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根据2009年5～7月和2010年4～7月西北太平洋公海秋刀鱼海上调查数据,对西北太平洋公海秋刀鱼生物学特性进行了初步的研究。主要结果表明:2009年叉长范围为161～333mm,优势叉长组为260～320mm;2010年叉长范围为108～344mm,优势叉长组为240～300mm.经方差分析2009年和2010年叉长分布存在显著性差异,各年间雌雄叉长分布也存在显著性差异,但同时摄氏等级的年间差异不明显。2009年和2010年雌雄比分别为1.32和1.18。2年性腺成熟度都以Ⅱ、Ⅲ期为主。摄食等级都以1、2、3期为主,发现了空胃现象。2009年体质量范围为21-257g,2010年体质量范围为9-220g,2年间体质量分布存在显著性差异。通过方差分析2009年和2010间体长与体质量之间的关系存在显著性差异,说明这两年的秋刀鱼可能属于不同的种群。
According to the survey data of Pacific saury from May to July in 2009 and April to July in 2010, the biological characteristics of Pacific saury in the Northwest Pacific Ocean were studied. The main results showed that the range of fork length was 161 ~ 333mm in 2009, the length of superior fork was 260 ~ 320mm, the range of fork length was 108 ~ 344mm in 2010, and the length of advantage fork was 240 ~ 300mm.Analysis of variance in 2009 and 2010 There are significant differences in the distribution of the length of the forks. There are also significant differences in the distribution of the length of the male and female forks in each year, but the difference in the degrees of the celsius is not obvious at the same time. The ratio of male to female in 2009 and 2010 was 1.32 and 1.18 respectively. The gonadal maturity was mainly in stages Ⅱ and Ⅲ. Feeding stage to 1,2,3-based, found the empty stomach phenomenon. 2009 body mass range of 21-257g, 2010 body mass range of 9-220g, 2 years body mass distribution there is a significant difference. There was a significant difference between body length and body mass by means of analysis of variance in 2009 and 2010, indicating that Pacific saury may belong to different populations in these two years.