印度洋西北部海域鸢乌贼资源密度分布的初步分析

Study on the resource density distribution of Symlectoteuthis oualaniensis in the northwestern Indian Ocean

根据2003年9-11月印度洋西北海域鸢乌贼资源的调查和渔获统计资料,采用效能比方法,对鸢乌贼资源密度指标CPUE值进行了估算。结果发现,在重点调查海域,鸢乌贼的资源密度较高,其CPUE值为0.01～10.0尾/线/h,总平均值为2.456尾/线/h。资源密度的分布随海域而不同。在12°N以南海域CPUE值一般在1.0尾/线/h以下,在12°～14°N、58°～61°E间海域CPUE值在2.0～2.5尾/线/h,而在中心渔场16°N、61°E附近海域,CPUE值为最高,达到5.5尾/线/h以上。

Based on the investigation and the catch of Symlectoteuthis oualaniensis in the northwestern Indian Ocean from September to November in 2003, the resource density index (CPUE) is calculated by the way of efficiency ratio. The results indicate that the resource density is relatively high in the main investigation area, the value of CPUE ranges from 0.01 to 10 squids per line in one hour and the average CPUE is 2.456. The resource density varies with different fishing areas. In the south of 12°N, the CPUE is below 1.0 squids per line in one hour. In the area of 12°N～14°N,58°E～61°E, the CPUE is between 2.0 and 2.5, and in the central fishing area around 16°N,61°E, the CPUE is the highest, which is more than 5.5.