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。
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 ×10^5 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.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
2011年第4期495-499,共5页
Oceanologia Et Limnologia Sinica
基金
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
关键词
南极磷虾
南极的大西洋海区
海冰面积
回归模型
Antarctic kril Euphausua superba, Atlantic sector of the Antarctic, Sea ice extent, Regression model
