Age and growth of chub mackerel (Scomber japonicus) in the East China Sea and Yellow Sea using otoliths analysis
Chub mackerel (Scomberjaponicus) is a primary pelagic fish resource offChina waters.Growth is one of the most important factors that determine the dynamics of fish populations and influences the sustainable catch weight that can be taken from a stock.We studied the age and growth of chub mackerel in the East China Sea and Yellow Sea.Age was determined by interpreting and counting growth rings on the sagitta otoliths of 246 adult individuals caught in the commercial purse seine fleet during the period from November 2006 to January 2007,and 150 juveniles from bottom trawl survey in the spawning ground in May 2006.The difference between the assumed birth date of 1st April and date of capture was used to revise the age which determined by counting the number of complete translucent rings.The parameters of typical growth models,von Bertalanffy,logistic and Gompertz were estimated using the maximum likelihood method.Based on the Akalke Information Criterion (AIC),von Bertalnaffy growth function was considered as most appropriate model.The size-at-age and size-at-maturity values were found to decrease greatly compared with historical values,perhaps suggesting this population is overfished.
Scomber japonicus Age Growth Otolith Maximum likelihood AIC East China Sea Yellow Sea
Gang Li Xin iun Chen
College of Marine Science and Technology,Shanghai Fisheries University,No.334 Jungong Road,Shanghai 200090,China
国内会议
青岛
英文
257-267
2007-08-01（万方平台首次上网日期，不代表论文的发表时间）