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Felska-Błaszczyk L, Ławrów N, Lasota B, Seremak B, Pęzińska-Kijak K, Żuk K, Nowak P. The sex ratio in farmed American mink (<i>Neovison</i> <i>vison</i>). Arch Anim Breed 2018. [DOI: 10.5194/aab-61-359-2018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract. The aim of the study was to analyse the sex ratio of American mink litters in
relation to dam's age, gestation length, and time interval between the first
and second mating. The observations were carried out on a mink farm located
in northern Poland. The analysis involved litters of 207 females, aged 1 (n=107) and 2 years (n=100), which successfully raised all the born kits.
The sex of the offspring was identified on weaning. The kits were assigned to
groups according to their dam's gestation length, mating date, and
first-to-second mating interval. It was found that female kits quantitatively
predominated over male offspring. Longer pregnancies, delayed mating time,
and greater interval between the first and second mating was accompanied by a
higher number of female births in relation to male births.
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