Evaluation of semen and urine of pike (Esox lucius L.): Ionic compositions and osmolality of the seminal plasma and sperm volume, density and motility
The estimation of quantitative and qualitative characteristics of pike sperm has been evaluated. Moreover, the effects of experimental urine addition on sperm motility and velocity were studied. In general pike sperm stripped (SPZs) and testicular (SPZt) were activated immediately, and 59 to 91% became motile. The velocity of SPZs and SPZt activated by distilled water and by urine ranged from 163.3 to 172.5 ± 38.7 μm.s-1 immediately post-activation. Interestingly, the sperm activated by urine occasionally swam for up to 3 min. In conclusion, our study strongly suggests that the differences observed in terms of both SPZs/SPZt could be explained as a due of contamination by urine.