Induced Spawning of Bighead Carp, Aristichthys nobilis (Richardson), by Using Different Hormones/ Hormonal Analogues

Two available ovulation inducing preparation Gonadotropin release hormone analogues with

dopamine receptor antagonists viz. Ovaprim-C and Ovatide were tested in Pakistan on bighead carp Aristichthys

nobilis. They were tested alone and in combination with Profasi (Human Chorionic Gonadotropin) to compare weight

of eggs (g), weight of eggs (percentage of female body wt.), number of eggs / spawning, fertilization rate, percentage

of hatching rate and number of three day old fry in four groups of fishes. Results were better in group II treated with a

combination of Ovaprim + profasi. Females of this group had a significantly greater weight of eggs (in grams as well

as percentage of female body weight) p>0.05). Similarly percentage of hatching rate and number of three day old fry

(in number) were significantly higher (p>0.05) than rest of the treatments. The lower values were found in group III

treated with Ovatide alone. The results of present experiment permit the recommendation of Ovaprim + profasi for

stimulation of better ovulation in females of bighead carp.