THE INFLUENCE OF FREQUENT SEMEN COLLECTIO N ON THE SEMEN QUALITY OF BEAGLE-DOGS

Semen was collected from 4 adult beagle-dogs twice weekly during six m onths. The libido did not alter and frequent semen collection did not deteriorate the investigated parameters. Because of a bad constitution , the semen quality of one male was not sufficient. The mean volume of the second fraction of the remainder slightly decreased from January until June from 1.2 to 0.5 ml. On the contrary the mean volume of the first and third fraction increased, mainly from April until May from 0 .3 to 1.0 (first fraction) and from 1.0 ml to 5.0 ml (third fraction), resp. The average of the sperm number/mu l augmented from month to mo nth from 71.3 to 324.4 x 10(3)/mu l. The transmigrationrate reached it s maximum in April (52.2%). The monthly average number of the percenta ge of morphologically abnormal spermatozoa correlated with the corresp onding transmigrationrate. There were negative, linear relationships b etween specific morphological abnormalities of spermatozoa and both es timated motility and transmigrationrate.