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Effect of dietary carbohydrates and lipids on growth in cachama ( P iaractus brachypomus )
Author(s) -
VásquezTorres Wálter,
AriasCastellanos José Alfredo
Publication year - 2013
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2012.03183.x
Subject(s) - biology , carbohydrate , zoology , factorial experiment , fish <actinopterygii> , food science , biochemistry , fishery , statistics , mathematics
The effects of diets with three contents of carbohydrates and lipids were evaluated on the growing performance of cachama P iaractus brachypomus juveniles (initial weight 7.8 ± 0.49 g). The experiments were performed a 3 × 3 factorial design (200, 280 and 360 g of carbohydrates and 40, 80 and 120 g of lipids kg −1 ). Protein content was kept constant in 320 g kg −1 and digestible energy between 11.3 and 16.1 MJ kg −1 . Simple effects and interaction of factors on growth performance varied significantly ( P < 0.05) indicating dependence among them. The maximum weight gain was observed in fish fed 200 and 280 g kg −1 carbohydrates and 40 g kg −1 lipids. Increase of lipids from 80 to 120 g kg −1 reduced growth significantly. Protein efficiency rate and percentages of protein retention and energy were positively correlated with carbohydrate levels and no significant differences ( P > 0.05) were observed with the lipid levels. Results indicate that cachama utilizes carbohydrates as energy source more efficiently than lipids; likewise, lipid levels over 40 g kg −1 depress growth at any carbohydrates level.