Influence of stocking density on water quality and growth performance in production of juvenile pirarucu, Arapaima gigas, in irrigation canals / Influência da densidade de estocagem na qualidade da água e na performance de crescimento na produção de juvenis de pirarucu, Arapaima gigas, em canais de irrigação

• Autor(a) principal: Oliveira, Elenise Gonçalves de
• Data de Publicação: 2020
• Outros Autores: Santos, Francisco José de Seixas, Oliveira, Valdemir Queiroz de, Mesquista, Pedro Eymard Campos, Moraes, Manuella Gazzineo de, Sousa, Rommel Rocha de, Gomes, Igor Gabriel Rodrigues Ferreira, Albuquerque, Leonardo Freitas Galvão de, Rocha, Ítalo Régis Castelo Branco, Costa, Francisco Hiran Farias
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Veras
• Texto Completo: https://ojs.brazilianjournals.com.br/ojs/index.php/BRJD/article/view/7102
• topic: Pirarucu; net pens; stocking density; irrigation canals.

The pirarucu is reared in cages under intensive systems or ponds under semi-intensive systems. This research evaluates the effect of stocking density on water quality, survival and growth of juvenile pirarucu reared in net pens located in irrigation canals. Pirarucu (193.3±37.3 g; 31.5±2.1 cm) were stocked at densities of 3.6, 6 or 10 fish m-3 in 4.2 m3 net pens installed at the Irrigation District of the Coastal Tablelands (DITALPI), Parnaíba (Piauí, Brazil), with three replicate for each density. Fish were fed a formulated diet containing 40% crude protein and 14.2 MJ kg-1 of feed and cultured for 180 days. The physicochemical parameters of the water were at satisfactory levels for fish culture. Survival was 100.0% in all density tested. The final weight, weight gain and and absolute growth rate (AGR) were higher for the medium stocking density (6 fish m-3) than for fish at low stocking density (3.6 fish m-3) and high stocking density (10 fish m-3). Final weight gain, survival, and productivity have demonstrated that the production of pirarucu in net pens using water from irrigation canals can become a viable strategy and a cheaper alternative to increase fish production. In addition, it improves the efficient use of water by integrating two productive activities, agriculture and aquaculture.