Growth and haematology of pacu,Piaractus mesopotamicus, fed diets with varying protein to energy ratio

• DOI: 10.1111/j.1365-2109.2008.02120.x
• Publication Date: 2008-10-15T12:34:28Z
• Authors: Álvaro José de Al...; Ricardo Yuji Sado; José Eurico Posse...
• Keywords: Piaractus mesopotamicus; Dietary protein

Haematopoiesis and blood cells' functions can be influenced by dietary concentration of nutrients. This paper studied the effects protein:energy ratio on growth haematology 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) 10.88, 11.72, 12.55, 13.39, 14.22 MJ digestible energy (DE) in totally randomized experimental design, 5 × factorial scheme (n=3). Weight gain specific rate affected (P<0.05) level only. Protein efficiency decreased increasing at all levels energy. Daily feed intake Mean corpuscular haemoglobin was DE interaction between CP DE. Total plasma increased levels. Plasma glucose protein. The requirement optimum weight fingerlings, determined using broken-line model, 271 22.18 MJ−1 respectively. All did not pose damages to fish health.