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Feed intake, growth and nutrient utilization in Atlantic halibut ( Hippoglossus hippoglossus ) fed diets containing a bacterial protein meal
Author(s) -
Aas Turid Synnøve,
Hatlen Bjarne,
GrisdaleHelland Barbara,
Terjesen Bendik F,
Penn Michael,
BakkeMcKellep Anne Marie,
Helland Ståle J
Publication year - 2007
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.1365-2109.2007.01672.x
Subject(s) - hippoglossus hippoglossus , biology , halibut , feed conversion ratio , fish meal , zoology , meal , protein efficiency ratio , food science , fishery , endocrinology , body weight , fish <actinopterygii>
Triplicate groups of Atlantic halibut were fed diets containing 0%, 9% or 18% of a bacterial protein meal (BPM) produced from natural gas in a 9‐week trial. Growth rates, relative feed intake, feed efficiency ratio and retention of all indispensable amino acids were significantly lower in fish fed the 18% BPM diets than in those fed the 0% and 9% BPM diets. There were no significant treatment effects on urea levels in plasma, liver or muscle, or in uric acid levels in plasma. The hepatosomatic index was lowest in fish fed the 18% BPM diet. Although the concentration of copper, an element abundant in BPM, increased in the liver as dietary BPM level increased, the total copper content in liver decreased. Fish fed the 0% and 9% BPM diets had a higher degree of supranuclear vacuolization of pyloric caeca and mid‐intestine epithelia compared with fish fed the 18% BPM diet. In conclusion, the halibut fed the 9% BPM diet performed equally well as the control group regarding growth, feed intake and feed efficiency ratio, whereas performance was reduced in the fish fed the 18% BPM diet.