| 摘要: |
| 为探索北方人工繁育花鲈(Lateolabrax maculatus)幼鱼冬季生长最佳温度及投饵模式, 本实验首次采用温度和限食双因素处理来研究花鲈幼鱼的补偿生长规律。实验设置3个温度水平(20℃、16℃和12℃)和2个投喂水平(100%投喂和50%投喂), 其中A组(20℃和100%投喂)为对照组,B组(16℃和100%投喂)、C组(12℃和100%投喂)、D组(20℃和50%投喂)、E组(16℃和50%投喂)和F组(12℃和50%投喂)为处理组。实验分2个阶段: 第一阶段为30d的处理阶段; 第二阶段为20d的恢复阶段。结果表明, 花鲈幼鱼在不同温度及限食条件下具有不同的补偿生长能力和补偿生长机制。B组通过提高饵料转化率实现了超补偿生长; C组也是通过提高饵料转化率达到了完全补偿生长; D、E组则通过提高摄食率实现了完全补偿生长; F组的花鲈幼鱼则通过提高饵料转化率实现了部分的补偿生长。综合考虑花鲈幼鱼冬季培育成本及其生长, 建议北方花鲈幼鱼越冬培育温度为16℃, 投喂模式为100%投喂。 |
| 关键词: 花鲈(Lateolabrax maculatus)幼鱼 温度 限食 摄食 补偿生长 |
| DOI：10.11759/hykx20160811001 |
| 分类号: |
| 基金项目:国家“十二五”国家科技支撑计划课题(2011BAD13B03); 东营市渔业科技资助项目(20150217) |
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| Temperature and food restriction effect on ingestion and growth in early-stage Lateolabrax maculatus juveniles |
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WANG Wei,ZHANG Kai-qiang,WEN Hai-shen,ZHANG Mei-zhao,LI Ji-fang
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| Abstract: |
| This study aims to find the optimum growth temperature and feeding mode for the artificial breeding of Lateolabrax maculatus juveniles in the northern region during winter. This is the first instance in which different temperature and food restriction treatments were used to study the compensatory growth regularities of L. maculatus juveniles. We set up three levels of temperature ure (20, 16, 12℃) and two levels of food restriction (50% and 100%). Group A (20℃ and 100%) was the control group; B (16℃ and 100%), C (12℃ and 100%), D (20℃ and 50%), E (16℃ and 50%), and F (12℃ and 50%) were the treatment groups. The experiment was divided into two phases in which phase 1 comprised treatment for the duration of 30 days and phase 2 comprised recovery for the duration of 20 days. The results showed that after different temperature and food restriction treatments, L. maculatus juveniles obtained different degrees of compensatory growth ability and compensatory growth mechanism. Group B achieved over-compensatory growth by improving food conversion efficiency. Group C achieved full compensatory growth by also increasing food conversion efficiency. Both groups D and E achieved full compensation growth by increasing the feeding ratio. In addition, the results showed that the L. maculatus juveniles of group F achieved compensation growth by increasing food conversion efficiency. Considering the cultivation cost and growth of L. maculatus juveniles, it is suggested that the culturing optimum temperature of L. maculatus juveniles in the northern region is 16℃, and that the feeding mode is satiation. |
| Key words: Lateolabrax maculatus juveniles temperature food restriction ingestion compensatory growth |
