七星鲈胚胎发育与水温关系的研究试验

Effects of Water Temperature on the Embryonic Development of Seven-star Fish Lateolaberx japonicus

关键词:  七星鲈  胚胎  发育  水温

Key words:  Lateolaberx japonicus  embryo  development  water temperature

摘要:

2006年12月15日至18日在福建东山岭南育苗场进行七星鲈(Lateolaberx japonicus)胚胎发育与水温关系的研究试验。试验设定水温为16~24℃,每个温度梯度为1℃,每个实验组设2个重复,每组加入受精卵100粒。结果显示,温度对七星鲈胚胎发育速度的影响非常明显,七星鲈胚胎发育进程随着温度的降低而延长,而且随着温度降低其胚胎发育时间的差值越大,当水温为17℃时,只要降低水温1℃就能让其胚胎发育时间延长10h以上,但是当水温为24℃时,降低1℃只能让胚胎发育延长约4h,低温对七星鲈胚胎发育进程的影响幅度更大。

Abstract:

The development of seven-star fish Lateolaberx japonicus embryo under various water temperatures were studied from 15 to 18 of december 2006,in Lingnan Hatchery in Dongshan,Fujian Provence,in which the test water temperature range was designed to be from 16 to 24℃ with a gradient of 1℃.Each test group was set to have two replica and 100 fertilized eggs were used in each single test.The results showed that water temperatures make evidently effective influence upon the development rate of this fish embryo with a feature of development retarding in the decrease in water temperature.Further more,the lower water temperatures can cause the wider the development retarding difference.when the water temperateres is 17℃,only 1℃ decrease could cause the fish embryo development to be retarded for more than 10h.Howerer,in the higher temperature such as 24℃,1℃ decrease could only prolong the embryo development for just 4h.These indicate that the effect of low temperatures upon the process of the development of seven-star fish embryo is greater than that of high temperature.