Larval survival and growth in Wallago attu (Bloch and Schneider): effects of light, photoperiod and feeding regimes
Larval survival and growth in Wallago attu (Bloch and Schneider): effects of light, photoperiod and feeding regimes
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DOI：
10.1016/s0044-8486(02)00012-1
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发表时间：
2002-10
期刊：
影响因子：
4.5
通讯作者：
S. S. Giri-S.;S. K. Sahoo;B.B Sahu;A. K. Sahu;S. Mohanty;P.K Mukhopadhyay;S. Ayyappan
中科院分区：
文献类型：
--
作者：
S. S. Giri-S.;S. K. Sahoo;B.B Sahu;A. K. Sahu;S. Mohanty;P.K Mukhopadhyay;S. Ayyappan
在室内进行了为期11天的室内饲养研究，以单独的活浮游动物（对照）或浮游动物与含有鱼粉、肉粉或虾粉的干饲料（F1）的组合（F2），在24 h连续光照（24 L）、12 h光照-12 h黑暗（12 L：12 D）、24 h红光（24 RL）和完全黑暗（0 L）下饲养Wallago attu幼虫。不同光照条件下幼虫存活率差异显著（P<0.05），以24 RL最高，其次为24 L、12 L：12 D和0 L。以活饲料和干饲料混合喂养的鱼比仅以浮游动物喂养的鱼生长得快得多。在不同的光照和光周期条件下，单独投喂活的浮游动物对鱼类的生长没有显著影响。浮游动物与干饲料配合投喂组的比生长率显著高于单独投喂组（P<0.05）。试验结束时，红光组幼虫的总生物量最高（P<0.05），0 L组最低。永久黑暗降低了存活率和抑制总生物量生产。阿杜幼虫与12 L：12 D或0 L方案相比，红光和连续光促进更高的存活率和生物量生产。在室内饲养条件下，红光照射24 h可获得最高的成活率和最大的生物量。阿杜幼虫
An in-door rearing study was conducted for 11 days with Wallago attu larvae fed on live zooplankton alone (control) or combinations of zooplankton and dry feed containing either fish meal (F1), meat meal (F2) or shrimp meal (F3) under 24 h continuous light (24L), 12 h light–12 h dark (12L:12D), 24 h red light (24RL) or complete darkness (0L). The percent survival of larvae was significantly different (P<0.05) among the larvae reared under various light regimes with highest in 24RL, followed by 24L, 12L:12D and 0L, in descending order. Fish fed on combination of live plus dry feeds grew significantly faster than those fed on zooplankton alone. There was no significant difference in growth of fish reared under different light and photoperiod regimes when fed on live zooplankton alone. The specific growth rate (SGR) was significantly greater (P<0.05) in fish fed on the combination of zooplankton and dry feeds as compared to zooplankton alone. At the end of the experiment, total biomass production was the highest (P<0.05) in larvae reared under the red light and lowest in the 0L treatment. Permanent darkness reduced percent survival and suppressed total biomass production of W. attu larvae. Red light and continuous lights promoted higher survival and biomass production as compared to 12L:12D or 0L regimes. For highest survival and maximum biomass production, 24 h red light exposure is suggested best during in-door rearing of W. attu larvae.