Effect of Hormones on Growth and Food Utilization of the Indian Major Carp, Cirrhinus mrigala
Effect of Hormones on Growth and Food Utilization of the Indian Major Carp, Cirrhinus mrigala
Date
1996
Authors
Jayaprakas, V
Sindhu, B.S
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India)Cochin
Abstract
The influence of human chorionic gonadotropin (HCG) and testosterone propionate
(TP) at the dosages of 10 ppm and 3 ppm respectively, and their combination (HCG+TP)
of 8 ppm and 1.5 ppm on the growth, food conversion, digestibility, enzyme activity, nucleic
acid content. Oxygen consumption and ammonia excretion of the Indian Major Carp,
Cirrhinus mrigala was assessed. The experiments were conducted in cement tanks (5x4x1 m)
for 98 days by feeding hormones through fish meal based prepared diet having 35% protein.
Growth of C. mrigala was high in hormone fed fishes than the control with the maximum
growth recorded in the HCG treatment followed by HCG+TP, TP and control. Specific
growth rate (SGR), food conversion efficiency (FCE), apparent protein and lipid digestibility
were high in hormone fed fishes (p < 0.01) than the control. The enzyme activity in the
foregut, midgut and hindgut showed marked variation with the highest activity noticed in
the foregut followed by midgut and hindgut. The rates of oxygen consumption and
ammonia excretion of hormone fed fishes were found to be not significantly different from
control (P > 0.05). The hormones stimulate growth through increasing the appetite and
enhancing food utilization and protein synthesis.
Description
Keywords
Hormones, growth, food utilization, Cirrhinus mrigala
Citation
Fishery Tech 33(1):21-27