摘要
研究了达氏鳇(Huso dauricus)(♀)与欧洲鳇(Huso huso)(♂)杂交仔鱼在循环水养殖系统中,不同放养密度对其生长和存活的影响。试验设计了4组不同处理,设置放养密度分别为0.3万尾/m3、0.7万尾/m3、1.0万尾/m3/L、1.3万尾/m3,每个密度组设置3个重复,为期30 d。结果表明:杂交鲟仔鱼生长速度受放养密度影响较大,放养密度在0.3～0.7万尾/m3,杂交鲟仔鱼的最终体重、特定生长率、日增重都随着放养密度的增大而升高,当养殖放养达到0.7万尾/m3时,进一步增加放养密度,仔鱼的生长反而下降,高密度组(1.0～1.3万尾/m3)杂交鲟仔鱼个体生长速度离散度明显加大,仔鱼的成活率随放养密度增加而下降。综合认为,在循环水养殖条件下,0.7万尾/m3放养密度组杂交鲟生长效果较具优势。
Researching on the influence of breeding density on feeding, growth and survival rate of Huso dauricus （ ♀ ） and Huso huso （ ♂ ） hybird fry in recirculating aquaculture system. The test has designed four different groups, the breeding density were 3 000 ind/m3, 7 000 ind/m3, 10 000 ind/m3, 13 000 ind/m3, each density group set up three repeat period for 20 days. The results show that the hybrid fry＇ s growth rate influenced by the breeding density is bigger, the breeding density is between 3 000 ind/m3 to 7 000 ind/m3, the final weight of hybrid fry, specific growth rate, daily weight gain is growing along with the increase of the breeding density increase. When the breeding density up to 7 000 ind/m3, the weight growth will drop when increase the breeding density furthermore, hybrid fry growth discrete degree of high density group （ 10 000- 13 000 ind/ m3） increase obviously, the survival rate decreased with the increase of breeding density. Comprehensive think in recirculating aquaculture conditions, the growth of hybrid sturgeon in the breeding density of 7 000 ind/m3 has more advantages.
出处
《渔业现代化》
北大核心
2013年第2期12-16,共5页
Fishery Modernization
基金
"十二五"国家科技支撑计划项目"淡水鱼类工厂化养殖系统技术集成与示范"(2012BAD25B03)
国家科技支撑计划项目"鲟鱼无公害生产关键技术研究与示范"(2007BAD37B05-04)
关键词
杂交鲟
循环水养殖系统
放养密度
特定生长率
成活率
hybrid sturgeon
reeirculating aquaculture system
breeding density
specific growth rate
survival rate
