Abstract. BLAD (bovine leukocyte adhesion deficiency) and DUMPS (deficiency of uridine monophosphate synthase) are hereditary lethal autosomal recessive disorders that may affect Holstein cattle. The aim of the present study was to evaluate the frequency of BLAD and DUMPS genotypes in the Polish population of dairy cows. In the study 5 732 Polish Holstein-Friesian females were genetically tested for BLAD and DUMPS. Results of the present study indicate that the Polish population of dairy cattle is free from DUMPS as there were not carriers nor sick animals. For BLAD the study confirmed the present of carriers in the population to be at a low value (0.21%). Both BLAD and DUMPS may strongly affect the profitability of a dairy farm, therefore, in order to avoid the economic losses caused by the presence of these genetic disorders in the herd it is important to screen the population and detect carriers as soon as possible.
Abstract. The study was aimed to evaluate a possible effect of body condition of female farmed mink (Neovison vison) at the moment of conception on their prospective reproduction and behavior. 601 Perl mink females at age 1 and 2 years were assigned to one of five groups according to their body condition. The following parameters were analyzed: gestation and diapause lengths, litter size, live-born litter size, number of weaned per litter, female barrenness, and the incidence of fur-chewing. The effect of body condition was more pronounced in yearling females, where the largest litters, the highest number of live-born per litter, and the highest weaning success were found in the group with the ideal body condition. In both age groups, the shortest pregnancies and diapause periods were observed in the thinnest females. Fur-chewing was most often noticed in either the thinnest or the most obese animals; females of these groups also exhibited the highest rates of barrenness. Consequently, the lowest incidence of fur-chewing, female barrenness were found in females with ideal body condition.