Search for: [Description = "The macroscopic structure of the male genital organs in the European beaver \(Castor fiber Linnaeus, 1758\) is described on the basis of anatomical preparation. Studies were made of 10 carcasses of European beavers at different periods in the life of these animals, this number consisting of 4 newborn beavers, 3 males from 6\-12 months old and 3 adult males from 3\-7 years old."]

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