Preservation of the gene pool of animals and plants and, above all, rare and endangered species is one of the main tasks of environmental protection and international efforts in this area. Today, there are many different programs, the actions of which are focused on the preservation of the population and the study of diseases of the Amur tiger. The study of internal organs, in particular, the features of the female genital organs, is timely and relevant, since their morphological and functional state affects the reproduction and effective adaptation of populations to habitat changes. Some scientists have studied the internal organs of large wild felines, including the Amur tiger. However, morphometric changes in the genitals of female Amur tigers in the comparative age aspect have not been studied. In the course of the morphometric studies, it was found that body weight, in contrast to body length, in female Amur tigers increased rapidly from the age of six months to one and a half years. The left ovary, like the left uterine horn, is larger in all female Amur tigers of different ages. The length of the body of the uterus and ovaries, the relative length of the complex of reproductive organs to body length increased more intensively from the age of six months of females to one and a half years, and less actively – from one and a half to three years of age. This indicates a significant increase in the body length and internal reproductive organs of female Amur tigers from the age of six months to one and a half years.

Korotkov Evgeniy A., Lyubchenko Elena N., Korotkova Irina P., Zhilin Ruslan A., Kozhushko Aleksandr A., Kapralov Dmitriy V.

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