying the effects of oceanic environment on the abundance of krill is vital. The study was to analyze the spatio-temporal distribution of krill catch and influence of sea ice on abundance of Antarctic krill using the global krill catch data from 1997 to 2008 and the corresponding monthly sea-ice extent in the Antarctic Ocean. The results suggest that the annual krill catch remained about 1.1×105 t in recent years, which dominatingly came from Area 48 from March to July. However, there were significantly differences in catch and CPUE of Antarctic krill in different subareas (48.1, 48.2 and 48.3), different years and seasons. Moreover, the analysis concluded that CPUE variation of krill of Area 48 was strong associated with variations in sea ice extents of the previous winter-spring (July—Nov.). Correlation analysis indicated that CPUE of spring in Area 48 was negatively related with the average sea ice extent of the previous winter-spring (July—Nov.) (r=-0.721, P<0.05), especially September (r=-0.756, P<0.05) and October (r=-0.674, P<0.05). Sea ice extent of the previous winter-spring could account for 57.1% of variability of CPUE for spring in Area 48. |
| Key words: Antarctic kril Euphausua superba, Atlantic sector of the Antarctic, Sea ice extent, Regression model |