Arquivo Brasileiro de Medicina Veterinária e Zootecnia
On-line version ISSN 1678-4162
LAZZARI, R. et al. Performance and fillet composition of jundiá (Rhamdia quelen) submitted to different diets in the rearing. Arq. Bras. Med. Vet. Zootec. [online]. 2008, vol.60, n.2, pp.477-484. ISSN 1678-4162. http://dx.doi.org/10.1590/S0102-09352008000200030.
The growth and fillet composition of jundiá juveniles after 90 days being fed with diets containing different protein sources were evaluated. Five hundred and forty fish (initial weight: 15.00±0.62g; initial length: 11.98±0.35cm) were randomly distributed in 18 tanks (30 fish/tank), in a water re-use system. Six diets were tested: 1- meat and bone meal + yeast (CL), 2- soybean meal + yeast (SL), 3- soybean meal (S), 4- meat and bone meal + soybean meal (CS), 5- fish meal + yeast (PL,) and 6- fish meal + soybean meal (PS). The following parameters were evaluated: weight, total length, specific growth rate, condition factor, survival, feed conversion ratio, protein efficiency ratio, and daily consumption. Fillet composition (moisture, protein, lipid, and ash), protein and lipid depositions ratios, carcass and fillet yields were also determined. The highest values of weight (111.5 and 108.6g), total length (22.6 and 21.6cm), and specific growth rate (2.1 and 2.2%/day), were observed in fish fed CS and PS diets. Fish fed CS and PS diets also showed the highest protein (69.8 and 71.5mg/day), and lipid depositions (77.2 and 78.3mg/day). Survival was smaller in fish fed diet PS (92.86%). The highest values of carcass yield were observed in fish fed PL and PS diets (82.9 and 82.7%), and the lower fillet yield was observed in CL diet (34.1%).
Keywords : fish; jundiá; protein source; fillet composition; growth.