Impact of Some Hormone Combinations on Feed Utilization, RNA/DNA Ratio, Enzyme Activity, Growth and Survival of Pearlspot, Etroplus suratensis (Bloch)
Impact of Some Hormone Combinations on Feed Utilization, RNA/DNA Ratio, Enzyme Activity, Growth and Survival of Pearlspot, Etroplus suratensis (Bloch)
Date
2000
Authors
Sambhu, C
Jayaprakas, V
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India)Cochin
Abstract
Juveniles of pearlspot were reared by feeding diets enriched with steroid and protein
hormone combinations: Testosterone propionate (TP), Diethyl stilbestrol (DES) and Human
chorionic gonadotropin (HCG) at various doses for a period of 120 days and their growth
performance was evaluated. The dosages of the hormone combinations were TP 2.0 ppm+DES
1.0 ppm (Tj), TP 2.0 ppm+HCG 5.0 ppm (T2), DES 1.0 ppm+HCG 5.0 ppm (T3) and TP 2.0
ppm+DES 1.0 ppm+HCG 5.0 ppm (T4). The fishes which received diets containing
combinations of TP+HCG achieved the highest growth (40.10 g). Feed consumption, feed
conversion efficiency and nutrient digestibility were higher in this group. Digestive enzyme
activity was maximum (590.34 units/g tissue) in the intestine of fishes fed on diet containing
TP+HCG. The RNA/DNA ratio and protein contents in the muscle increased concomitant
with the high growth rate.
Description
Keywords
Growth promoters, hormone combinations, digestive enzyme, RNA/DNA ratio, Etroplus suratensis
Citation
Fishery Tech 37(2):109-115