Growth and haematology of pacu, Piaractus mesopotamicus, fed diets with varying protein to energy ratio
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
18/10/2012
18/10/2012
2009
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Resumo |
Haematopoiesis and blood cells` functions can be influenced by dietary concentration of nutrients. This paper studied the effects of dietary protein:energy ratio on the growth and haematology of pacu, Piaractus mesopotamicus. Fingerling pacu (15.5 +/- 0.4 g) were fed twice a day for 10 weeks until apparent saciety with diets containing 220, 260, 300, 340 or 380 g kg(-1) crude protein (CP) and 10.88, 11.72, 12.55, 13.39, 14.22 MJ kg(-1) digestible energy (DE) in a totally randomized experimental design, 5 x 5 factorial scheme (n=3). Weight gain and specific growth rate were affected (P < 0.05) by protein level only. Protein efficiency ratio decreased (P < 0.05) with increasing dietary protein at all levels of dietary energy. Daily feed intake decreased (P < 0.05) with increasing dietary energy. Mean corpuscular haemoglobin concentration was affected (P < 0.05) by DE and interaction between dietary CP and DE. Total plasma protein increased (P < 0.05) with dietary protein and energy levels. Plasma glucose decreased (P < 0.05) with increasing dietary protein. The CP requirement and optimum protein:energy ratio for weight gain of pacu fingerlings, determined using broken-line model, were 271 g kg(-1) and 22.18 g CP MJ(-1) DE respectively. All dietary CP and DE levels studied did not pose damages to fish health. Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)[05/51968-9] Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)[05/51967-2] Brazil`s `Conselho de Desenvolvimento Cientifico e Tecnologico (CNPq)` |
Identificador |
AQUACULTURE RESEARCH, v.40, n.4, p.486-495, 2009 1355-557X http://producao.usp.br/handle/BDPI/19300 10.1111/j.1365-2109.2008.02120.x |
Idioma(s) |
eng |
Publicador |
WILEY-BLACKWELL PUBLISHING, INC |
Relação |
Aquaculture Research |
Direitos |
restrictedAccess Copyright WILEY-BLACKWELL PUBLISHING, INC |
Palavras-Chave | #Piaractus mesopotamicus #haematological parameters #biochemical parameters #non-protein energy #protein requirement #JUNDIA RHAMDIA-QUELEN #CRUDE PROTEIN #BODY-COMPOSITION #FEED-UTILIZATION #RAINBOW-TROUT #CARBOHYDRATE-LEVELS #REFERENCE INTERVALS #DIGESTIBLE ENERGY #CHANNEL CATFISH #SALMO-GAIRDNERI #Fisheries |
Tipo |
article original article publishedVersion |