Growth and mortality rates of yellowfin tuna Thunnus albacares (Perciformes: Scombridae)in the central Atlantic Ocean
Biological parameters such as age,growth and age(or size)at maturity are vital for accurate stock assessments and management planning of sustainable fisheries.Despite this,very few validated age studies have been conducted for large tropical pelagic species in the central Atlantic Ocean.The objective of our study was to estimate yellowfin tuna age and growth rate in the central Atlantic Ocean using fork length data and ELEFAN Ⅰ technique.Growth and mortality parameters were estimated for yellowfin tuna sampled from Chinese longliners fishing in the central Atlantic Ocean during February 2001 to June 2002.The von Bertalanffy growth parameters were estimated at L∞ =212.63 cm fork length,k =0.40 a-1,and theoretical age at zero length t0 =-0.39 year.The natural mortality calculated by Pauly” s empirical equation was M =0.55.The total mortality estimated by length-converted catch curve was Z =2.57 and the fishing mortality was F =2.52.The exploitation rate of yellowfin tuna in the central Atlantic Ocean is E =0.91.
Yellowfin tuna Thunnus albacares growth mortality central Atlantic Ocean Size frequency analysis
ZHU Guo-ping XU Liu-xiong ZHOU Ying-qi CHEN Xin-jun
The Key Laboratory of Shanghai Education Commission for Oceanic Fisheries Resources Exploitation,College of Marine Sciences,Shanghai Ocean University,Shanghai 200090,China
国内会议
上海
英文
81-90
2008-09-26（万方平台首次上网日期，不代表论文的发表时间）