Apparent digestibility of corn, corn-starch, extruded corn, corn-germ, sorghum, wheat middlings, rice meal, corn gluten meal, gluten 60, soybean meal, canola meal, cottonseed meal, fish meal, meat and bone meal, poultry by-product meal, blood meal and poultry feathers hydrolyzed meal were determined for Nile tilapia juveniles (100±10 g) fed purified diet and 0.10% chromic oxide. Fish were maintained in 5 aquaria (250 L) at a density of 20 fish/aquarium for feeding, between 8a.m. and 5:30 p.m. After this period, they […]

The aim of the work was to determine the digestible protein requirement (PD) for Nile tilapia in the sexual reversion phase, where 1250 larvae were assigned to 25 aquariums (60 L), with five treatments and five replicates in a completly randomized design. The larvae were fed ad libitum, five times a day, with isoenergy, isocalcium, isophophorus rations, with 30, 34, 38, 42 and 46% of PD, and 30 mg/kg of a-metil hormone testosterone. The animals of each experimental unit were […]

Performance, carcass characteristics and coefficients of apparent digestibility of Nile tilapia fingerlings (Oreochromis niloticus) fed diets with increasing levels of poultry by-product meal (PM) were evaluated. Three hundred fingerlings with average initial weight of 0.35±0.01 g were placed in thirty 120 L net ponds in five cement 1000 L tanks. Six levels of PM inclusion (0.00, 4.00, 8.00, 12.00, 16.00 and 20.00%) were used in the diets, in an experimental randomized blocks desing with six treatments and three replicates. An […]

Aiming to evaluate different inclusion levels of cassava meal (0.00, 6.00, 12.00, 18.00 and 24.00%) in diets with 30.00% of digestible protein and 3,000 kcal/kg of digestible energy to Nile tilapia fingerlings, an experiment was carried out at the Aquaculture Laboratory /DBI/UEM. Two hundred reverted Thai strain Nile tilapia fingerlings were utilized, with an initial weight of 0.84 g and 35 days old, distributed in 25 250L tanks, in a completely randomized design with five treatments and five replications. Averages […]

The trial aimed to evaluate the apparent strain digestibility coefficients (CDa) of dry matter (MS), gross energy (EB) and crude protein (PB) of soybean meal (FS), corn (MO), wheat (TG), wheat meal (FT), millet pearl (MT), triticale (TC), cassava meal (FM) and soybean oil (OS) of Nile tilapia fingerlings of Thai. One hundred sexual reverted animals were used, with a mean weight of 37.61 ± 4.98g, distributed in two alimentation 500L mansory tanks and feces collect in modified Guelph system […]

Aiming to evaluate the effect of increasing levels of fat in the ration on performance, speed of food pass, consummates of ration and corporal fat, it were used 168 Nile tilapia fingerlings, reverted, with average weight of 1.24 ± 0,03g and average size of 4.10 ± 0.30 cm, allotted to 24 aquariums, of 50 L of useful volume, in a completely randomized design with six treatments and four replicates, where the aquarium with seven animals was considered experimental unit, for […]

The experiment aimed to compare the use of 5% of inclusion of fish meal (FP), poultry by-products meal (FV), meat and bones meal (FO) and silkworm meal (FC) and a control (soybean meal and corn) as atractants on feed intake and performance of Nile tilapia fingerlings. One hundred and sixty eight Nile tilapia fingerlings (Thai strain) sexually reversed, with average initial weight of 0.72 ± 0.18 g were assigned to a completely randomized experimental design, with five treatments and five […]

The experiment was carried out to compare the performance of two Nile Tilapia strains (Thai and common) during the initial and growing phases. The fishes (50 in the starting phase and 40 in the growing phase) were assigned to a completely randomized design with two treatments and five replications. Better results were observed for the weight gain percentage, daily weight gain, feed:gain ratio and economic viability in both experimental phases, survival in the starting phase and final size in the […]

This experiment was carried out to evaluate the effect of diets with different crude protein (CP) replacement levels of soybean meal (SBM) by canola meal (CM) on growing Nile tilapia (Oreochromis niloticus) performance and carcass characteristics. Eighty fishes (22.19 ± 0.29 g) were assigned to a block randomized design, with four treatments and five replications. The experimental diets were formulated with 0.00, 33.33, 66.67 and 100.00% levels of SBM protein replacement by the CM protein, corresponding to 0.00, 24.50, 49.00, […]

This study was carried out to determine the apparent digestibility coefficients (ADC) of amino acids for corn, wheat bran, soybean meal and fish meal in Nile tilapia (Oreochromis niloticus), juveniles (25.24 ± 3.88 g), fed purified pelletized reference diet containing 33.78% crude protein and 0.10% of chromic oxide (indicator). The average ADC of amino acids were: 88.31; 77.40; 91.78 and 82.58% for corn, wheat meal, soybean meal and fish meal, respectively. Althought results suggest that the protein ADC value is […]