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本文研究了模拟运输过程中装载密度,运输时间、导温度和盐度对遮目鱼卵的影响。从遮目鱼亲鱼浮式网箱中收集卵并运至孵化场的过程中鱼卵所经历的震动情况是用实验室里的导轨式的震动器来模拟。装运袋中卵的密度大于7,000个/升,则会导致成活率的下降并相应降低孵化率。与不经受模拟运输的受精卵相比较长时问的鱼卵模拟运输震动也会降低受精卵的成活率和孵化率。除在20‰盐度时成活率相同之外,在20℃时,随着盐度的降低,卵的成活率逐步增加,而在进行试验的所有三个盐度值下,经过两小时模拟运输后,卵的成活率在28℃条件下较高。在模拟运输之后,不论盐度值的高低,运输温度28℃时的受精卵孵化率比20℃时的高。模拟运输后受精卵的孵化率,既不受运输过程中的盐度也不受它和温度相互作用的影响。这些结果表明,在模拟运输之后,受精遮目鱼卵成活率和孵化率受装载密度、运输时间、温度的影响并在某种程度上也受盐度的影响。根据这些结果,本文提供了处理和运输遮目鱼卵的指导意见。
In this paper, the effects of loading density, transport time, temperature and salinity on milkfish eggs were simulated. The vibrations experienced by the eggs during egg collection and transport to the hatchery from the mandarin fish floating cage were modeled using a lab-rail vibrator. An egg density of more than 7,000 per liter in the shipping bag will result in a decrease in survival and a corresponding decrease in hatchability. Simulated transport shocks of fish eggs over longer periods of time compared to fertilized eggs that do not undergo simulated transport also reduce fertilized egg survival and hatchability. In addition to the same survival rate at 20 ‰ salinity, egg survival increased gradually with decreasing salinity at 20 ° C and after two hours of simulated transport at all three salinity values under test After the survival rate of eggs at 28 ℃ higher. After simulated transport, the hatching rate of fertilized eggs at transport temperature 28 ℃ was higher than that at 20 ℃ regardless of the salinity value. Simulating the hatching rate of fertilized eggs after transport is neither affected by the salinity during transport nor by its interaction with temperature. These results indicate that after simulated transport, the survival and hatchability of fertilized milkfish eggs are affected by loading density, transport time, temperature and to some extent also by salinity. Based on these results, this article provides guidance on the handling and transport of milkfish eggs.