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中文摘要：
根据2012年9月南海北部龙头鱼刺网的生产调查资料和现场取样数据，结合数理统计方法分析了龙头鱼的体长、体重组成分布等生物学特征。结果表明：龙头鱼体长组成基本呈现正态分布，优势体长组为200—210mm和210～220mm；体重组成没有明显的变化趋势，优势体重组为75～100g；体长与体重的关系为W=0．0007L^2.2026 加拍。本文还对该刺网的捕捞性能进行了初步研究，得出该网捕获的龙头鱼体长范围为166～252mm，最适体长为210mm，并由此计算出龙头鱼刺网的最适网目尺寸和最小网目尺寸分别为36mm和33mm。笔者经综合考虑各相关因素后建议龙头鱼刺网的网目尺寸应在最适网目尺寸的基础上适当地增大，并希望尽快制定南海区龙头鱼的开捕规格，以促进南海资源的可持续发展。
英文摘要：
Based on production investigation and sampling data by gillnet fishery for Harpadon nehereus in the northern part of the South China Sea in September 2012, length and weight distribution were analyzed with data analysis tool of Microsoft Excel. The results indicated： the length distribution of Harpadon nehereus was presented normally, and their dominant group of length was 200 -210 mm and 210 -220 mm; the weight distribution of Harpadon nehereu was different from the length, and their dominant group was 75 - 100 g ; the relationship between the length and the weight of Harpadon nehereus was W = 0. 000 7L^2.2026. Fishing capacity of this gillnet was analyzed preliminarily in this paper. The resuks indicated the optimum length of the gillnet fishery was 210 mm, and the length ranged from 166 mm to 252 mm; the optimum mesh size and the minimal mesh size was 36 mm and 33 mm respectively. Finally, to achieve sustainable development of gillnet fishery of Harpadon nehereu, the mesh size and must obtain the first capture size of Harpadon of the gillnet was suggested to be enlarged to over 40 mm, nehereu in the South China Sea.
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