Spermiation induction in the common bream (Abramis brama) using sGnRHa and domperidone (Ovaprim): Sperm production, seminal plasma composition, and spermatozoa motility and fertilizing ability

In cyprinids aquaculture, the implication of gonadotropin-releasing hormone analogues (GnRHa) in combination with a dopamine inhibitor has been suggested to induce spermiation. The study investigated the efficiency of Ovaprim (consists of 20 μg (D-Arg6, Pro9NEt)-sGnRH and 10 mg domperidone per mL) on spermiation in the common bream, Abramis brama. The males (n = 10 in each group) with a mean body weight of 863.2 ± 22.8 g were injected with 0.25 or 0.5 mL kg−1 Ovaprim at the spawning season. The control group was injected with physiological saline. To evaluate hormonal therapy, sperm production, motility and fertilizing ability were assessed together with some biochemical characteristics of seminal plasma. The hormonally treated groups produced more sperm in volume with higher total number of spermatozoa (P