Ovaprim Dosage on the Spawning Performance of Cyprinus carpio

Abstract

The aim of the present study was to evaluate the
fecundity and hatchability of common carp administered
ovaprim diluted with 0.9% saline water at
a ratio of 1:1, 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8 1:9 and
1:10 with 1:0 serving as the control. The diluted
hormones were injected to brood fish at a dose of
0.5 ml kg-1. The study observed that latency period
lasted between 8th and 11th h after hormonal
administration and higher dilution levels delayed
striping time compared to the control and the first
two dilution levels. Cyprinus carpio did not respond
to 1:9 and 1:10 dilutions of ovaprim. Consequently
fecundity and hatchability decreased as the level of
dilution increases. The optimum dilution of ovaprim
to induce ovulation for reducing the cost of hatchery
operation in common carp was found 1:5 in 0.9%
normal saline. Beyond this dilution, fecundity and
hatchability are greatly affected.