董桂芳1，胡振雄1，2，黄 峰1，张志平1，胡 鑫1，万祖德1
（1 武汉工业学院动物科学与营养工程学院，动物营养与饲料科学湖北省重点实验室，武汉 430023；
2上海海洋大学省部共建水产种质资源发掘与利用教育部重点实验室，上海 201306）

摘要：通过8周的生长试验，研究斑点叉尾鮰（Ictalurus punctatus）幼鱼（初始体重约4.5 g）的最适投喂频率。试验饲料为自制配合饲料，粗蛋白38%，总能19.0 kJ/g。设计了1~5次/d（M1—M5）5种投喂频率。结果表明：M2、M3、M4组摄食率均显著高于M1和M5组（P<0.05），其中M4组最大。M3、M4、M5组的特定生长率均显著高于M1组（P <0.05），其中M3组最大。M2、M3、M4、M5组的干物质表观消化率均显著高于M1组（P<0.05），M3和M4组的蛋白和能量表观消化率均显著高于M1和M2组（P<0.05）。M3组干物质含量显著高于M1和M2组（P<0.05），M2、M3、M4和M5组的粗蛋白、粗脂肪和能量含量均显著高于M1组（P<0.05）。因此，本研究建议，斑点叉尾鮰幼鱼养殖的最适投喂频率为3次/d。
关键词：投喂频率；饲料利用；鱼体组成；斑点叉尾鮰

Effect of feeding frequency on growth, feed utilization and whole body composition of juvenile channel catfish (Ictalurus punctatus)
DONG Gui-fang1, HU Zhen-xiong1,2, HUANG Feng1, ZHANG Zhi-ping1, HU Xin1, WAN Zu-de1
( 1 Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan 430023, China; 2 Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China )

Abstract: An 8-week growth trial was conducted to investigate the optimal feeding frequency for juvenile channel catfish (Ictalurus punctatus). One experimental diet (38% crude protein, 19.0 kJ/g gross energy) was formulated for the fish. Five feeding frequencies were tested: 1 meal/d (M1), 2 meals/d (M2), 3 meals/d (M3), 4 meals/d (M4) and 5 meals/d (M5). The growth, feed utilization and whole body composition of the fish were investigated after this period. The results show that feeding rates of fish fed at M2-M4 were significantly higher than those of fish fed at M1 and M5 (P<0.05), and the fish fed at M4 obtained the highest value. Fish fed at M3-M5 showed significantly higher specific growth rate than that in fish fed at M1 (P<0.05), and the fish fed at M3 obtained the highest value. The ADCd of fish fed at M2-M5 were significantly higher than that of fish fed at M1 (P<0.05), ADCp and ADCe of fish fed at M3 and M4 were significantly higher than those of fish fed at M1 and M2 (P<0.05). Fish fed at M3 showed significantly higher dry matter content than those in fish fed at M1 and M2 (P<0.05), while fish fed at M2-M5 showed significantly higher crude protein, crude lipid and energy contents than those in fish fed at M1 (P<0.05). Results of the present study suggest that the optimal feeding frequency was 3 meals/d in the culture of juvenile channel catfish.
Keywords: feed utilization; whole body composition; Ictalurus punctatus

基金项目：湖北省教育厅中青年项目（Q20101710）；武汉工业学院校立项目（2009Q02）；武汉工业学院2011年大学生创新项目
作者简介：董桂芳(1980—)，女，讲师，博士，主要从事水生动物营养与饲料研究。E-mail: dongguifang2002@yahoo.com.cn.

（来源：《渔业现代化》2012,39(2):48-53）