中国水产科学2012，Vol.19Issue(4)：679-689,11.DOI:10.3724/SP.J.1118.2012.00679
热带印度洋大眼金枪鱼渔场时空分布与温跃层关系
Relationship between the temporal-spatial distribution of fish in bigeye tuna fishing grounds and the thermocline characteristics in the tropical Indian Ocean
摘要
Abstract
This study plotted spatial overlay maps to analyze the relationship between bigeye tuna (Thunnus obesus) distribution in fishing grounds in the tropical Indian Ocean and thermocline characteristics, calculated from monthly temperature profile data from Argo buoys and the monthly CPUE (catch per unit effort) from bigeye tuna longlines. Seasonal variability was observed in the depth of the upper boundary temperature and in the lower boundary depth. Our analysis suggested that the distribution of bigeye tuna was related to these seasonal variations of the thermocline. The range of the upper boundary depth for high CPUE during the summer monsoon was 30-50 m, which was lower than in the winter (50-70 m). A higher CPUE was found from northern Madagascar to Somalia where the lower boundary depth was at 170-200 m. Where the lower boundary depth was more than 300 m, the value of CPUE was low. The range of upper boundary temperatures in the higher CPUE fishing grounds was 27-30 m during the winter monsoon and 24-30 m the summer monsoon. Frequency analysis and the empirical cumulative distribution function (ECDF) were used to compute the optimum range of thermocline characteristics. The optimum depth range of the upper boundary temperature was 26-29 m and the for the lower boundary temperature, it was 13-15 m. The optimum range of the upper boundary depth was 30-60 m and the lower boundary depth was 140-170 m. The conclusions were confirmed using Kolmogorov-Smirnov test. The suitable distribution interval and seasonal change characterize of each thermocline in the central fishing ground of bigeye tuna were preliminary obtained in this paper. The results could provide reference to longline production operation in sea and resource management.关键词
大眼金枪鱼/温跃层/印度洋/ArgoKey words
bigeye tuna/ thermocline/ Indian Ocean/ Argo分类
农业科技引用本文复制引用
杨胜龙,张禹,樊伟,戴阳..热带印度洋大眼金枪鱼渔场时空分布与温跃层关系[J].中国水产科学,2012,19(4):679-689,11.基金项目
国家863计划项目(2007AA092202) （2007AA092202）
中央级公益性科研院所基本业务费(2009T08,2008M19, 2011T10) （2009T08,2008M19, 2011T10）
资源与环境信息系统国家重点实验室开放基金(2010KF0005SA). （2010KF0005SA）
