摘要
本文研究了温度、盐度和饵料对米来西鱼苗成活率和生长的影响。鱼苗在盐度分别为0、16‰和31‰,温度为17°～18℃的水体中呼吸代谢的试验结果表明,由于鱼苗从淡水体直接放进盐度为31%的水体,不能够适应盐度迅速剧烈的改变,呼吸代谢严重失调,鱼苗一天内全部死亡。在盐度为0和16‰的水体中,成活率很高(均在85%以上)。生长试验表明:盐度为0和16‰对生长的影响无论在20～25℃或35℃条件下,其差异并不显著。温度对生长的影响极大,35℃水温是鱼苗生长的最适温度,其生长比在20～25℃条件下快25～55%。食物类型对生长影响的试验表明,动物性饵料比颗粒性饵料提高生长40～70%。
This paper reports the effects of temperature, salinity and feed on survival rate and growth of young fish of Tilapia sp.In respiration experiment, the fish were exposed to water of salinity of 0‰, 16‰ and 31‰ at water temperature of 17-18℃, the results show, that young fish were not able to adaptate rapid and severe change of salinity, when they were put into water of 31‰ salinity from freshwater, respiration metabolism is imbalanced and all fish died within one day. In water of salinity of 0 ‰ and 16‰, survival rate is very high (>85%). Results of growth experiment indicated, that the difference of growth rate of fish reared in water with salinity of 0‰ and 16‰ at 20-25℃ or at 30℃ is' nt Significance. Effect of temperature on growth of young fish is quite obvious. Optimal water temperature for the growth of young fish is 35℃ At 35℃ growth rate was greater, than that of 20-25℃ at Salinity of 25-55‰. Experiment on the effect of food type on growth shows, that animal feed increaced growth by 40-70% than the pellet.
出处
《海洋湖沼通报》
CSCD
北大核心
1990年第1期57-63,共7页
Transactions of Oceanology and Limnology
