Effects of Photoperiod and Different Artificial Light Colors on Nile Tilapia Growth Rate
Effects of Photoperiod and Different Artificial Light Colors on Nile Tilapia Growth Rate
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DOI：
10.9790/2380-0330512
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
A. M. Elsbaay
中科院分区：
文献类型：
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作者：
A. M. Elsbaay
Theobjectivesofthepresentstudyweretoexaminetheeffectsofphotoperiodandlight colors on growth rate and activity of Nil Tilapia (Tilapia Niloticus).The fish were fed by hand a commercial feed (crude protein, 27%; crudelipid 5.06 %; crude fiber 5.08 %; total energy 4000 kcal/kg) for 60 days.The results indicated that photoperiod (24L:0D, 16L:8D and control) and light colors (white, red and blue) were significantly affected fish growth performance. The blue light was better than other colors lights, both at different photoperiods. The blue light and long light phase (24 light hours) produced the best fish percentage weight gain (WG = 1037.8 %), specific growth rate (SGR = 4.05 %), daily growth rate (DGR = 17.3 %) and growth efficiency (GE = 0.29). On the other hand, the blue light and light cycle 16L:8D gave weight gain (WG = 890.4 %), specific growth rate (SGR = 3.82 %), daily growth rate (DGR = 14.84 %) and growth efficiency (GE = 0.27). The lowest mean values of feed conversation ratio (FCR = 1.04) was observed in blue light and long light photoperiod. The highest mean values of feed conversation ratio (FCR = 1.19) was observed in blue light and 16L:8D light cycle.
