根据2010年10月-12月金枪鱼渔业科学观察员采集的冰岛南部海域蓝鳍金枪鱼Thunnus thynnus生物学样品,对该鱼种的群体组成特征进行了分析.结果表明:蓝鳍金枪鱼叉长为154～ 230 cm,平均叉长为188 cm,优势叉长组为176～190 cm,占总数的67％；叉长(LF)与体质量(W)的关系可表达为W雌性=3×10-4 L2.4907F(R2=0.7698),W雌性=2×10-4L2.5204F(R2 =0.8335),W雌、雄混合样品=6×10-5L2.779F(R2=0.8452)；雌性性成熟个体约占雌性个体总数的86％,雄性性成熟个体占雄性个体总数的51.3％；蓝鳍金枪鱼摄食等级较低,0～1级内的个体约占样本总数的72.2％,摄食等级与性腺成熟度无显著相关性.%The biological characteristics of northern bluefin tuna Thunnus thynnus were studied using data collected by scientific observers on a tuna longline vessel in the south coastal area of Iceland from October to December in 2010. It was found that the fork length was ranged from 154 to 230 cm,with predominant 176-190 cm (accounting for 67%) and mean value of 188 cm. The relationship between fork length(LF) and body weight ( W) was expressed as W= 3 × 10-4 Zf4907 ( R2 = 0. 7698 ) for females, W = 2 × 10-4 ZF2.5204 ( R2 = 0. 8335 ) for males, and W = 6×l0-5LF779(R2=0. 8452) for the both sexes. About 86% of the sampled females were found to be mature while only 51. 3% of the males to be mature. The feeding grades of the bluefin tuna were lower, being dominated by degree 0 and degree 1 in about 72.2% of the total samples. No significant correlation was found between feeding degree and maturity.
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