Open AccessEvaluation of carbohydrate rich diets through common carp culture in manured tanks
Author(s) -
KESHAVANATH P.,
MANJAPPA K.,
GANGADHARA B.
Publication year - 2002
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1046/j.1365-2095.2002.00202.x
Subject(s) - fish meal , biology , amylase , carbohydrate , lipase , food science , zoology , feed conversion ratio , carp , common carp , composition (language) , fish <actinopterygii> , body weight , cyprinus , biochemistry , enzyme , fishery , linguistics , philosophy , endocrinology
Four diets (T 0 –T 3 ) were formulated reducing the fishmeal (Indian) component by 100 g kg –1 from 300 to 0 g kg –1 and including proportionately increasing quantities of maize. Diets were fed for 120 days at 50 g kg –1 body weight to triplicate groups of common carp (av. wt. 2.11–2.18 g) stocked at 1 m –2 in mud bottomed cement tanks (18 m 2 ), fertilized with poultry manure. Fish growth, SGR and FCR in the different treatments were statistically not significantly different ( P > 0.05). PER was lowest for the 300 g fishmeal kg –1 diet treatment (diet T 0 ), increasing with decrease in dietary fishmeal content (diets T 1 –T 3 ). Fish survival ranged from 96.29 to 100%. Diets influenced carcass composition and digestive enzyme activity. A significant increase in lipid deposition was recorded with increasing dietary carbohydrate content. Amylase, protease and lipase activities were higher in fish fed with diets T 2 and T 3 . The protein sparing effect of dietary carbohydrate and the economic implication of eliminating fishmeal from the diet are discussed.