CAJ | 학술논문

　　选取同一种进口鳟鱼标准饲料,设1.0%、2.0%、3.0%、4.0%和5.0%共5个投喂率水平,在溶解氧为8.0-8.5mg/L、水温为(16±0.5)℃的流水条件下,对初始体重为5.32-6.43g 的细鳞鲑幼鱼进行为期35d的生长实验。结果表明,随着投喂率的增加,相对增重率(WGR)和特定生长率(SGR)先升高后降低,4.0%处理组的这两项指标显著高于其它各处理组(P<0.05),分别为289.82和3.89；饲料转化率(FCE)则呈现逐渐降低趋势,2.0%组的FCE最低,5.0%组最高。随着投饲率的增加,细鳞鲑幼鱼鱼体水分含量呈下降趋势；灰分含量无规律性变化；粗蛋白含量保持在相近水平(除1.0%处理组)；粗脂肪含量无规律性变化,但3.0%组显著高于其它各处理组,4.0%组鱼体粗脂肪含量最低。综合衡量WGR、SGR和FCE等指标,认为细鳞鲑幼鱼(5-25g体重)在密度为300尾/m3、水温为(16±0.5)℃流水条件下,最适宜的投饲率为3.0%-4.0%。
　　선취동일충진구준어표준사료,설1.0%、2.0%、3.0%、4.0%화5.0%공5개투위솔수평,재용해양위8.0-8.5mg/L、수온위(16±0.5)℃적류수조건하,대초시체중위5.32-6.43g 적세린해유어진행위기35d적생장실험。결과표명,수착투위솔적증가,상대증중솔(WGR)화특정생장솔(SGR)선승고후강저,4.0%처리조적저량항지표현저고우기타각처리조(P<0.05),분별위289.82화3.89；사료전화솔(FCE)칙정현축점강저추세,2.0%조적FCE최저,5.0%조최고。수착투사솔적증가,세린해유어어체수분함량정하강추세；회분함량무규률성변화；조단백함량보지재상근수평(제1.0%처리조)；조지방함량무규률성변화,단3.0%조현저고우기타각처리조,4.0%조어체조지방함량최저。종합형량WGR、SGR화FCE등지표,인위세린해유어(5-25g체중)재밀도위300미/m3、수온위(16±0.5)℃류수조건하,최괄의적투사솔위3.0%-4.0%。
A 35-days feeding experiment was conducted to investigate the effect of feeding rate on growth and body composition of Brachymystax lenok (Pallas) juvenile which fed a commercial salmon diet. The body weight of fish was from 5.32g to 6.43g which were fed at 5 different rates of 1.0%, 2.0%, 3.0%, 4.0%and 5.0%body weight/day. The water dissolved oxygen was 8.0-8.5mg/L and the water temperature was (16±0.5)℃. The results indicated that weight gain rate (WGR) and specific growth rate (SGR) firstly increased and then decreased with the increase of feeding rate (FR). The WGR and SGR of 4.0% group were 289.82 and 3.89, respectively, both of them were significantly higher than the other groups (P<0.05). Feed conversion efficiency (FCE) was in a gradually decreasing trend, the lowest one was the 2.0%group and the highest one was the 5.0%group. With the increase of FR, the moisture of fish was decreased, the ash of fish was irregular changed, and the protein of fish keep in similar level except 1.0% group. The fat of fish was also irregularly changed, however the 3.0% group was significantly higher than other groups and the lowest one was the 4.0% group. Based upon the WGR, SGR and FCE data, the optimal FR was 3.0%-4.0%for juvenile B. lenok (5-25g body weight) at the water temperature of (16±0.5)℃ in 300/m3 density.