Growth curve of pacu and the patinga hybrid farmed in a semi-intensive system

• Autor(a) principal: Seraphim, Guilherme do Nascimento
• Data de Publicação: 2020
• Outros Autores: Corrêa Filho, Ruy Alberto Caetano, Nunes, André Luiz, Pires, Luana Barbosa, Silva, Thiago Gonsalo da, Ferreira, Yasmin Avila, Almeida, Lucas Carvalho de, Martins, Thiago Xavier, Lopera-Barrero, Nelson Mauricio, Spica, Louise Nex, Povh, Jayme Aparecido
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Semina. Ciências Agrárias (Online)
• Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/38241
• topic: Asymptotic value; Gompertz model; Hybrid fish; Piaractus; Specific growth rate.; Valor assintótico; Modelo Gompertz; Peixe híbrido; Piaractus; Taxa de crescimento específico.

The growth curve is a tool that can be used to determine the performance potential of fish at different ages. The aim of this study was to evaluate the growth curve of pacu (P. mesopotamicus) and the patinga hybrid (P. mesopotamicus × P. brachypomus) cultivated in a semi-intensive system. In the initial phase of the experiment, the pacu and patinga fish weighed 32.6 ± 7.5 g and 24.9 ± 7.1 g, respectively. The Gompertz model was adopted to describe the growth curve. At the end of the experiment, body weight, standard length, head length, body height and body width did not differ significantly between the pacu (625.9 g; 25.6 cm; 7.2 cm; 12.1 cm; 4.5 cm) and the patinga hybrid (727.1 g; 27.3 cm; 7.6 cm; 13.2 cm; 4.9 cm). The asymptotic value (parameter A), relative growth rate (parameter B), and age at the inflection point (parameter C) of the growth curve of the two species were similar for weight and for the evaluated morphometric traits. The asymptotic values obtained for weight in the pacu and the patinga hybrid were 1212.0 g and 1348.0 g, respectively. The growth curve of the patinga hybrid is similar to that of pacu, contrasting with the belief of many fish farmers.