Larval parameters determining preschooling juvenile production of Pacific saury (Cololabis saira) in the northwestern Pacific
Larval parameters determining preschooling juvenile production of Pacific saury (Cololabis saira) in the northwestern Pacific
复制标题
决定西北太平洋秋刀鱼 (Cololabis saira) 学龄前幼鱼产量的幼虫参数
DOI：
10.1139/f97-013
复制
发表时间：
1997
影响因子：
2.4
通讯作者：
D. Kitagawa
中科院分区：
文献类型：
--
作者：
Yoshirô Watanabe;Y. Oozeki;D. Kitagawa
1990-1994年秋季，太平洋秋刀鱼(Cololabis Saira)孵化体型的幼体产量最高，这意味着该季节的产卵活动最高。在黑潮水域(本州以南)冬季产卵的种群的生长和死亡率是稳定的；在东北混合水域的秋季和春季产卵的种群中发现了不同的增长率。虽然在幼虫和幼虫阶段没有检测到特定的高死亡率时期，但通过幼虫和幼虫阶段的总体存活率在不同季节之间存在着一个数量级的差异。40 mm学龄前幼虫的产量取决于冬季队列中最小尺寸级的幼虫产量，但取决于春季和秋季队列中幼虫和幼虫阶段的总体存活率。在过去的44年里，冬季产卵的群体在商业渔获物中的百分比是稳定的，而秋季和春季产卵的群体的年际变化很大。这些..。
Production of larvae in the hatching size-class of Pacific saury (Cololabis saira) was highest in autumn 1990-1994, implying that spawning activity was highest in this season. Growth and mortality rates were stable in the winter-spawned cohorts in Kuroshio waters (south of Honshu); variable rates were found in the autumn- and spring-spawned cohorts in the mixed water region to the northeast. Although no particular period of high mortality was detected through the larval and juvenile stages, overall percent survival through the larval and juvenile stages differed by an order of magnitude among seasons. Production of 40-mm preschooling juveniles was determined by larval production in the smallest size-class in the winter cohort, but by overall percent survival through the larval and juvenile stages in the spring and autumn cohorts. Over the last 44 yr, percentage of winter-spawned cohorts in commercial catches was stable, compared with large interannual variations of autumn- and spring-spawned cohorts. Thes...