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Syndel is proud to be your exclusive source for the most efficacious and modern products for induced spawning of fish.   These include Ovaprim™, the most widely used induced spawning product in the world, and Ovaplant™,  our newest spawning product which features the sustained sustained release of the spawning agent.

As long as people have been culturing fish in an intensive or semi-intensive manner there has been a desire to control  Please activate Java...  

and maximize the production of eggs and the resultant seed stock.

Many years ago it was recognized that the brain and specifically the pituitary gland was able to be used in the manipulation of spawning activity. The traditional artisanal method has been to use donor fish. The aquaculturist would maintain excess livestock that would then have it's pituitary gland harvested, homogenized and re-injected into the designated broodstock. This was a very expensive, time consuming, messy and somewhat hit or miss procedure.
 

 The pituitary glands needed to be used immediately or stored frozen for a short time. A some point it was determined that by harvesting the pituitary glands from mature fish that were being processed for market and processing them to a dry powder, the process could be more controlled. The resultant Carp ADP and Salmon ADP were more cost effective but were often not predictable or effective. Additionally, with these products were always possibilities of allergic type reactions.

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Many other things were tried over the years with the most useful being Human Chorionic Gonadotropin (HCG). This product was extracted from the urine of pregnant women. Because of the source it suffered from similar drawbacks of the dried pituitary products.

None of these naturally occurring products worked on all (or even a large number) of species or even all of the time on one species of fish.

Years of research into the physiology of spawning fish resulted in the first generation of synthetic spawning products. The most efficacious of these was LHRHa, which designates a specific mammalian peptide analogue. This product has mammalian activity so must be handled with care. This product had a wide range of applicability across many species but there were still many different fishes that could not be spawned with this peptide.

img_ovaplant2.gif (17283 bytes)Continuing research brought to light many other interesting facets of fish reproduction. One of the most important is that there is no one product or presentation that will work with every fish every time. It also brought to light the differences in natural peptides present in fish. Many analogues were developed and tested. It was also discovered that many species required the inhibition of dopamine production to ensure that the spawning sequence could be initiated. It was also discovered that many species require a prolonged dose of peptide to initiate the spawning sequence and bring it to completion.

This research has resulted in Syndel having three extremely effective induced spawning products. Ova-RH is most effective peptide analogue developed. Ovaprim™ contains this peptide and a dopamine antagonist. Ovaprim™ is the most widely used induced spawning product in the world and has been used in virtually every country. Ovaplant™ is the most recent advance in induced spawning products and is widely used in species that require a sustained release of peptide to initiate the spawning sequence.

 

  
 

All material, unless otherwise specified, is copyrighted by Syndel Laboratories Ltd., 1999-2007.


Website updated -  May 17, 2007

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