[Effect of cryopreservation on the acrosomal enzyme activity of the spermatozoa of rams]. / Vliianie na kriokonservatsiiata vurkhu aktivnostta na akrozomalnite enzimi na spermatozoidi ot koch.

Studied was the effect of cryoconservation on the activity of acrosine and acrosomal acid phosphatase of spermatozoa of rams stored in the form of pellets with the use of a diluent after Nagaze-Niva. It was found that the activity of acid phosphatase dropped by 35 per cent when stored in the course of 24 hours and 7 days. Acrosine was shown to be more stable at cryoconservation--its activity did not change under the same conditions of storing, however, it dropped by 30 per cent for 7 days. Admittedly, one of the reasons for the drop of the fertilizing capacity of ram spermatozoa after freezing was the drop of acrosomal enzyme activity. Most probably, the noxious factors were two--ultralow temperatures, and storage duration of spermatozoa.