Trout Culture and its Density Increment in Culture Unit Applying Effluent Water in Invitro Condition
Subject Areas : New Technologies in Aquaculture Development
Keywords: Rainbow trout, effluent, Keywords: Density, Water velocity,
Abstract :
During a project, carried out within 35 days, the effect of water flow increment on rainbow trout culture was surveyed by reusing the outlet effluent under a Complete Random Design with 4 treatments and 3 repeats. The factors studied were Weight, Length, Specific Growth Rate (SGR), Daily Growth Rate (DGR), Condition Factor (CF) and the Survival Rate (SR) in culture fishes. Fry initial weight and body length were 5.5 gr and 6.7 cm respectively. The treatments consisted of various water velocities including 0, 3.5, 7 and 10.5 cm/s. The results of variance analysis of surveyed fry factors showed very significant differences among all treatments during the first week (p < 0.01). However, these results were not observed in other weeks. On the other hand, the results of data variance Analysis of the factors through all 35 days period experiment showed significant differences among all treatments regarding all the fry factors except for Length and Condition factor. The results of Duncan’s test of surveyed factors among a 35 days period showed that the best average Weight (24gr), SGR (6%), Daily growth rate (1) and Survival Rate (97%) were achieved in 10 cm/s treatment but about fry Length factor, all treatments were equal.
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