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Chorulon for Fish

by the Fish Site Editor
24 March 2006, at 12:00am

By Intervet - Chorulon is a purified, sterile and highly effective preparation of chorionic gonadotrophin, which has been routinely used for nearly two decades to induce and synchronize the ovulation andspawning of various cultured fish species.

Chorulon® for Fish - By Intervet - Chorulon® is a purified, sterile and highly effective preparation of chorionic gonadotrophin, which has been routinely used for nearly two decades to induce and synchronize the ovulation and spawning of various cultured fish species.

Chorulon® provides the fish farmer with a tool to eliminate losses due to partial ovulation and spawning, as well as to enhance egg quality, milt production, sperm volume and motility, and resulting fertilization rates. In comparison with the traditionally used crude fish pituitaries, Chorulon® has several further significant advantages which have become increasingly important in today's modern and intensive fish farming industry:

Product: Readily available.
Purity: Highly purified.
Sterility: Sterile.
Disease risk: No risk of disease transmission.
Tolerance: Does not induce antibodies in fish.
Usage: Easy and ready to use.
Activity: High standardised biological activity.
Efficacy: Known dose response.
Response: Highly predictable latency time.
Fish loss: No need to kill donor fish.
Successful fish farming  depends on timely  management  of  the  fish's reproduction and spawning schedule
Successful fish farming depends on timely management of the fish's reproduction and spawning schedule

Chorulon® is the only hormonal spawning aid approved by the FDA in the USA for use in finfish (NADA no. 140-927). It is a freeze-dried preparation of human chorionic gonadotrophin (hCG) for administration after reconstitution in the accompanying sterile diluent. It has luteinizing hormone (GtH-II)-like activity with little or no follicle stimulating hormone (GtH-I) or oestrogenic activity.

Farmer with carp
Species like carp can benefit greatly from the use of Chorulon®

After reconstitution, Chorulon® is administered via intramuscular injection just ventral to the dorsal fin for one to three injections. Any single injection should be administered, depending on the fish species, at a dose of 110 to 1120 I.U./kg body weight (bw) for males and 150 to 4000 I.U./kg bw for females.

The Intervet Aquatic Animal Health Newsletter 4 (March 2002) contains more information on Chorulon for Fish.

For further details within the USA, please contact Intervet Inc. Customer Service:
Phone: 1 800 441 8272
Fax: 302 934 4237

If living elsewhere, please contact info.aqua@intervet.com

Source: Intervet - March 2002

the Fish Site Editor