In contrast, plasma T and E2 concentrations were
lower during the combined GP(20 4), GP(30 8) and GP(40 16) after 12 h than after 16 h of injection. The combined
treatments (GnRHa PIM) are better compared with Ovaprim which gave the same results, they have some advantages, such as
reliable response and low cost. Ovaprim is more than 3 to 5-fold of the cost of (GnRH PIM). Therefore, this method could be
useful tool for commercial catfish breeders to ensure spawning success.
© 2012 Elsevi