Taxa de alimentação para juvenis de pirapitinga criados em hapas
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2015-10-19
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Universidade Federal de Goiás
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This study was conducted in order to evaluate the effect of different feeding rates on growth performance, economic evaluation, morphometric characteristics and blood biochemistry of pirapitinga (Piaractusbrachypomus) in ponds during rearing. The experiment was conducted in the Fish Farming Sector of the Department of Animal Science School of Veterinary and Animal Science at UFG in the period from February to April, for 60 days. It was used 100 juveniles pirapitinga with an average weight of 328.81 ± 25.55 grams, randomly assigned in 20 hapas of 1 m³ installed in excavated tank of 200 m² in density of 05 juveniles / m³. The experimental design was randomized blocks, with five treatments, T1 0.7% of biomass; T2 1.4% of biomass; T3 2.1% of biomass; T4-2,8% of biomass; T5- 3.5% of biomass; with four replications, totaling 20 experimental units. Fish were fed with commercial feed containing 32% CP and grain size of 2-4 mm, twice a day, at 9 am and at 5 pm. The supply of feed was based on the percentage of biomass, so it was done a biometrics fortnightly from start to end of the experiment. The variables of productive performance were analyzed; economic evaluation; chemical composition of the carcass; blood chemistry ehistomorfometria gut: villi height. Data were subjected to analysis of polynomial regression and variance, and, in case of statistical differences, the average comparison test SNK (5%). The final individual weight and weight gain, showed a quadratic relation, in function of the increasing feed levels and their maximum points were checked feed rates de2,77% and 2.78% biomass per day, respectively. It was concluded that the feeding rate of 2.1% biomass per day resulted in a better performance and economic result and shorter ether extract to pirapitinga created during rearing in excavated tank.
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ZARPELLON, I. Taxa de alimentação para juvenis de pirapitinga criados em hapas. 2015. 61 f. Dissertação (Mestrado em Zootecnia) - Universidade Federal de Goiás, Goiânia, 2015.