Biological Feature of the purpleback flying squid Sthenoeuthis oualaniensis in the South China Sea

• 作 者: JIANG Yan-e ZHANG Peng LIN Zhao-jin QIU Yong-song FANG Zhan-qiang CHEN Zuo-zhi
• 机 构: Scientific Observing and Experimental Station of South China Sea Fishery Resources and Environment,M
• 出 处: 2014年度中国水产学会渔业资源与环境分会学术年会
• 发表日期: 2014年11期
• 关键词: Sthenoeuthis oualaniensis biology South China Sea

　　Preliminary study of biological features of Sthenoenthis oualaniensis were carried out with 780 specimens randomly captured from South China Sea during the months of September and December,2012.The range of mantle length (ML) is 69~143 mm in male, and 59~225 mm in female.The range of body weight (BW) is 10.33~142.97 g in male, and 6.28~631.94 g in female.The relationships between ML and BW could be described by power functions in both sexes.The sex ratio was 1.13:l(Male/Female), and the highest record of female was in the southwest of Xisha Islands water area.The mature ratio was 1.13:l(Immature/Mature), and the highest record was in the southwest of Nansha Islands water area.The length frequency distribution of the mature female was between 81~270 mm, dominant in 91~100 and 151~270, and the male was between 81~160 ram, dominant in 81~90 mm and 111~160 mm.The feeding factor (FF) in September was higher than that in October in both sexes.As calculated by site, they were range from 2.36 (site 18) ~ 8.72(site 35) in female, 1.54(site 18) ~ 8.50(site 16) in male.The gonadosomatic index (GSI) in September was higher than that in October in female, but a little lower than that in October in male.These records were range from 0.26 (site 8) ~ 4.55(site 36) in female, 2.24(site 16)~ 4.4(site 36) by site.Resluts discussed in this paper may be good for assessment and management of S.oualaniensis recource in South China Sea.