南海北部金线鱼延绳钓渔获分析

Analysis on the catches of Nemipterus virgatus longline in the northern South China Sea

根据2007年8—9月的海上生产调查数据，对南海北部母子式金线鱼延绳钓渔获情况进行了初步分析。结果显示，金线鱼、深水金线鱼和长尾大眼鲷为渔获优势种，其相对重要性指标（IRI）分别为7518．10、3446．33和2052．65；渔获平均体长分别为203mm、129mm和264mm；平均体重分别为190g,57g和426g：渔获物的优势体长组分别为160～240mm、100～160mm和230～270mm；平均上钩率分别为0．96％、0．96％和0．19％；方差分析未显示此3种鱼在早晨、中午和傍晚不同时段的上钩率有显著差异。

Based on the investigation during August-September 2007, the catches of mothership carries small Nemipterus virgatus longliner in the northern South China Sea were preliminarily analyzed. Results showed, Nemipterus virgatus, Nemipterus bathybius and Priacanthus tayenus were the dominant species; their Index of Relative Importance （IRI） were 7 518.10, 3 446.33, and 2 052.65 respectively; their average body length were 203mm, 129mm, and 264mm respectively; their average weight 190g, 57g, and 426g respectively; their dominant body length were 160 - 240mm, 100 - 160ram, and 230 - 270mm respectively; their average catch rate 0.96% , 0.96% , and 0.19% respectively ; variance analysis on the catch rate of the three species in the morning, noon, and evening has not shown significant differences.