长江口脊尾白虾渔业资源特征和生殖习性

Stock Characteristics and Reproductive Habits of Exopalaemon carinicauda in Changjiang River Estuary

本文报道了１９８５年８月～１９８６年７月长江口脊尾白虾体长分布和生殖习性，并应用ＥＬＥＦＡＮⅠ和ＥＬＥＦＡＮⅡ技术分析了每月的体长组成资料，分别估算了雌、雄虾和混合标本的生长参数、自然死亡系数、总死亡系数、利用率及补充类型等渔业资源特征。提出了长江Ｄ脊尾白虾的繁殖时间和所对应的体长范围及温、盐度条件。讨论了各渔业资源参数的适用性及补充类型与繁殖习性的关系。

Based on length-frequency data of Exopaleamon carinicauda collected in Changjiang River estuary from Ausust, 1985 to July, 1986, the length-frequency distribution and reproductive characteristics of the population were reported, monthly length-frequency data wre analysed by uSing ELEFAN Ⅰ and ELEFAN Ⅱ techniques,and growth parameters K and L∞, natural mortality M,total mortality Z,exploitation rate E and recruitment pattern were estimated separately according to the female, male and combined shrimp. The reproduction time and the range of reproductive body-length, temperature and Salinity during reproduction of the population were presented. Lastly discuSSion was made on appropriateness of the various bioiosical parameters and the relationship between recruiment Pattern and reproductive characteristics.