摘要
基于渔业资源调查数据,运用软件FiSATⅡ分析了鄱阳湖刀鲚繁殖群体的生物学参数及生长特性。分析结果表明,鄱阳湖刀鲚体长16.0~38.1cm;体长和体质量的关系式为m=0.002L3.139(r=0.949;P〈0.05;n=1014),von Bertalanffy生长方程的各参数为:渐近体长为40.95cm,生长系数为0.240,理论生长起点年龄t0=-0.568。鄱阳湖刀鲚的拐点体质量为67.94g,平均丰满度为0.29±0.04(0.14~0.49),总死亡系数为1.36a-1,自然死亡系数为0.52a-1,捕捞死亡系数为0.84a-1。鄱阳湖刀鲚开发率为0.61,处于资源过度利用状态。
Based on Poyang Lake fishery resources investigation data,preliminary assessment of biological parameters and growth feature in tapertail anchovy Coilia nasus was performanced using FiSAT II software.It was found that the length of tapertail anchovy population was ranged from 16.0to 38.1cm.The relationship between body length(cm)and body weight(g)was expressed as m =0.002L3.139(r=0.949;P0.05;n=1014);the estimated parameter for von Bertalanffy growth equation was L∞=40.95 cm,K= 0.240,t0=-0.568.The tapertail anchovy in the Poyang Lake had inflection point weight of 67.94 g.The average condition factor was 0.29±0.04(0.14—0.49).Total mortality(Z)was estimated as 1.36a-1,natural mortality(M)0.52a-1,and fishing mortality(F)0.84a-1.The exploitation rate of tapertail anchovy in the Poyang Lake was 0.61,in a state of overexploitation.
出处
《水产科学》
CAS
CSCD
北大核心
2016年第2期142-146,共5页
Fisheries Science
基金
鄱阳湖湿地与流域研究教育部重点实验室开放基金资助项目(PK2012003)
赣鄱英才555工程刀鲚调查专项基金资助项目
作者简介
吴斌(1984-),男,助理研究员,硕士;研究方向:渔业资源保护与开发.Email:wubinjx@163.com.
通讯作者:方春林(1960-),男,研究员;研究方向:鱼类营养与鱼类种质资.Email:chunlinf@163.com.