Published in Scientific Papers. Series D. Animal Science, Vol. LXVIII, Issue 2
Written by Silvia RADU, Gheorghe DOBROTĂ, Nicoleta DOBROTĂ, Mioara COSTACHE, Nino MARICA
The successful induction of spermiation in sturgeon species is critical for artificial reproduction and aquaculture development. Polyodon spathula (Walbaum, 1792), a commercially valuable fish species, presents challenges in reproductive management under controlled conditions. This study investigates sperm quality parameters in P. spathula males reared in captivity. Five sexually mature males, aged between 9 and 11 years, were selected. Sperm quality was evaluated through macroscopic and microscopic assessments. Hormonal stimulation was performed using Nerestin 5A at doses of 0.05, 0.1, and 0.15 ml/kg body weight in three experimental groups. A fourth male received carp pituitary extract (1.0 ml/kg body weight), and a fifth served as control, receiving physiological saline (0.5 ml/kg body weight). Sperm was collected daily for four consecutive days. The highest sperm yield was recorded with Nerestin 5A at 0.15 ml/kg, producing an average of 2.6 × 10⁹ spermatozoa/kg body weight. These findings underscore the superior efficacy of Nerestin 5A in inducing spermiation in P. spathula, compared to traditional carp pituitary extract or saline solution.
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