Analysis disease gastral system wild animals in zoo

Abstract

The article presents the results of studies of the microelement composition of wild birds' feathers kept in the conditions of the Moscow Zoo. The aim of the study was to study the content of some heavy metals and arsenic in representatives of the Cranes family - Gruidae (Red-crowned crane - Grus japonensis, Blue crane - Anthropoides paradiseus, East African grey-crowned crane -Balearica regulorum gibbericeps, and White-naped crane - Grus vipio) and to develop centile scales for assessing the health of birds. In 2018 - 2020, studies of crane feathers were carried out for the accumulation of zinc, copper, iron, lead, cadmium and arsenic by the atomic absorption method. The data on the features of the content of chemical elements in different species of animals are presented. In the course of the study, it was found that, according to the value of the average content in the feathers of birds of the Cranes family, the studied elements form the following decreasing series: Fe> Zn> Cu> Pb> Cd> As. In the cranes kept in the Moscow Zoo, there is a tendency to a decrease in zinc and arsenic in 25.0% and 37.5%, respectively, an increase in lead, cadmium and arsenic in 25.0% of individuals. 50% of the studied birds by the level of arsenic in their feathers, 25% by zinc, copper, iron and lead, 12.5% by cadmium are in a state of "predisease" and require additional examinations. In the fan of cranes, a significant increase in the concentration of zinc and lead in the grooves was established, compared with the core, by 3.6 and 4.4 times, respectively. A significant average direct relationship was revealed between the level of Zn and Pb, Cu and Fe, Cu and As and an inverse average relationship between the level of Zn and As in bird feathers. To improve the microelement status of cranes of zoological institutions, it is necessary to conduct monitoring studies with a frequency of 1 time in half a year with an assessment of the level of chemical elements on centile scales.