Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 14 4 2015 10 01 The influence of ovarian fluid on the sperm physiology of Rutilus kutum 818 825 114485 10.22092/ijfs.2018.114485 EN A Golpour M Esfandyari H Dadras Journal Article 2018 01 02 Motility parameters of the spermatozoa in most fish species spawning in fresh water like Rutilus kutum lasts for a short time after activation. Ovarian fluid significantly influenced sperm motility (motility duration period) and percent motility (progressive forward motile sperm). Both of these variables generally increased as the concentration of ovarian fluid increased from 33% to 50%, respectively. It is concluded that ovarian fluid enhances sperm movement in this species at appropriate level and thus has the potential to influence fertilization capacity. https://jifro.areeo.ac.ir/article_114485_f28d142a0a139d8fb8a830eee35ad215.pdf