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Skulls of 65 American minks from the West Pomeranian Province were examined (farm: n = 33, male: n = 16, female: n = 17; wild: n = 32, male: n = 20, female: n = 12). Craniometric parameters in the number of 24 were determined and measured on each skull. Results were averaged and compared, maintaining the division into sex groups. Males were found to have statistically significant differences between...
The aim of the study was to determine the effect of hormonal stimulation during the mating season on reproduction performance in American mink females and a selection of both the hormonal formulation and its dosage. The study involved one-year old Pearl females of mink (Neovison vison). The females received one of two hormonal formulations, F1 or F2, with a single injection administered 24 hours before...
Currently in the natural environment tigers live in areas of eastern Turkey, through southern Asia to southeastern Siberia, Malay Peninsula and Sumatra, Java and Bali. Generally, the area of occurrence of these predators declined and some subspecies extincted, for example Javanese tiger, Balinese tiger, the Caspian tiger. Zoos are therefore still places where you can see live the big cats. They are...
The experiment was aimed to observe the behavior of ranch American mink females during the breeding season. The study was conducted on a group of 11 females of the color type Pearl, which were admitted to a male each day during the 13-day mating period. Each successful mating was noted, which allowed the capture the length of naturally variable intervals between mating encounters, and the number of...
The aim of this study was to evaluate the effect of litter size at birth on offspring raising and an attempt to establish the litter size that would be optimal for the nursing process. We analysed litters of 390 one-year-old females of three color types: Black Velvet (or short NAP), Hedlund White, and Silverblue. Each study group comprised 130 mink. Within each group, we analysed the litter size and...
The aim of this study was to compare the characters of the pectoral girdle morphological elements between the wild and captive, farm-bred forms of the red fox. The study was conducted on the humeri, radii, ulnae, and scapulae collected from 24 wild and 20 farmed red foxes. Each individual was posthumously measured for body weight and natural length, and the bones of the anterior girdle were collected...
The aim of this study was to analyze the effect of gestational length and multiplicity of mating encounters on selected reproductive parameters within several color varieties of the mink. The material comprised the breeding results of 1285American mink females of three color varieties: Sapphire, Silverblue, and the Scanbrown. The highest fertility and the highest number of live born and weaned per...
The aim of this study was to analyze the effect of gestational length and multiplicity of mating encounters on selected reproductive parameters within several color varieties of the mink. The material comprised the breeding results of 1285American mink females of three color varieties: Sapphire, Silverblue, and the Scanbrown. The highest fertility and the highest number of live born and weaned per...
The aim of this study was to determine the effect of animal handling, defined as the so-called human factor, on the level of reproductive parameters of female mink.We analyzed some reproductive parameters of 6 348 one- and two-year-old Scanbrown females, such as fertility, prolificacy and rate of rearing the young. Mink were divided into four groups; group I and II consisted of one-year-old females,...
The study was aimed to determine the effect the arrangement of males in breeding sets on the level of selected reproductive parameters. The experiment consisted in alteration of the standard arrangement of animals in breeding sets prepared prior to mating. The modification consisted in an arrangement of males in cages so that each male was placed in the immediate vicinity of two females. The following...
Oxidative metabolism is essential for the gamete and the embryo energy production and is unavoidably associated with generation of reactive oxygen species (ROS). Enzymatic antioxidant defenses are present in the mammalian oocytes, embryos and follicular fluid (FF). An addition of porcine FF to maturation media have positive effects on the IVM and IVF results. The aim of this study was to study the...
Celem pracy była analiza płodności, plenności oraz wskaźnika odchowu samic norek pięciu odmian barwnych: Scanblack, Sapphir Cross oraz biała Hedlund White w okresie trzyletnim (2007–2009), a także Scanblack Velvet, biała Regal i Sapphire Cross w okresie dwuletnim (2008–2009). Analiza wskazanych parametrów miała na celu wykazanie jak kształtują się one u tych samych samic różnych odmian barwnych na...
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