Water quality of the closed recirculating water systems for marine shrimp larvicultures
1986
Sompop Rungsupa
Water Quality in two types of water systems used for marine shrimp maturation process and larviculture was studied. These two types of water systems were closed recircultaing water system and the open systems. The results showed different water quality in the two systems used for P. monodon maturation process. The concentration of nitrite and nitrate in the closed recirculating water system were a little higher than the open system. Nevertheless, these levels of nitrite and nitrate were still within the acceptable limit. The spawning frequency of shrimps in the closed recirculating water system, was lower than that of the open system, but the amount of feritlized eggs from the two systems were comparable. Spawners from the nature performed more spawning frequency than the pond reared spawners. As regards the Penaeus merguiensis larviculting, it was found that, water quality in the closed recirculating water system was better than that in the open system. Nevertheless, the percent survival of shrimps in the colsed systems was lower than that in the open system.
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