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延迟投饵对卵形鲳鲮早期仔鱼阶段摄食、成活及生长的影响
引用本文:许晓娟,区又君,李加儿.延迟投饵对卵形鲳鲮早期仔鱼阶段摄食、成活及生长的影响[J].南方水产,2010,6(1):37-41.
作者姓名:许晓娟  区又君  李加儿
作者单位:1. 中国水产科学研究院南海水产研究所,广东,广州,510300;上海海洋大学水产与生命学院,上海,201306
2. 中国水产科学研究院南海水产研究所,广东,广州,510300
基金项目:中央级公益性科研院所基本科研业务费专项资金(中国水产科学研究院南海水产研究所)资助项目(2008YD02)
摘    要:利用人工繁殖产生的卵形鲳够(Trachinotus ovatus)初孵仔鱼,在水温(26.8±1.4)℃、盐度28.2±0.8条件下,对延迟投饵0~6d的卵形鲳够仔鱼的摄食、生长及其成活情况进行了研究。结果显示,仔鱼于3Et龄开口,于开口的当天投饵及延迟投饵1、2、3、4和5d,投饵后2h内仔鱼的摄食率分别为15%、30%、50%、25%、15%和5%,每尾鱼的平均摄食量分别为0.4、0.6、1.3、0.6、0.3和0.1个轮虫。延迟投饵6d一组仔鱼的摄食率均为0。延迟投饵0、1和2d各组仔鱼的成活率相差不大,但延迟3d以上仔鱼的成活率急剧下降。卵形鲳鲣仔鱼的初次摄食饥饿不可逆点(PNR)出现在仔鱼开口后4d,开始投喂饵料的最佳时期应在仔鱼开口后的3d之内。

关 键 词:卵形鲳鲮  仔鱼  延迟投饵  摄食  成活  生长

Effects of delayed feeding on foraging,survival and growth of ovate pompano(Trachinotus ovatus)larvae during early developmental stage
XU Xiaojuan,OU Youjun,LI Jiaer.Effects of delayed feeding on foraging,survival and growth of ovate pompano(Trachinotus ovatus)larvae during early developmental stage[J].South China Fisheries Science,2010,6(1):37-41.
Authors:XU Xiaojuan  OU Youjun  LI Jiaer
Institution:1. South China Sea Fisheries Research Institute/a>;Chinese Academy of Fishery Sciences/a>;Guangzhou 510300/a>;China/a>;2. College of Fisheries and Life/a>;Shanghai Ocean University/a>;Shanghai 201306/a>;China
Abstract:Effects of delayed initial feeding on the foraging, growth and survival of artificial bred larvae of ovate pompano ( Trachinotus ovatus) were studied under the water temperature of (26. 8 ± 1.4) ℃ and salinity of 28. 2 ± 0. 8. The results showed that the larval mouth opened 3 days after hatching, and with the delayed initial feeding of 0, 1, 2, 3, 4 and 5 days, the feeding rate was 15%, 30% , 50% , 25%, 15% and 5% , respectively; the average consumption per larva within two hours was 0. 4, 0. 6, 1.3,0. 6, 0. 3 and 0. 1 prey, respectively. At day 6 of the delayed initial feeding, the feeding rate of all larvae was 0 ; there was no significant differ- ence in the survival rate at the delayed initial feeding of day 0, day 1 and day 2 but the survivorship decreased abruptly while the delayed feeding lasted more than 3 days. The point of no return (PNR) occurred at 4 days after the larval mouth opened, which indicated that the optimum initial feeding time for the larvae was within 3 days after their mouths opened.
Keywords:ovate pompano ( Trachinotus ovatus)  larvae  delayed feeding  foraging  survival  growth
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