The aim of this study was to determine the effect of a vegetable diet compared to a diet containing fishmeal at the commercial level (6%) on body growth, proximal composition of fillets and hematological parameters of juvenil gamitana (Colossoma macropomum). The experiment followed a completely randomized design with two treatments, an exclusively vegetable diet and a diet with low fishmeal content (6%), and three 200 m3 dug earthen ponds as experimental units per treatment. A total of 1200 fish (172.9 g; 19.4 cm) distributed in the six ponds (1 fish/m3) were used. Feeding was done twice a day (08:00 and 16:00) at a daily feeding rate of 2% for 60 days. The water quality parameters were monitored daily and showed constant values and within the comfort range of the species. The exclusively vegetable diet had a similar effect as the fishmeal diet on body growth [final weight 258.9 g, weigh...

The effect of including fish protein hydrolyzate in the diet on body growth and proximate composition of the muscle of juvenile spotted tiger shovelnose catfish (Pseudoplatystoma punctifer) was evaluated. A completely randomized experimental design with a 2x4 factorial arrangement (2 diets, 4 sampling times [days 15, 30, 45 and 60]) was used, resulting in 8 treatments with 3 replications each. The formulated diets were isocaloric (42.15% CP) and isoproteic (4 415.69 kcal EB kg-1): a control (DT; without supplementation) and another with the inclusion of 1.20% fish protein hydrolyzate (DHP) in substitution of fishmeal. A total of 114 juveniles (642.65 g; 47.93 cm) were distributed in excavated ponds of 200 m2 (19 fish/pond) for 60 days. Every 15 days, eight fish per experimental unit were captured to evaluate body growth (final weight FW, final length FL, weight gain WG, length gain LG, s...