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2012 | 11 | 3 |
Tytuł artykułu

Plasma concentrations of progesterone and testosterone in pregnant mink (Neovison vison) depend on fur-color variety of the female

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Warianty tytułu
Stężenie progesteronu i testosteronu w osoczu krwi ciężarnych norek (Neovison vison) w zależności od odmiany barwnej i terminu pobrania krwi
Języki publikacji
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 litter were achieved by Silverblue females.Within all the analyzed gestational length intervals in each color variety, the pregnancies with a length of 45 to 55 days were dominant (78.1% for Sapphire, 75.78% for Silverblue and 64.75% for Brown), while the lowest percentage (3.17% for Sapphire, 6.88% for Silverblue and 3.25% for Brown) represented the pregnancies lasting up to 44 days. The study shows that with an increase in the length of gestation litter sizes become smaller, which is consistent with reports of other authors conducting similar research on this group of animals.We observed an increase in the average litter size with an increase in the number of mating encounters within all analyzed mink color varieties.
Celem pracy było określenie stężenia progesteronu i testosteronu w osoczu krwi pobranej w różnych terminach od ciężarnych norek różnych odmian barwnych. Krew pobrano od czternastu ciężarnych samic norek: siedmiu samic odmiany standardowej brązowej typu wild i siedmiu samic odmiany czarnej, tzw. short NAP. Krew pobierano siedmiokrotnie – pierwszy raz przed rozpoczęciem kryć, a ostatni raz na około trzy tygodnie przed porodem. Stężenia hormonów oznaczono metodą immunofluorescencyjną przy użyciu zestawów firmy Delfia® Perkin- ElmerWallac Oy, Turku (Finland) z wykorzystaniem zjawiska fluorescencji pierwiastków. Stężenie progesteronu i testosteronu we krwi pobranej od samic w różnych terminach różniło się statystycznie istotnie. Wykazano statystycznie istotne różnice w stężeniu progesteronu i testosteronu w osoczu krwi ciężarnych norek w zależności od odmiany barwnej. Stężenie obydwu badanych hormonów w osoczu ciężarnych norek było ze sobą dodatnio skorelowane.
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  • Department of Animal Anatomy, West Pomeranian University of Technology, Doktora Judyma 14, 71-466 Szczecin, Poland
  • West Pomeranian University of Technology, Szczecin, Poland
  • West Pomeranian University of Technology, Szczecin, Poland
  • West Pomeranian University of Technology, Szczecin, Poland
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