北部湾条尾鲱鲤渔业生物学特征的研究

通过商业性捕捞取样，对北部湾条尾鲱鲤的渔业生物学特征进行了初步研究。结果表明北部湾条尾鲱鲤优势体长90～130mm，占65％；优势体重为20-40g，占56．4％；雌性个体平均体长大于雄性，性比为1．36：1，雌性个体数量不平衡；Von Bertalanffy生长方程的主要参数分别为：L∞=141．75mm，K=0.67，t0=-0．49；体重的生长拐点为1．27龄；总死亡系数、自然死亡系数和捕捞死亡系数分别为1．83、1．535和0．295，当前开发率为0．161。

Investigation on the Fishery Biology of Upeneus bensari in Beibu Gulf

The fishery biology of Upeneus bensari in Beibu Gulf was investigated catch sample. The result showed that the dominant length of the Upeneus bensari based on the commercial ranged from 90 mm to 130mm, accounting for 65 percent of the total, the dominant weight was between 20 g and 40 g, accounting for 56.4 percent of the total. The mean length of the female Upeneus bensari was larger than that of the male. The female was more than the male in population, the female-male ratio is 1.36：1. The estimated parameters for yon Bertalanffy growth function of the stock were L∞=141.75 mm,K=0.67 and t0=-0.49, respectively. The tuming point in body weight growth curve of the stock was situated at the age of 1.27. The instantaneous rates of total mortality, natural mortality and fishing mortality were 1.83, 1.535 and 0.295, respectively. The exploitation rate in recent years was 0.161.