唇池塘苗种培育试验

Fry and Juvenile Rearing of Hemibarbus labeo in an Earthen Pond

进行了唇夏花培育、1龄秋片苗种培育和2龄秋片苗种培育生产性试验。夏花培育池0.67hm2,轮虫高峰期下塘唇水花鱼苗10万尾。经24d培育,鱼苗的平均全长达34.92mm,增长4.04倍,平均体质量达0.285g,增长142.5倍,鱼苗在22日龄后体质量增长较快,出塘唇夏花8.2万尾,成活率82%。1龄秋片苗种培育试验池塘面积0.27hm2,放养夏花8万尾(平均全长2.58cm),经142d培育,平均全长达16.62cm,增长6.44倍,平均体质量达37.88g,增长291.38倍,出塘秋片鱼种6.248万尾,成活率78.1%,饵料系数2.5。2龄苗种培育池塘0.2hm2,放养1万尾(平均体质量15.6g),经101d饲养,平均全长达18.21cm,增长1.56倍,平均体质量达56.66g,增长3.63倍,出塘唇鱼种9960尾,成活率99.6%,饵料系数2.2。

The fry and juveniles of Hemibarbus labeo were experimentally reared in an earthen pond to optimize the fish culture techniques. A total of 100 thousand frY were reared in a 0.67 hm^2 pond where there was high density of rotifer for 24 days, and 82 thousand summerlings with body length of 34.92 mm and body weight of 0. 285 g were obtained, with 4.04 times in body length gain and 142.5 times in body weight gain, especially 22 days afterwards. About 80 thousandautumnlings with body length of 2.58 cm were cultured in a 0.27 hm^2 pond for 142 days, when the juveniles had average body length of 16.62 cm, increased by 6.44 times and the average body weight of 37.88 g, increased by 291.38 times, and 62.48 thousand juveniles were harvested, with survival rate of 78. 1%, and food conversion ratio of 2.5. Ten thousand yearlings with body weight of 15.6 g were reared in a 0.2 hm^2 pond for 101 days, and then 9960 juveniles （2 year old）with body length of 18.21 cm and body weight of 56.66 g were obtained, with 1.56 times in body length gain, and 3. 63 times in body weight gain, with survival rate of 99.6%, and food conversion ratio of 2.2. The findings suggest that the fry and juvenile of Hemibarbus labeo be cultured in the earthen ponds.