文章摘要
高春霞,戴小杰,吴 峰,许友伟.北大西洋大青鲨年龄和生长初步研究[J].上海海洋大学学报,2013,22(1):120-127
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
  
DOI:
中文关键词: 大青鲨  年龄和生长  北大西洋
英文关键词: Prionace glauca  age and growth  North Atlantic Ocean
基金项目: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)
作者单位
高春霞 上海海洋大学 海洋科学学院 
戴小杰 上海海洋大学 海洋科学学院 
吴 峰 上海海洋大学 海洋科学学院 
许友伟 上海海洋大学 海洋科学学院 
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中文摘要:
      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 Rv=0.837;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。
英文摘要:
      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 Rv=0.837(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.
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