Alternating Nile tilapia (Oreochromis niloticus) and silver catfish (Rhamdia quelen) farming in recirculation system: A possibility for aquaculture in Southern Brazil / Cultivo alternado de tilápia do Nilo (Oreochromis niloticus) e peixe-gato de prata (Rhamdia quelen) em sistema de recirculação: uma possibilidade para a aquicultura no sul do Brasil

Ramon Grigio, Fábio Meurer


The world aquaculture scenario has undergone several changes due to the deficit in natural fish reserves, which has led to the growth of aquaculture activities to the point of them being considered the leading sector in food production. In Brazil, this activity is increasing rapidly, and the most common commercially cultivated species is the Nile tilapia. Southern Brazil presents a more rigorous winter period than the other Brazilian regions, when aquaculture activities present several unoccupied tanks, generating low productivity and decreases in producer income. In search of an alternative to this problem, the present study aimed to evaluate the alternating production of Nile tilapia (Oreochromis niloticus) and silver catfish or silver catfish (Rhamdia quelen), a native fish that displays adequate growth during the cold period. Fish were divided into two phases, rearing and fattening, and the volume of water used for rearing was 3 times lower than that used for fattening. Tilapia fingerlings were bred in winter months and fattened during summer months, while silver catfish fingerlings were bred in summer months and fattened during winter months. Morphometric and performance parameters were analyzed. The experimental breeding of both Nile tilapia and silver catfish presented promising results. Extrapolating the data obtained herein for the occupation of a productive area close to the ideal, a productivity per species similar to that reached in commercial productions in the region would be obtained. Thus, alternating Nile tilapia and silver catfish farming is a viable alternative for Southern Brazilian aquaculture, as it maintains fish production year round, even during cold periods.




aquaculture, aquatic system, breeding, fish production, jundiá, native fish.

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