【摘要】 分别以不同水温15、20、25、30℃为4个试验组,研究糙海参成参的摄食和生长。试验结果表明:糙海参体重的增长与水温的变化密切相关;糙海参的最适生长水温为20~30℃,在25℃时生长最快,日增重量和日增重率分别为7.667 g和1.48%,而且显著高于其他试验组。在水温15℃时,日增重量和日增重率分别为0.1 g和0.022%,有时会出现负增长。当水温达到15℃时,糙海参摄食活动减少,停止摄食,体重不再增加。在水质因子研究方面,分为不换水试验组、换水1/3试验组(每日)、全部换水试验组(每日),研究了不同水质对糙海参生长的影响。经过15 d养殖,结果表明:其他水质指标波动在正常范围,3个试验组间无明显差别,只有NO2-含量有明显的差异。不换水组、换水1/3组和全部换水组的亚硝酸盐质量浓度分别是1.34 mg/L、0.55 mg/L和0.23 mg/L。亚硝酸盐质量浓度大小与海参生长有密切关系,两者呈负相关。全部换水组亚硝酸盐质量浓度显著低于其他试验组,糙海参生长最快;不换水试验组,部分糙海参日增重量和日增重率呈负增长,部分已经吐脏。更多还原

【Abstract】 The authors studied the effects of temperature and water quality on the growth of sea cucumber Holothuria scabra in the experiment.The sea cucumber was reared at 15,20,25 and 30 ℃ for 15 d in the tanks,and the body weight was measured.The results showed that the sea cucumber had daily increase in body weight of 0.1 g and daily growth rate of 0.022% at 15 ℃.At 20 ℃,they were 3.917 g and 0.830%;at 25 ℃,they were the best,individually 7.667 g and 1.48% from 20 ℃ to 30 ℃;at 30 ℃,they were 1.553 g and 0.428%.The sea cucumber had less food consumption without weight gain.The water quality pattern was divided into three groups: the group with no exchanged water,the group exchanged 1/3 water per day and the group exchanged all water per day.After culture in the tanks for 15 d,the daily growth rates were-3.304%,0.563%,1.638% in the three groups,respectively.The results showed the animal weight decreased in the group with no exchanged water.Among the water quality,we find that NO-2 was negatively correlated with the growth of the sea cucumber.NO-2 concentration(1.34 mg/L) in the group no exchanged water was higher than in the other two groups(0.55 mg/L,0.23 mg/L).更多还原