Effect of dietary supplementation of l-tryptophan on thermal tolerance and oxygen consumption rate in Cirrhinus mrigala fingerlings under varied stocking density

A 60 day feeding trial was conducted to study the effect of dietary l-tryptophan on thermal tolerance and oxygen consumption rate of freshwater fish, mrigala, Cirrhinus mrigala reared under ambient temperature at low and high stocking density. Four hundred eighty fingerlings were distributed into ei...

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Bibliographic Details
Published in:Journal of thermal biology 2014-04, Vol.41, p.59-64
Main Authors: Tejpal, C.S., Sumitha, E.B., Pal, A.K., Shivananda Murthy, H., Sahu, N.P., Siddaiah, G.M.
Format: Article
Language:English
Subjects:
Animals
Body Temperature Regulation
Carps - growth & development
Carps - metabolism
Carps - physiology
Cirrhinus mrigala
CTMax, CTMin, LTMax, LTMin
Density
Dietary Supplements
Diets
Fish
High density
l-tryptophan
Maxima
Oxygen Consumption
Oxygen consumption rate
Stockings
Thermal tolerance
Tolerances
Tryptophan - administration & dosage
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Summary:A 60 day feeding trial was conducted to study the effect of dietary l-tryptophan on thermal tolerance and oxygen consumption rate of freshwater fish, mrigala, Cirrhinus mrigala reared under ambient temperature at low and high stocking density. Four hundred eighty fingerlings were distributed into eight experimental groups. Four groups each of low density group (10 fishes/75L water) and higher density group (30 fishes/75L water) were fed a diet containing 0, 0.68, 1.36 or 2.72% l-tryptophan in the diet, thus forming eight experimental groups namely, Low density control (LC) (basal feed +0% l-tryptophan); LT1 (basal feed+0.68% l-tryptophan); LT2 (basal feed+1.36% l-tryptophan); LT3 (basal feed+2.72% l-tryptophan); high density control (HC) (basal feed+0% l-tryptophan); HT1 (basal feed+0.68% l-tryptophan); HT2 (basal feed+1.36% l-tryptophan); and HT3 (basal feed+2.72% l-tryptophan) were fed at 3% of the body weight. The test diets having crude protein 34.33±0.23 to 35.81±0.18% and lipid 423.49±1.76 to 425.85±0.31KCal/100g were prepared using purified ingredients. The possible role of dietary l-tryptophan on thermal tolerance and oxygen consumption rate was assessed in terms of critical thermal maxima (CTMax), critical thermal minima (CTMin), lethal thermal maxima (LTMax) and lethal thermal minima (LTMin). The CTMax, CTMin, LTMax and LTMin values were found to be significantly higher (p
ISSN:0306-4565
1879-0992
DOI:10.1016/j.jtherbio.2014.02.008