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根据2007年3-12月“开富”号拖网渔船在东南太平洋的生产统计数据和卫星遥感反演的海表温度数据,分析了智利竹筴鱼(Trachurus murphyi)的渔获量、网产量的季节变化,并探讨了单位捕捞努力量(CPUE)的时空分布格局及其与水温的关系。结果表明:CPUE在5-8月较高,其他月份相对较低,表现为冬季>秋季>春季>初夏。从全年来看,在海表温度12℃～14℃时,智利竹筴鱼的产量较高,其次为15℃～17℃。秋季渔场纬度分布较高(41°S-46°S);冬季渔场有所北移,分布于34°S-42°S,并向西转移至101°W;春季初期渔场继续西偏,随后向东转移,经度方向变化幅度达29°;初夏渔场有所南撤。总的来说,智利竹筴鱼渔场时空分布具有明显的季节变化,CPUE值波动范围较大。
According to the production statistics of trawlers in the Southeast Pacific Ocean from March to December 2007 and the sea surface temperature data retrieved from satellite remote sensing, the catch of Chilean catfish (Trachurus murphyi), net Seasonal changes in yield, and the spatial and temporal distribution pattern of unit fishing effort (CPUE) and its relationship with water temperature. The results showed that CPUE was higher in May-August and relatively lower in other months, showing as winter> autumn> spring> early summer. From the whole year, when the sea surface temperature is 12 ℃ ~ 14 ℃, the output of Chilean mackerel is higher, followed by 15 ℃ ~ 17 ℃. The latitudinal distribution of autumn fishery was higher (41 ° S-46 ° S). The winter fishery moved northward from 34 ° S to 42 ° S and westward to 101 ° W. The fishing ground continued to be westward in the early spring, Eastward shift, longitude direction of change of 29 °; early summer fisheries have been south to withdraw. In general, the temporal distribution of chile mackerel fishery in Chile has obvious seasonal changes and the range of CPUE fluctuates widely.