Growth and daily otolith increments of reared round herring Etrumeus teles larvae
Growth and daily otolith increments of reared round herring Etrumeus teles larvae
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饲养的圆鲱 Etrumeus teles 幼虫的生长和每日耳石增量
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
K. Kawaguchi
中科院分区：
文献类型：
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作者：
Amane Hayashit;K. Kawaguchi
野外采集的浮游生物主要由桡足类无节幼体和桡足类组成，大小范围为50-150μm。详细的采样和饲养方法已在别处描述1)。孵化后2-3天观察第一次喂食。每五天处死 5 只幼虫用于观察箭矢。测量标准长度（SL）和干体重。用600倍放大倍数的光学显微镜对耳石增量的数量进行计数。孵化后前 25 天的 SL 生长和干体重如图 1 所示。由于增量的可见性与日本沙丁鱼幼虫一样清晰，因此未通过 SEM 检查光学显微镜计数。耳石增量数 (N) 与孵化后天数 (D) 之间的关系如图 2 所示。两种回归均被证明为：
The field-collected plankton were mainly composed of copepod nauplii and copepodites with size a range of 50-150μm. The detailed sampling and rearing method were described elsewhere1). The first feeding was observed 2-3 days after hatching. Five larvae were sacrificed for the observation of sagitta every five days. Standard length (SL) and dry body weight were measured. The number of otolith increments was counted with light microscopy of 600 •~ magnification. Growth of SL and dry body weight during the first 25 days after hatching are shown in Fig. 1. Because visibility of increments were clear as in Japanese sardine larvae, light microscopy counts were not examined by SEM. The relationship between number of otolith increments (N) and days after hatching (D) is shown in Fig. 2. Both regressions were demonstrated as: