Changes in Ionic Ratios of Seminal Plasma and its Effect on Sperm Characteristics in Caspian Roach (Rutilus rutilus caspicus) During Spawning MigrationA Golpour*, MR Imanpoor, SA Hosseini
Fisheries Faculty, Gorgan University of Agricultural Science and Natural Resource, Gorgan, Iran
- *Corresponding Author:
- Amin Golpour
E-mail: [email protected]
Accepted date: April 01, 2011; Published date: April 30, 2011
In this study, changes of ionic ratios (Na+ to K+, Na+ to Ca+2, Na+ to Mg+2, K+ to Ca+2, K+ to Mg+2 and Ca+2 to Mg+2) during spawning migration of roach and its effect on sperm motility traits (sperm movement duration, percentage of motile spermatozoa) and sperm production characteristics (spermatocrit, sperm density and sperm volume) were investigated. Sperm of 30 males was collected during the spawning migration (February, March and April). Ionic ratios of Na+ to K+, Na+ to Ca+2 and Ca+2 to Mg+2 significantly changed (P<0.05) between three terms, but Na+ to Mg+2, K+ to Ca+2 and K+ to Mg+2 ratios did not show significant differences (P>0.05) between February, March and April. The results suggested that sperm movement duration is slightly influenced by (P<0.05) Na+ to K+ ratio. A similar tendency was observed in values of spermatocrit and percentage of motile spermatozoa due to Na+ to Ca2+ ratio. Also, Ca+2 to Mg+2 ratio influenced percentage of motile spermatozoa. The present study describes that biochemical composition (Ionic ratios) and semen characteristics will help in development of the basic knowledge and the strategies during artificial spawning programmes in this species.