Abstract: Two distinct nonapeptide systems, vasotocin- and oxytocin-related peptides, evolved in vertebrates. Their role in male zebrafish reproduction has not been formally investigated. We hypothesized that the teleost nonapeptides vasotocin and isotocin stimulate male zebrafish reproductive physiology and success by affecting central neuronal and/or peripheral endocrine pathways. Pharmacological inhibition experiments revealed that both vasotocin and isotocin contribute significantly to male reproductive success, which in the case of vasotocin correla...
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Topics: 
Internal medicine
Endocrinology