Growth of sea bass, Dicentrarchus labrax, larval and juvenile stages and their otoliths under quasi-steady temperature conditions
Growth of sea bass, Dicentrarchus labrax, larval and juvenile stages and their otoliths under quasi-steady temperature conditions
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准稳态温度条件下鲈鱼、唇鱼、幼鱼和幼鱼阶段及其耳石的生长
DOI：
10.1007/bf00349553
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发表时间：
1994
期刊：
影响因子：
2.4
通讯作者：
J. Dulčić
中科院分区：
文献类型：
--
作者：
S. Regner;J. Dulčić
在相对稳定的温度条件下，研究了黑鲈幼鱼、幼鱼和幼鱼的体生长与耳石生长的关系。幼虫在13.5℃的恒定环境温度下孵育，幼虫后期和幼虫在18.6 ~ 20.4℃的相对稳定环境温度下孵育，平均温度为19.67℃。体细胞和耳石的生长模式是相似的。幼虫长度和耳石直径的差异数据表明它们的生长速度有三个时期的变化。由于实验期间温度保持相对稳定，并且幼虫是自由取食的，因此这些时期可以相对确定地归因于生长阶段特定时期的内在变化。两种生长速率的第三个变化阶段表明在变态过程中生长的一个特定阶段。生长速率的变化，以及幼虫长度和耳石直径生长的原始时间序列，可以用具有高概率水平的高阶多项式来描述。体长与耳石直径呈非线性关系，表明耳石正异速生长。我们还观察到异速生长系数在变态结束时发生了变化。因此，当从耳石生长反算体细胞生长时，应考虑到非线性关系和异速生长系数的变化。
The relationship between somatic growth and growth of otoliths of sea bass larvae, postlarvae and juveniles under relatively steady temperature conditions was studied. Larvae were incubated at the constant ambient temperature of 13.5°C, whereas postlarvae and juveniles were reared at a comparatively steady temperature ranging from 18.6 to 20.4°C, with a mean of 19.67°C. The patterns of both somatic and otolith growth were found to be similar. Differentiated data on larvae length and otolith diameters indicated three periods of change in their growth rates. Since temperature was kept relatively steady during the experiment, and larvae fed ad libitum, these periods could be attributed with relative certainty to intrinsic changes which occur during stage-specific periods of growth. The third period of change in both growth rates indicates a specific phase of growth during metamorphosis. The changes in growth rates, as well as the raw time series of the growth of both larval lengths and otolith diameters, may be described by higher order polynomials with a high degree of probability levels. A non-linear relationship between body length and otolith diameters was established, indicating positive allometric growth of otoliths. It was also observed that the coefficient of allometric growth changed at the time estimated for the end of metamorphosis. Thus, a non-linear relationship and changes in the coefficients of allometry should be borne in mind when back-calculating somatic growth from the growth of otoliths.