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根据2006~2007年南海北部海区4季的调查资料,分析该海区软骨鱼类的种类组成和资源密度的分布.结果表明,软骨鱼类有32种,分隶于9目17科,优势种为斑鳐、曾氏兔银鲛、褐黄扁魟、橙黄鲨;渔获率D断面最高(10.19kg/h),B断面最低(4.52kg/h);渔获率有明显的季节变动,夏季最高(12.16kg/h),秋季最低(3.71kg/h),平均渔获率为7.05kg/h;密集分布于180m和140m水深处;其年均资源密度为94.00kg/km2.文中并讨论合理利用和保护该类群的措施.
Based on the survey data of the northern South China Sea from 2006 to 2007, the species composition and resource density of the cartilaginous fishes were analyzed.The results showed that there were 32 species of cartilaginous fish, belonging to 9 families and 17 families, and the dominant species was Crabgrass, Zengshi silver 鲛, brown yellow flatfish, orange yellow shark; catch D highest section rate (10.19kg / h), B section minimum (4.52kg / h); catch rate has obvious seasonal changes in summer (12.16kg / h), the lowest in autumn (3.71kg / h), and the average catch rate was 7.05kg / h; the density was distributed in 180m and 140m water depths, and the average annual resource density was 94.00kg / km2. Measures for the rational use and protection of the taxa.