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Effects of three dietary protein levels on the growth of pacu, Colossoma mitrei Berg, in cages
Author(s) -
MEROLA N.
Publication year - 1988
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.1365-2109.1988.tb00417.x
Subject(s) - pacu , biology , zoology , body weight , dietary protein , piaractus mesopotamicus , feed conversion ratio , cage , fishery , endocrinology , mathematics , combinatorics
. Artificially reproduced pacu, Colossoma mitrei Berg, fingerlings (initial weight 41 g) were stocked (100/m 3 ) in plastic cages (1·0m 3 ) within a freshwater reservoir. Three diets containing 30, 35 and 40% protein were tested in quadruplicate over a 76‐day experimental feeding period. Fish were fed 7 days a week, twice daily at a feeding regime of 4% body weight/day from stock to 100g and thereafter at 3% until harvest. Mean water temperature over the trial was 26·7°C. Significant differences were observed in total and daily gain and in protein efficiency ratio, while no differences were obtained in the feed conversion ratio between treatments. Based on this study a 35% protein ration is recommended for pacu within floating cages.