Author/Authors :
Mohammad Sadegh Aramli، Mohammad Sadegh نويسنده Aquaculture Department, Tarbiat Modares University, Noor, Mazandaran, Iran , , Kalbassi، Mohammad Reza نويسنده Ph.D. Student, Department of Fisheries, Faculty Science, Tarbiat Modares University, Noor, Iran , , Nazari، Rajabmohammad نويسنده Rajaee Sturgeon Hatchery Center, Sari, P.O. Box 833, Sari, Mazandaran, Iran ,
Abstract :
Knowledge of the reproductive physiology of wild sturgeon populations is critical to ensure the survival of this unique group of animals. This experiment was designed to explore the physiological relationships between the seminal plasma composition (ionic and organic contents as well as osmolality) and sperm motility in the Persian sturgeon (Acipenser persicus). In this regard, 17 brood fish were injected intramuscularly by LHRH-A2 (5?gKg -1) for spermiation induction. According our results, the seminal plasma contained 59.53±2.56 mM/l sodium, 9.1±1.42 mM/l chloride, 4.72±0.3 mM/l potassium, 1.45±0.075 mM/l calcium and 0.7±0.072 mM/l magnesium. 0.11±0.02 g/dl total protein, 22.18±4.16 mg/dl glucose, 6.67±1.04 mg/dl cholesterol and 15.2±0.65 mg/dl triglyceride. The total duration of sperm movement was obtained 288.01±14.44 second. The osmolality of seminal plasma ranged from 47 to 176 mOsmol kg1. Significant positive relationships were determined between sperm motility vs. K+ ion (r=0.718, p < 0.01) and total protein (r=0.670, p < 0.01). No significant correlations were found between sperm motility and others composition of the seminal plasma. Presented data could be considered as a complementary study for developing special extenders and protectant solutions for improving artificial fertilization in this valuable species.
