Níveis de proteína bruta e lipídios em dietas para juvenis de tambatinga (Colossoma macropomum x Piaractus brachypomus)
| Autor: | WELENGANE, Elias |
|---|---|
| Jazyk: | portugalština |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Biblioteca Digital de Teses e Dissertações da UFRPEUniversidade Federal Rural de PernambucoUFRPE. |
| Druh dokumentu: | masterThesis |
| Popis: | Submitted by Mario BC (mario@bc.ufrpe.br) on 2017-08-08T12:35:49Z No. of bitstreams: 1 Elias Welengane.pdf: 1031704 bytes, checksum: 71a2e70ae309925654accf702410bc2f (MD5) Made available in DSpace on 2017-08-08T12:35:49Z (GMT). No. of bitstreams: 1 Elias Welengane.pdf: 1031704 bytes, checksum: 71a2e70ae309925654accf702410bc2f (MD5) Previous issue date: 2017-02-21 Protein is a high-cost nutrient essential for fish growth and its use as an energy source is undesirable. In this study, crude protein levels (200, 250, 300 and 350 g kg-1) and lipids (110 and 140 g kg-1) were evaluated in diets for tambatinga juveniles (Colossoma macropomum x Piaractus brachypomum) during 63 days. A total of 264 juveniles (15.2 ± 0.2 g) were distributed in aquariums of 160 liters (11 fish/aquarium), in a completely randomized 4x2 factorial design (n = 3). Diets were given three times daily until apparent satiety. The survival rate was 100% at the end of the experiment. The weight gain and the specific growth rate were influenced (p< 0.05) by crude protein and crude lipid and through the interaction between both. Feed intake was influenced by the lipid (p< 0.05) and protein (p< 0.05) concentrations in their feed, although the interaction between them was not significant (p> 0.05). The maximum feed efficiency was observed with 308 g kg-1 crude protein. Protein retention was inversely proportional (P< 0.05) to the dietary protein increment in diets with lower lipid concentration (110 g kg-1). The increase in dietary lipids decreased the demand for CP for maximum protein retention, estimated at 292.7 g kg-1 CP. Lipid concentrations affected (p A proteína é um nutriente de elevado custo e essencial para o crescimento dos peixes e o seu uso como fonte de energia é indesejável. No presente estudo avaliaram-se níveis de proteína bruta (200, 250, 300 e 350 g kg-1) e lipídios (110 e 140 g kg-1) em dietas para juvenis de tambatinga (Colossoma macropomum x Piaractus brachypomum) durante 63 dias. Foram distribuídos 264 juvenis (15,2 ± 0,2 g) em aquários de 160 litros (11 peixes/aquário), em um delineamento fatorial inteiramente casualizado 4×2 (n=3). As dietas foram fornecidas três vezes ao dia até a aparente saciedade. A taxa de sobrevivência foi de 100% ao final do experimento. O ganho de peso e a taxa de crescimento específico foram influenciados (p0,05). A máxima eficiência alimentar foi observada com 308 g kg-1 de proteína bruta. A retenção de proteína foi inversamente proporcional (P< 0,05) ao incremento da proteína dietética nas dietas com menor concentração lipídica (110 g kg-1). O aumento do lipídio das rações diminuiu a exigência de PB para a máxima retenção proteica, estimada em 292,7 g kg-1 PB. As concentrações de lipídios afetaram (p |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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