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杂色鲍 (Haliotisdiversicolor)鲍苗体长 18.12～ 2 3.82mm ,体重 0 .98～ 2 .5 6g ,在 5种模式下进行养殖 ,即 :1)养殖用海水以不同方式进行前处理 ;2 )以 2 4h不同补水倍数 ;3)不同“倒池”次数 ;4 )不同投喂次数投喂细基江蓠 (Gracilariatenuistipitata) ;5 )不同产地、相同规格的鲍苗比较养殖。模式 1)～ 4 )养殖周期均为 6个月 ,鲍苗取自广东陆丰 ;模式 5 )养殖周期为 1个月 ,鲍苗分别取自福建东山、广东汕尾及广东陆丰的养鲍场。结果显示 ,直接抽取海水的养殖池 2 4h内有机沉积物含量分别为单过滤海水池和双重过滤海水池的 4 .9和 5 .1倍 ,而不同处理海水养殖池中有机沉积物与鲍苗的成活率呈密切相关 ;2 4h内的补水量对水体理化因子及杂色鲍成活率影响极显著 ,未换水组的氨氮含量、弧菌数分别为“5倍补水组”的 1.3和 6 .9倍 ,而死亡率则为后者的 2 1.7倍 ;未“倒池”组单位面积的有机沉积物分别为倒池 1、2、3次的 1.2、3.5和 3.6倍 ,氨氮含量分别为 1.73、2 .3和 3.5倍 ,弧菌数量比实验组要大 2～ 4个数量级 ;投喂方式、次数及停喂对水质影响十分明显 ,“3d投喂 1次 +停喂 1次”组的成活率高于其他组 (x2 >x20 .0 5,P <0 .0 5 ) ,水体中的氨氮比其他各组减少 14 9%～ 4 6 2 % ,而弧菌量减少 1
Haliotis diversiflora (Haliotis diversiflorus) was bred in 18.12 ~ 2 3.82mm and weighing 0.98 ~ 2.56g and cultured in 5 different modes, namely: 1) aquaculture was pretreated in different ways; 2) (4) different times of feeding; (4) feeding Gracilari discontinuistipitata at different feeding times; (5) breeding of abalone with the same specifications at different producing areas. Modes 1) ~ 4) The breeding cycles were all 6 months. The abalone was taken from Lufeng, Guangdong Province. Mode 5) The breeding period was 1 month. The abalone was collected from Dongba of Fujian Province, Shanwei of Guangdong Province and Yangfu of Guangdong Province. The results showed that the contents of organic sediments in the ponds directly pumping seawater for 24 h were 4.9 and 5.1 times higher than that of the single and double filter seawater pools respectively. However, The rate of rehydration within 24 hours had a significant effect on the physico-chemical factors of water body and the survival rate of Variegated abalone, while the contents of ammonia nitrogen and Vibrio spp. In non-water exchange group were 1.3 and 6 respectively .9 times and the mortality rate was 1.7 times that of the latter. The organic sediment per unit area in the “not inverted pond” group was 1.2, 3.5 and 3.6 times that of the inverted pond in the first, second and third times, respectively, and the ammonia nitrogen content was 1.73,2.3 and 3.5 times, the number of Vibrio was 2 ~ 4 orders of magnitude higher than that of experimental group. The mode of feeding, number of times and the effect of stopping feeding on water quality were very obvious. The group of “3d fed 1 + stopped 1” (X2> x20.0.5, P <0.05), the NH4 (superscript +) in water decreased by 14.9% ~ 46.2% compared with the other groups, while the Vibrio amount decreased by 1