作　　者： ; ; ;

机构地区： 中国水产科学研究院东海水产研究所农业部海洋与河口渔业资源及生态重点开放实验室

出　　处： 《中国海洋大学学报（自然科学版）》 2011年第7期72-78,共7页

摘　　要： 根据2010年6～9月北太平洋柔鱼(Ommastrephe bartramii)渔业的现场调查资料,分析了北太平洋柔鱼胴长和体质量组成结构、性比、初次性成熟胴长、群体成熟度指数等等基础性的渔业生物学参数,阐述了该海域柔鱼的种群结构动态及繁殖生物学的特征。结果表明:各月北太平洋柔鱼生殖群体中雌性个体数量大于雄性,且雌性个体的平均胴长及体质量均显著大于雄性;生殖群体中雌、雄个体胴长与体质量关系的差异极为显著;相同胴长组下雄性个体的性成熟率要高于雌性;北太平洋柔鱼初次性成熟胴长ML50%♀为261.83 mm;ML50%♂为255.60 mm,雄性初次性成熟胴长显著小于雌性;东部海区(170°W～178°W)生殖群体比例及个体大小明显高于西部海区传统作业渔场(150°E～160°E)。判断东西部海区柔鱼是否是同一群体,还需要连续性的调查,进一步分析其成熟度随时间的变化及利用耳石信息分析技术来确定,还可以用微卫星技术测定分析以及标志放流法来判定,结论更为准确。 Based on the data of field investigation on neon flying Squid（Ommastrephe bartramii） fishery in North Pacific Ocean from May to September 2010,this paper studied the population structure and reproductive biology of neon flying squid in this area,with the evaluation of the monthly patterns in size and weight structure,sex ratio,mantle length at first maturity,and population maturity index.The results showed sa following： the reproductive populations in females always were larger than that of males of neon flying squid,the average mantle length and weight in females were significantly greater than those of males.Individual differences of relationship of males＇ and females＇ length and weight were extremely significant.The sexual rate of males was higher than that of females under the same mantle length group.261.83 mm was the mantle length at first maturity of females,and 255.60 mm was mantle length at first maturity of males,mantle length at first maturity of males was significantly less than that of females.Proportion of mature group and body size in the eastern area（170°W～178°W） were obviously higher than that in the western area（150°E～160°E）.To judge whether neon flying squids of the eastern and western areas were the same group or not,continuing investigation and further analysis on its maturity changing are still needed.Besides,statolith shapes information analysis technique,microsatellite technological,measurement analysis or logo discharge method can also be used to make an more accurate conclusion.

关 键 词： 柔鱼 北太平洋 种群结构 生殖群体 初次性成熟胴长

领　　域： [农业科学] [农业科学]