Authors : Faruk ARAL , Erdin? ?AH?N?Z and Zafer DOGU
Abstract: The objective of this study was to investigate annual changes of sperm quality parameters in young rainbow trouts during spawning season. Experiment was performed using 10 rainbow trout males reared in Ataturk damlake in Turkey. Sperm samples were collected and evaluated at approximately 15-day intervals from 9 January to 10 April 2003. In collected milt; volume of milt, sperm motility percentage, the duration of forward motility, sperm concentration and sperm pH were evaluated. On 9 January 2003; 20 % of the males were spermiating, increasing to 100 % in early February and dropping to 40 % by early April. Sperm motility percentage showed a significant improvement during the spawning season (P<0.05). Sperm concentration was significantly (P<0.01) improved in milt collected from late of January to early of March. The pH in sperm was significantly (P<0.001) higher in February than at any other time of the spawning season. Milt volume and the duration of forward motility showed no obvious differences. In conclusion, the results show that season has a significant influence on semen quality in young rainbow trouts corresponding to spawning season in hot arid. Sperm of good quality was especially collected in february and in March
Faruk ARAL , Erdin? ?AH?N?Z and Zafer DOGU , 2005. Annual Changes in Sperm Characteristics of Young Rainbow trout (Oncorhynchus Mykiss W., 1792) During Spawning Season in Ataturk Dam Lake, Sanliurfa, Turkey . Journal of Animal and Veterinary Advances, 4: 309-313.