池塘主养食用拉氏试验

Fat Minnow Phoxinus lagowskii Was Cultured in a Pond

为积累拉氏成鱼养殖技术资料,于2013年在辽宁省铁岭县范家屯水库渔场面积为0.53hm2的池塘进行了拉氏主养试验。4月20日放养7.6万尾平均体质量11.2g的拉氏苗种,搭配500尾鲢鱼(平均体质量100g),750尾鳙鱼(平均体质量150g),投喂鲤鱼颗粒饲料,池中配备3.0kW增氧机1台;饲养结果表明,经161d饲养,出塘拉氏商品鱼3350.1kg(平均体质量46.4g),成活率达95%,鲢鱼490kg(平均体质量980g),鳙鱼1050kg(平均体质量1400g),吃食鱼饲料系数为2.1;养殖期间,体质量(m)和全长(L)生长方程分别为:m=-0.0012t2+0.4286 t+10.574(r2=0.6684)、L=0.0006 t2-0.0169 t+11.343(r2=0.6623);体质量与全长的相关方程为m=0.0033L3.4673(r2=0.9117)。

A fat minnow Phoxinus lagowskii culture trail was carried out in a 0.53 hm2 pond in a fish farm in Tieling City, Liaoning province, in 2013. Fat minnow juveniles with initial body weight of 11.2 g was reared at a rate of 143 thousands individuals per hm2 , aerating by a power of a 3.0 kW aerator and by feed- ing formulated feed for common carp （Cyprinus carpio） and polycultured with silver carp Hypophthal- michthys molitrix with initial body weight of 100 g at a rate of 943 individuals per hm2 and bighead carp Aristichthys nobilis with initial body weight of 150 g at a rate of 1415 individuals per hm2 for 161 d. Total yield was harvested, including 3350 kg of fat minnow with body weight of 46.4 g, a survival rate of 95%, and food conversion ratio of 2.1, 490 kg of silver carp with body weight of 980 g and 1050 kg of bighead carp with body weight of 1400 g. The appropriate equation was expressed for body weight （m） as m= --0. 0012t2＋ 0. 4286 t＋10. 574（r2 = 0. 6684） and for total length （L） as L = 0. 0006 t2- 0. 0169 t ＋ 11. 343（r2 = 0. 6623）. The relationship between total length and body weight was described as m = 0. 0033L3.4673 （r2 =0. 9117）.