Regulation of voluntary protein/energy intake based practical diet composition for the carnivorous neotropical catfish Lophiosilurus alexandri
| Autor: | Fabio A. C. Santos, Pedro G. Gamarano, Camila Gomes de Oliveira, Helder O. Guilherme, Leandro Santos Costa, Welliene Moreira dos Santos, Ronald Kennedy Luz, Paula Adriane Perez Ribeiro, Rodrigo Fortes-Silva |
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| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
Protein x Diet composition Lophiosilurus alexandri 04 agricultural and veterinary sciences Aquatic Science Biology biology.organism_classification 03 medical and health sciences Animal science 040102 fisheries Tukey's range test 0401 agriculture forestry and fisheries Fish 030304 developmental biology Catfish |
| Zdroj: | Aquaculture. 510:198-205 |
| ISSN: | 0044-8486 |
| Popis: | The effect of different energy to protein ratios on voluntary feed intake was investigated in the carnivorous catfish Lophiosilurus alexandri, in order to evaluate their feeding behaviour responses. Two trials were performed. The first trial involved 16 fish distributed among 16 tanks, which were allowed to select one of two experimental encapsulated diets (24% vs 42% of crude protein or Energy (MJ g−1): Protein (g) ratio of 0.068 × 0.041). The objective was to isolate sensorial influence on the choice of diet. For the second trial, six experimental groups were designed with successive increases in protein and successive decreases in energy to evaluate diet selection by the self-feeding method: Group 1 – 24% of crude protein x 30% of crude protein; G2 – 24% x 36%; G3 – 24% x 42%; G4 – 30% x 36%; G5 – 30% x 42%; and G6 – 36% x 42%. These groups had the following energy to protein ratios (E:P MJ g−1 protein): G1 – 0.068 x 0.057; G2 – 0.068 x 0.048; G3 – 0.068 x 0.041; G4 – 0.057 x 0.048; G5 – 0.057 x 0.041; and G6 – 0.048 x 0.041. Diet selection data were arcsin (√) transformed and then subjected to the Student t-test. Mean protein (g/kg of BW), energy:protein (MJ energy/g crude protein/kg BW) and energy (MJ energy/kg BW) consumption were submitted to ANOVA and Tukey test (P |
| Databáze: | OpenAIRE |
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