| 段国庆，江 河，胡 王，等.投喂水平对黄鳝幼鱼生长的影响[J].广东农业科学,2015,42(7):-109 |
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投喂水平对黄鳝幼鱼生长的影响 |
| Effects of feeding level on growth performance of Monopterus albus larvae |
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| DOI： |
| 中文关键词: ：黄鳝 投喂水平 仔稚鱼 生长 |
| 英文关键词: Monopterus albus feeding level larvae growth performance |
| 基金项目: |
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| 中文摘要: |
| ：在水温为 25~28℃的条件下，研究不同投喂水平对不同日龄阶段的黄鳝仔稚鱼生长、存活的影响。
一期（7~15日龄）5个投喂水平分别为…20、40、60、80、100%IBW/d（IBW为初始体重）；二期（16~24日龄）5个投
喂水平分别为20、35、50、65、80%IBW/d；三期（25~33日龄）5 个投喂水平分别为20、30、40、50、60%IBW/d。
结果表明：（1）投喂水平显著影响黄鳝仔稚鱼的生长。7~15日龄（一期）幼鱼的特定生长率（SGR）随投喂水平的
增加显著上升，以100%IBW/d 投喂组最高；16~24日龄阶段（二期）幼鱼的SGR 与前一阶段的变化趋势相同，以
80%IBW/d 投喂组最高；而25~33日龄（三期）时，SGR以20%IBW/d 投喂组最低，其他各组无显著差异。（2）投喂
水平显著影响黄鳝鱼体相对增重率（WGR）和SGR，投喂水平与WGR和SGR 呈正相关性，除最低投喂组外，其
余组别的投喂水平与饲料转化率（FCE）呈负相关。（3）各期仔鱼鱼体产出与饲料投入之比随着投喂水平升高差异
显著。7~15日龄（一期）阶段鱼体产出与饲料投入比总体上呈降低的趋势，以40%IBW/d 处理组最高；16~24日龄
（二期）时各处理组差异不显著；25~33日龄（三期）时鱼体产出与饲料投入比也是呈现降低的趋势，以30%IBW/d
处理组最高。 |
| 英文摘要: |
| This study was carried out to investigate different feeding levels on the growth，body composition， coefficient of variation of body wet weight and body length of Monopterus albus larvae with 7-15 dph，16-24 dph and 35-33 dph，and to determine the optimal feeding level in the commercial larviculture operations. Five feeding levels of 20，40，60，80 and 100% IBW（initial body weight）/d for 7-15 dph larvae，20，35，50，65 and 80% IBW/d for 16-24 dph larvae，and 20，30，40，50 and 60% IBW/d for 25-33 dph larvae were adopted，respectively. The results showed that feeding level had significant effect on growth performance，feeding level increased，specific growth rate（SGR）increased，and reached the highest level at the 100% IBW/d group. For 16-24 dph larvae，SGR had the same trend as the larvae of 7-15 dph，and reached the highest level at the 80% IBW/d group. For 25-33 dph larvae，SGR reached the lowest level at the 20% IBW/d group，and there was no significant difference in other groups. Feeding level significantly effected weight gain rate（WGR）and SGR，and had positive correlation with WGR and SGR. Except for the lowest feeding level group，the rest feeding levels had negative correlation with feed conversion efficiency（FCE）. The ratio of output and input feed of fish generally decreased for 7-15 dph larvae，the optimal level was 40%IBW/d. For 16-24 dph larvae，there was no great difference in all groups. For 25-33 dph larvae，ratio of output and input feed of fish decreased，the optimal feeding level was 30%IBW/d. |
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