Features of the thyroid gland morphology of some representatives of the Cervidae family, living in the Altai

O.E Maltseva,O.G Gribanova,N.M Semenikhina,N.D Ovcharenko,I.N Pleshakova,S Knyazev,O Panfilova,O Loretts,M Tsoy,V Kukhar

doi:10.1051/e3sconf/202125409016

Abstract

The authors studied the morphofunctional (anatomical and histological) features of the thyroid gland of dapple deer, maral, moose and roe deer. During the macroscopic examination of the organ, the number of lobes, the presence of an isthmus, the length, width and thickness of the lobes, and the weight of the gland were determined. During histological examination, morphometric parameters were evaluated, such as: diameter of the follicles, height of the thyrocytes, volume of the thyrocyte nuclei, and the Brown index was calculated. In all animals, the thyroid gland consisted of two lobes without an isthmus. It differs between species in the shape, size, and thickness of the lobes. The gland weight correlates with the size of the animals. Morphological differences between species consist in the heterogeneity of the location of follicles of different diameters in relation to each other. In the dapple deer, large-diameter follicles are located in the center of the organ, and smaller-diameter follicles are located both in the center and on the periphery. In roe deer, the gland follicles are almost identical in shape and size, that is, they are of the same type. The gland has a similar morphological structure in maral and moose. The colloid of the follicles has a homogeneous consistency, it is compacted and intensively stained with hematoxyl-eosin, resorption vesicles are in small quantities.

Highlights

One of ecology tasks is to study the mechanisms of adaptation to changing environmental factors
The purpose of our research was to study the morphological features of the thyroid gland among the representatives of the Cervidae family living in the Altai, in particular in the maral, roe deer, moose and dapple deer
Analyzing the above, we can say that we have established the characteristic morphological features of the thyroid gland in maral, roe deer, moose, and dapple deer

Summary

Introduction

One of ecology tasks is to study the mechanisms of adaptation to changing environmental factors. In addition to the theoretical value of knowing the structural differences of mammalian organs of different species, it is essential to study the structure of wild and game animals. In the Altai fauna, six of the seven ungulate species that live on the territory of the Russian Federation are found in the wild: maral, reindeer, musk deer, moose, roe deer, and dapple deer [5]. The role of these species in nature is important and diverse. Moose, maral, and dapple deer are the main victims of secondary consumers, of which there are quite a few in these territories. Marals and dapple deer are specially bred in specialized farms to produce various products

Objectives

Results

Conclusion