Comparison of somatic growth and otolith increment growth in laboratory-reared larvae of Pacific saury, Cololabis saira, under different temperature conditions
Comparison of somatic growth and otolith increment growth in laboratory-reared larvae of Pacific saury, Cololabis saira, under different temperature conditions
复制标题
不同温度条件下实验室饲养秋刀鱼幼体体细胞生长和耳石增量生长的比较
DOI：
10.1007/s002270050693
复制
发表时间：
2000
期刊：
影响因子：
2.4
通讯作者：
Yoshirô Watanabe
中科院分区：
文献类型：
--
作者：
Y. Oozeki;Yoshirô Watanabe
在实验室条件下，研究了秋刀鱼Cololabis saira（Brevoort）仔稚鱼0 ~ 9、10 ~ 20和20 ~ 30 d的体细胞生长与耳石增量生长的关系。在24、20和16 °C下孵育仔鱼，从孵化到9天。此外，最初在21.7 °C的环境温度下饲养的幼虫在第10天转移到22、18和14 °C的实验温度下并饲养到第20天，并且类似地从第20天开始并饲养到第30天。在三个实验结束时取样的幼虫的生长轨迹使用生物截距法进行反算，并与每个实验开始后0和5天的测量值进行比较。不同温度下的反算结果表明，除20 °C下孵化至9日龄幼虫和14 °C下20至30日龄幼虫的结长与实测值差异不显著外，其它温度下的结长与实测值差异不显著。本研究显示的体细胞生长与耳石生长之间的密切相关性表明，利用耳石读数估计秋刀鱼幼虫生长历史的可行性。
Abstract The relationship between somatic growth and incremental growth of otoliths of Pacific saury, Cololabis saira (Brevoort), larvae under different temperature conditions was studied in the laboratory for three age groups (0 to 9, 10 to 20 and 20 to 30 d posthatch). Larvae were incubated from hatching to 9 d at 24, 20, and 16 °C. Further, larvae initially reared at an ambient temperature of 21.7 °C were transferred to experimental temperatures of 22, 18, and 14 °C on Day 10 and reared to Day 20 and similarly from Day 20 and reared to Day 30 posthatch. Growth trajectories of larvae sampled at the end of the three experiments were back-calculated using the biological intercept method and compared to the measured values 0 and 5 d after the start of each experiment. Back-calculated knob length at the different temperatures indicated no significant difference to the measured knob lengths except for the cases at 20 °C from hatching to 9-d-old larvae and at 14 °C from 20- to 30-d-old larvae. The close correlation between somatic and otolith growth shown in this study indicated the feasibility of estimating the growth history of Pacific saury larvae using otolith readings.