科研之友
微信
新浪微博
Facebook
分享链接
摘要
Largehead hairtail, Trichiurus lepturus, fishery status in the East China Sea was estimated using length frequencies data sets for 2001, 2004, 2009 and 2013 and catch and effort data from 2000 similar to 2012. Length frequency data for 8,350 individuals were collected using pair trawl nets. The predominant size classes in the catch comprised of 130-374 mm in 2001, 83-360 mm in 2004, 53-355 mm in 2009, and 23-389 mm in 2013. Growth parameters of asymptotic length ranged from 515.6 to 768.6 mm in 2004 and 2009, growth coefficients ranged from 0.230 to 0.685, and t(0) from -0.654 to -0.494. The rate of total mortality (Z) ranged from 0.82 to 2.73 year(-1) in 2013 and 2001, respectively. The exploitation rate was estimated to range from 0.660-0.797 year(-1). Catch per unit effort estimates showed a consistent decline in catches. This study is a start to bridge the gap between data and information, allowing resource managers to determine management priorities for this economically and ecologically important species in the ECS.
