Growth of larval and early juvenile Japanese anchovy, Engraulis japonicus, in the Kuroshio-Oyashio transition region
Growth of larval and early juvenile Japanese anchovy, Engraulis japonicus, in the Kuroshio-Oyashio transition region
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DOI：
10.1046/j.1365-2419.2001.00160.x
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发表时间：
2001-06-01
影响因子：
2.6
通讯作者：
Watanabe, C
中科院分区：
文献类型：
--
作者：
Takahashi, M;Watanabe, Y;Watanabe, C
1996年和1997年，在日本北方黑潮-俄亥俄过渡区，日本鳀鱼的幼虫、幼鱼和成虫分布于170 ° E的近海。根据耳石半径与体长的异速生长关系，采用生物截距法反算了仔稚鱼个体的生长轨迹。幼虫的平均生长速率在0.49 ~ 0.71 mm/d之间，与日本中部太平洋沿岸沃茨的结果相当。- 是的就生长而言，黑潮-俄亥俄过渡区似乎是幼鱼的有利育苗区。- 是的在过渡区，从近岸到离岸沃茨，幼虫生长呈下降趋势。热条件没有显示在调查区的近岸-近海趋势，并没有解释增长率的纵向趋势。
Larvae, juveniles, and adults of Japanese anchovy, Engraulis japonicus, were distributed throughout the Kuroshio-Oyashio transition region off northern Japan as far offshore as 170 degreesE in 1996 and 1997. The growth trajectories of individual larvae and early juveniles were backcalculated using the biological intercept method based on the allometric relationship between otolith radius and somatic length. Mean larval growth rates ranged from 0.49 to 0.71 mm day(-1) in the transition region, and were comparable to those reported from the Pacific coastal waters of central Japan, which is the principal distribution range of E. japonicus. In terms of growth, the Kuroshio-Oyashio transition region seemed to be a favourable nursery area for larval E. japonicus. Larval growth tended to decline from the inshore to the offshore waters in the transition region. Thermal conditions did not show an inshore-offshore trend in the survey area and did not explain the longitudinal trend in growth rates.