摘要
根据2005—2007年对长江上游攀枝花、宜宾、合江、木洞、万州江段渔业资源调查资料,运用体长频率分析法(FiSATⅡ软件)对长鳍吻鮈的生长、死亡参数进行估算。结果表明:长鳍吻鮈的体质量与体长的关系式为W=8×10-6L3.1577;用Shepherd技术拟合vonBertalanffy生长方程的各参数为L∞=530.5mm,K=0.21a-1,t0=-0.5a;根据Pauly经验公式得出自然死亡系数M=0.24,以长度变换渔获曲线法估算总死亡系数Z=2.67,捕捞死亡系数F=2.43;种群补充模式表明,长鳍吻鮈每年5—9月为主要补充期,开发率E=91.2%,长鳍吻鮈处于资源过度利用状态。
Based on the 2005-2007 investigation data of fishery resources in Panzhihua,Yibin,Hejiang,Mudong,and Wanzhou of the upper reaches of Yangtze River,and by using length-frequency method （FiSAT Ⅱ package）,this paper estimated the growth and mortality of Rhinogobio ventralis.The regression equation of the body weight and body length of R.ventralis could be expressed as W=8×10-6L3.1577,and the parameters in von Bertalanffy formula estimated by Shepherd’s method were L∞=530.5 mm,K=0.21 a-1,and t0=-0.5 a.The natural mortality coefficient calculated with Pauly’s empirical equation was M=0.24,the total mortality coefficient estimated by the length-converted catch curve was Z=2.67,and the fishing mortality coefficient was F=2.43.Recruitment pattern analysis indicated that R.ventralis had a recruitment period from May to September,its exploitation rate in recent years was 91.2%,and its resource was at the state of overexploitation.
出处
《生态学杂志》
CAS
CSCD
北大核心
2010年第7期1377-1381,共5页
Chinese Journal of Ecology
基金
中国科学院知识创新工程重大项目(KZCX1-YW-08-01)
国务院三峡工程建设委员会办公室生态环境资助项目(SX2007-019)
关键词
长江
长鳍吻鮈
生长
死亡
开发率
Yangtze River
Rhinogobio ventralis
growth
mortality
exploitation level
