This study was carried out to evaluate the influence of different levels of digestible energy and digestible protein in diets of Nile tilapia (Oreochromis niloticus) broodstock on offspring growth during sex reversal stage. A total of 2,700 post-larvae (8.2±0.001 mg) derived from breeders fed nine diets with distinct levels of digestible protein (28, 34 and 40% DP) and digestible energy (2,800; 3,400; and 4,000 kcal DE.kg-1) were stored in twenty-seven 70 L tanks. After 30 days of growth, their average […]

A 29-d experiment was carried out to evaluate the Saccharomyces cerevisiae (SC) as probiotic in diets for Nile tilapia (Oreochromis niloticus) during the sexual reversion phase, under a sanitary challenge. Three hundred 2-d larvae averaging 8.9 ± 1.02 mg and 0.71 ± 0.09 cm were allotted to a completely randomized design with two treatments and six replicates in twelve 50 L-aquaria. Sanitary challenge consisted of a daily supply of 0.5 mL of fresh swine manure. Treatments consisted of a commercial […]

This work aimed to evaluate the effect of protein source origin and lysine and methionine or phosphorus and calcium supplementation to Nile tilapia during sex reversal phase. Two hundred fries were assigned to a completely randomized design with four treatments and five replications, in twenty 12 L aquarium. One aquarium with 10 Nile tilapia fry was considered an experimental unit. Morning and afternoon temperatures, dissolved oxygen, pH and electric conductivity was 22.6 ± 0.1ºC, 24.1± 0.4ºC; 6.77 ± 0.38 mg/L, […]

This work was carried out at Aquicultura Laboratory of Maringá State University, to evaluate the different processing form of diets on Nile tilapia fry performance and survive, during sexual revert phase. Was utilized 540 fry distributed, on completely randomized design with three treatments and six replications, in eighteen 54 L aquarium and one aquarium with 30 Nile tilapia fry was considered an experimental unit. The experimental period was 28 days with average temperatures of 21.9 ± 0.1ºC in the morning […]

ABSTRACT – The objective of this work was to evaluate the effects of the replacement of the protein from soybean meal (SM) by protein from canola meal (CM) in diets for piavuçu fry (Leporinus macrocephalus). Two hundred and eighty-eight fry with initial 0.17±.03 g LW and length of 2.95±.19 cm were allotted to 24 aquarium, (50-L) with 12 fish in each one. A completely randomized design with six treatments (0, 20.0, 40.0, 60.0, 80.0, and 100.0%), which corresponded to 0.0, […]