北大西洋大青鲨年龄和生长初步研究  

A preliminary study on age and growth of the blue shark(Prionace glauca) in the North Atlantic Ocean

作　　者：高春霞[1] 戴小杰[1,2,3] 吴峰[1] 许友伟[1] 

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]上海海洋大学农业部大洋渔业资源环境科学观测实验站,上海201306 [3]上海海洋大学大洋渔业资源可持续开发省部共建教育部重点实验室,上海201306

出　　处：《上海海洋大学学报》2013年第1期120-127,共8页Journal of Shanghai Ocean University

基　　金：农业部三大洋金枪鱼观察员项目(08-54);上海市捕捞学重点学科建设项目(S30702)

摘　　要：大青鲨广泛分布在大西洋热带或温带水域,是金枪鱼延绳钓渔业的最主要兼捕种类。利用中国金枪鱼渔业科学观察员2010年10月～2011年3月在北大西洋(48°～52°N/15°～34°W,3°～15°N/34°～40°W)采集的524尾大青鲨样本(雄性328尾,雌性196尾)和相关数据,并随机选择51尾雄性(104～254 cm)和52尾雌性(135～211 cm)脊椎骨样本进行年龄鉴定,根据以上信息对大青鲨的年龄和生长进行研究。结果表明:叉长和脊椎骨半径的关系式为LF=192.8 Rv0.837;通过10%硝酸钴染色法观察脊椎骨轮纹,雄性的年龄范围为1～11a,雌性为3～7a;平均百分比误差指数为3.58%,鉴定精确度较高;采用实测的年龄-叉长数据估算大青鲨生长参数,雄性生长参数为L∞=289.4 cm,k=0.16,t0=-1.61;雌性生长参数为L∞=308.3 cm,k=0.13,t0=-1.77;雌雄大青鲨生长呈显著性差异(P<0.05),估计雌雄寿命分别为21.3a和17.1a。The blue shark Prionace glauca,is broadly distributed in temperate and tropical waters of the Atlantic Ocean,and is the main by-catch species in tuna long line fishery.A total of 524（328 males,196 females） blue sharks were sampled from Chinese tuna long line fisheries in the North Atlantic Ocean（48° to 52°N/15° to 34°W,3° to 15°N/34° to 40°W） from October 2010 to March 2011.Whole vertebrae of 51 males（104-256 cm） and 52 females（135-211 cm） were used to age for blue shark.Based such information from these samples,the age-growth of blue shark was analyzed in this study.The results showed that the relationship between fork length and vertebral radius for both sexes was as follows：LF=192.8 Rv0.837（n=117,R2=0.91）.Males were aged to 11 years（256 cm） and females were 7 years（211 cm）.The index of average percentage error（IAPE） ranged from 0-3.58% for 1-11 years.Parameters derived from observed length-at-age data for males and females were best to describe the growth of the blue shark.The von Bertalanffy growth parameters were：L∞=289.4 cm,k=0.16,t0=-1.61 for males,and L∞=308.3 cm,k=0.13,t0=-1.77 for females;differences in growth were found between sexes.The longevity for males and females were 21.3a and 17.1a,respectively.

关 键 词：大青鲨 年龄和生长 北大西洋 

分 类 号：S931.1[农业科学—渔业资源]