摘要
根据钱塘江三角鲂的渔获物信息,运用FiSATⅡ软件等方法对三角鲂的渔业生物学数据进行分析,估算钱塘江三角鲂的生长、死亡参数和种群资源的利用情况。结果表明:钱塘江三角鲂体长与体质量的幂函数关系为W=0.0142×L^(3.1303)(R^(2)=0.9793,P<0.001),Von Bertalanffy生长方程为L t=57.6×[1-e^(-0.18×(t+1.31))],三角鲂的生长拐点年龄为5.03 a。应用ELEFANⅠ法估算总死亡(Z)系数为1.04,估算自然死亡系数(M)为0.43,捕捞死亡系数(F)为0.61,开发率(E)为0.59;运用Beverton-Holt动态综合模型估算三角鲂的开捕体长为23.98 cm。研究结果显示,钱塘江三角鲂的种群资源利用面临一定的捕捞压力,但还处在可持续利用开发的状态。
In the present study,the data of Megalobrama terminalis from Qiantang River were analyzed by the FiSATⅡsoftware,and the growth and mortality parameters as well as the exploitation status of M.terminalis were obtained based on analysis of yield per recruitment(YPR)models.The results showed that the relationship between body length and body mass was expressed as W=0.0142×L^(3.1303)(R^(2)=0.9793,P<0.001),the Von Bertalanffy growth equation was selected as an optimal growth criteria and was expressed as L t=57.6×[1-e^(-0.18×(t+1.31))],and the growth inflexion point was 5.03 a.The total mortality rate(Z),natural mortality(M),fishing mortality rate(F)and the current exploitation(E)of M.terminalis were 1.04,0.43,0.61 and 0.59 by ELEFANⅠmethod,respectively.Moreover,the Beverton-Holt dynamic model was developed to predict the opening catch size of M.terminalis as 23.98 cm.The results of this study showed that the resources of M.terminalis in Qiantang River were utilized greatly and faced certain fishing pressure.
作者
郭爱环
练青平
罗伟
张爱菊
盛鹏程
原居林
GUO Aihuan;LIAN Qingping;LUO Wei;ZHANG Aiju;SHENG Pengcheng;YUAN Julin(Agriculture Ministry Key Laboratory of Healthy Freshwater Aquaculture,Zhejiang Institute of Freshwater Fisheries,Huzhou 313001,China)
出处
《渔业研究》
2022年第5期459-466,共8页
Journal of Fisheries Research
基金
浙江省农业农村厅财政专项(809、829)。
关键词
三角鲂
生长特性
单位补充量模型
种群资源
Megalobrama terminalis
growth characteristics
yield per recruitment model(YPR)
population resource
