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The aim of the study was to analyse the effect of a male mink single-dose hCG stimulation on the libido during the mating season and on blood testosterone levels after the season. The material involved males of American mink. The treatment-group males were administered a dose of 100, 150 or 200 U of hCG. Blood was collected twice, approx. 2 weeks prior to and on the completion of the mating season. The group receiving 100 U hCG had the highest percentage of males effectively copulating with females within the first 24 hours after stimulation, whereas males stimulated with a dose of 200 U hCG showed the lowest libido over the same period. On the other hand, males of the group stimulated with 150 U hCG mated to the highest number of females throughout the mating season. The mean plasma testosterone concentration in all the studied males on 18 February was 12.44 ng/ml. The drop in testosterone concentration at the end of the mating season was significant.

annals of animal science

Stimulatory Effect of hCG on Male American Mink (Neovison Vison) in the Breeding Season / Wpływ stymulacji hCG na samce norki amerykańskiej (Neovison vison) w okresie kryć