Effects of Stocking Density, Hiding Material and Photoperiod Manipulation on Growth and Survival Rate of Marble Goby (Oxyeleotris marmorata Bleeker, 1852) Juveniles
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Abstract
The optimal culture conditions (stocking density, hiding material and photoperiod manipulation) for marble goby were investigated separately. In the first experiment, marble goby juvenile (2.42±0.17 cm in length) at different stocking densities (50, 250 and 500 fish/m2) were released in small cages (0.50x0.50x0.50 m3) floating in 50 tons concrete indoor-tank. For the second experiment on effect of hiding material, 250 fish/m2 marble goby juveniles were reared with or without a piece of car corrugated pipe in the fish cage. Finally, for the experiment on photoperiod manipulation, 250 fish/m2 marble goby juveniles were reared in plastic tanks (0.40 x 0.50 x 0.30 m3), each of which were exposed to different photoperiod arrangements (natural photoperiod or NP, 0D/24L, 6D/18L, 12D/12L, 18D/6L, 24D/0L and 6D/6L/6D/6L). Fish were fed with live feed and all experiments in triplicates were conducted for 60 days. Upon termination, growth performance of fish was evaluated. The highest growth performance and survival rate of fish were achieved with fish reared at 250fish/m2 with hiding materials and at 6D/6L/6D/6L photoperiod manipulation.
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References
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