EFFECTS OF STOCKING DENSITY ON WATER QUALITY IN THAMBAQUI (Colossoma macropomum, CUVIER, 1818) RAISING DURING SECOND FINGERLING PERIOD IN FERTILIZED PONDS
DOI:
https://doi.org/10.5216/cab.v8i4.2691Keywords:
Piscicultura, tanques-redeAbstract
In order to analize the effect of three stocking den-sities on the water quality in tambaqui rearing (Colossoma macropomum, CUVIER, 1818) during the fingerling II re-aring in fertilized ponds. 3,120 fingerlings with initial wei-ght of 1.41 ± 0.49 g were stocked in three densities: 33, 43 and 53 fingerlings/m². These fingerlings were fed with a commercial ration, three times on day, ad libitum. The following parameters were analyzed: dissolved oxygen, total alkalinity, non-ionized ammonia and nitrite, using a chemical kit to water analyze and Secchi´s Disk to transparency. The data were analyzed in completely randomized desing in factorial diagram 3x5, with three stocking densities and five analyses. The hidrological variables studied stayied according with the standard of a good development of tambaqui in fertilized ponds, with exception of oxygen, that sowed values lower than literature regards, but this values didn’t damage the fish development.
Key-words: Fingerling, hidrological variables, intensive system.
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