Processing yield of Nile tilapia (Oreochromis niloticus Linnaeus, 1757) and pacu (Piaractus mesopotamicus Holmberg, 1887) - DOI: 10.4025/actascianimsci.v25i1.2068

• Autor(a) principal: Faria, Regina Helena Sant'Ana de
• Data de Publicação: 2008
• Outros Autores: Souza, Maria Luiza Rodrigues de, Wagner, Petra Maria, Povh, Jayme Aparecido, Ribeiro, Ricardo Pereira
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Animal Sciences (Online)
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/2068
• topic: Oreochromis niloticus; Piaractus mesopotamicus; filetagem; rendimento do processamento; filé de peixe; 5.04.00.00-2 Zootecnia

It has been analysed the processing yield of Oreochromis niloticus and Piaractus mesopotamicus. A total of 20 individuals from each species, presenting a mean weight of 816,0 &plusmn; 74,0g and 1958,0 &plusmn; 164,0g, and total length of 33.6 &plusmn; 1,1cm and 42.4 &plusmn; 1,2cm, respectively, for tilapia and pacu. They were killed with thermical shock, weighed, measured, then extracted internal organs and fillets. The fillet yield was higher in pacu (p < 0,01) than those observed in tilapia. These values for pacu were superior (p < 0.01) to tilapia’s. These values were 51.60% for fillet with skin and 46.73% without skin, while for tilapia they were 39.21% and 36.44%, respectively. There were no significant difference for the yield on the visceral carcass and skin between the two species. The percentage for the tilapia’s head (28.34%) was significantly superior (p < 0.01) to pacu’s (16.57%). Individuals with big and long head promoted low fillet yield, as verified for tilapia, and those with small head as pacu, the yield ranges higher values, evidencing the existence of a inverse relationship between the size of the head and fillet yield.