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Electro-Ejaculation of Mink (Mustela Vison)

Michigan State University, ^,2 East Lansing 48823

Abstract

Semen was obtained from 122 of 147 attempted electro-ejaculations of 40 male ranch mink during the 1969 breeding season. Both anesthetized and unanesthefized mink were ejaculated using a bi-polar rectal electrode and an electrical stimulus of from 2 to 8 volts and 0.15 to 0.6 milliamperes applied for approximately 4 seconds and repeated at 10-sec. intervals. The average number of stimuli required to obtain an ejaculation was 7.3±.56. Sperm per ejaculate ranged from 0.5 to 12.5 x 106 with a mean of 3.75 x 10⁶. The average volume of semen per ejaculate was .021 milliliters. Sperm motility in various extenders was estimated and some sperm abnormalities described.

¹ The authors wish to express their thanks to Mr. Bryan Larsen, Mr, Sulo Hulkonen and Miss Shirley Eymer for their technical assistance. This research was sponsored in-part by a grant-in-aid from the Mink Farmers' Research Foundation, Milwaukee, Wisconsin and was published with the approval of the Michigan Agricultural Experiment Station as Journal Article No. 4878.

² Fur Animal Project, Department of Poultry Science.