Comparison of six filleting methods and their relation with fillet yield and by-products of Nile Tilapia (Oreochromis niloticus) processing

[摘要] - Current experiment evaluates six filleting methods for Nile tilapia with regard to fillet yield (FIY), ventral abdominal muscles (AMY), hypaxial muscles (HMY), residues (REY), crude skin (CSY), clean skin (CSY) and fleshed (FEY). Methods consisted of: F1 = filleting of whole fish and skinning of the fillet with knife, (WFS); F2 = skinning of whole fish with pliers and filleting (WSF); F3 = headless fish and filleting; skinning of fillet with knife (HFS); F4 = headless fish, skinning with pliers and filleting (HSF); F5 = headless fish; removal of fins; filleting and skinning with knife (HFFS); F6 = headless fish; removal of fins, skinning with pliers and filleting (HFSF). Twenty tilapias were used for each treatment in a completely randomized design. Filleting method affected all analyzed yield. WSF had the best fillet yield and hypaxial muscle (36.58% and 4.22%, respectively); lowest yield was provided by HFS (33.66% and 3.31%, respectively). With regard to abdominal muscle, HFFS (2.00%) and HFSF (2.02%) were the best. In the case of residues, WSF gave the best result (57.96%); HSF was the best method for clean skin and fleshing (4.14% and 45.52%, respectively), with WSF (4,00% and 46.11%) as next to best result.

[学科分类] 兽医学

[关键词] fillet processing;Oreochromis niloticus;fillet yield;fish technology    Introdução A aqüicultura é uma alternativa para incrementar os índices de consumo de proteínas de origem animal e um importante fator de desenvolvimento socio-econômico para o país