黄姑鱼胚胎发育及其与温度和盐度的关系

Embryonic development of Nibea albiflora and the effects of temperature and salinity on embryogenesis

为研究温度和盐度对黄姑鱼(Nibea albiflora)胚胎发育的影响,作者观察了黄姑鱼受精卵的形态和胚胎发育过程。实验结果表明,温度18~28℃范围内,温度对孵化时间和初孵仔鱼有显著影响,对孵化率影响不大,24~28℃是黄姑鱼胚胎发育的适宜温度范围;盐度低于24时受精卵下沉,26~28内悬浮于水体中,盐度高于34时受精卵浮于水面;黄姑鱼胚胎发育的最适盐度范围26~32,盐度超过或低于其适宜范围时,孵化率明显下降或者幼虫畸形率明显增大。另外,根据其Q10值推算的胚胎发育的适宜水温与实验结果相似。

This study investigated the embryology and the effects of temperature and salinity on the early develop-ment of the potted maigre Nibea albiflora. The results showed that temperature （18–28℃） significantly influenced the hatching time and the hatched larvae, but the impact on the hatching rate was not significant. The temperature range of 24–28℃ was appropriate for embryonic development. The optimum salinity range was 26–32 for the em-bryonic development, and higher or lower salinity resulted in a lower hatching rate or higher larval deformity rate. The fertilized eggs sunk in water （at salinity lower than 34）, suspended in water （at salinity 26–28）, and floated on water （at salinity higher than 34）. In addition, according to the results of Q10 calculation, the appropriate water temperature for embryonic development was similar to the experimental results.