Administration of Arginine Vasotocin and modified Isotocin improve artificial propagation and post-spawning survival of female yellow catfish

Arginine-Vasotocin Neuronal System in Steindachneridion parahybae (Siluriformes: Pimelodidae) and Its Influence on Artificially Induced Spawning in Captivity

“…A positive correlation between mPOA, gPOA, and pPOA with GnRH (cfGnRH and cGnRH-II) and β-LH were observed in practically all groups. These results aligned with the existing literature, demonstrating that the combination of GnRH and AVT during artificial induction, especially with the second dose injection, does not significantly impact the efficiency of spawning, egg production, fertilization rate, hatching rate, or survival rate postspawning [57]. Although the present study did not inject AVT, a positive correlation between GnRH, β-LH, and progestins with AVT can suggest that AVT is a powerful indicator in the induction of S. parahybae as well.…”

“…In the electric fish species Gymnotus omarorum and Brachyhypopomus gauderio, AVT-ir fibers run ventro-caudally to the pituitary and the lateral and ventral hypothalamus [22], likely indicating the location of GnRH neurons. There is a colocalization of AVT receptor with GnRH in hypothalamic neurons of rock hind (Epinephelus adscensionis) and corvina blanca (Micropogonias albus) [57]. In S. parahybae, an anatomical overlap between GnRH [10] and AVT (present study) was also identified.…”