In the article are considered issues related to the study of the effect of cadmium on the body of birds, in particular laying hens. The effect of cadmium sulfate at doses of 2.0 and 4.0 mg/kg body weight on protein synthesis function and functional state of the liver were investigated of cross-laying Hysex white hens, of 78 weeks old. Three groups of chickens were formed: two experimental and one control groups. The laying hens of the experimental groups were subjected to a cadmium load. Laying chickens of the first experimental group were given cadmium sulfate at a dose of 2.0 mg/kg body weight. Laying chickens of the second experimental group were given cadmium sulfate at a dose of 4.0 mg/kg body weight. Laying chickens in the control group were in the normal diet without cadmium. Increased activity of aminotransferases, in particular alanine and aspartate aminotransferases in their serum of hens, was observed during cadmium binge drinking in doses of 2.0 and 4.0 mg/kg body weight, respectively. These changes indicate a violation of the functional state of the liver of laying hens under conditions of cadmium load. In the study of protein synthesis of the liver of laying hens under conditions of cadmium loading, it was found that cadmium sulfate in the above doses contributed to a significant decrease in the level of total protein by 14, 21 and 30 days of the experiment. The reduction of total protein in the blood of laying hens was due to a decrease in the level of albumin, which in the second experimental group, respectively, decreased to 28.16 ± 0.75%, whereas in the first – 29.62 ± 0.98%. In the study of the level of globulins, it is possible to increase this indicator in both experimental groups of poultry for 21 days. Drinking with water cadmium sulfate at a dose of 4.0 mg/kg body weight was associated with a more likely decrease in total protein and albumin than drinking cadmium sulfate at a lower dose.

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The paper present result of research on the ecological analysis of faunal complexes of the Western region of Ukraine. The animal world of this region is distinct from the other zones. The variety of the landscape determines the variety of the animal world. Ukrainian Carpathians are one of the last area in continental Europe to support viable populations of large carnivores. Established that the endemic to the Western region of Ukraine are carpathian squirrel, carpathian newt, spotted salamander, golden eagle. The most rare animals are: bison, brown bear, lynx, golden eagle, white-tailed eagle, common muskrat, european gopher, forest cat. The Brown bear population in the Ukrainian Carpathian reach approximately 150–200 individuals. The lynx population is officially estimated to be about 350–400 individuals. In Ukraine there are about 300 species of bison. Only  33 nimals left in Ukrainian Skolivsky Beskydy. We can also find noble deer, roe, wolf, moose, hare, squirrel, wild cats and pigs, hamster, field mouse and so on. Some fur animals (nutria, mink, silvery-black fox, muskrat, stone marten, badger) were brought in from afar, and they acclimatized themselves well to the environment. The diverse habitats in the Carpathians support a wide variety of bird species, using the region for nesting, migrating and wintering. Overall, more than 300 species are found in the Zakarpattia. Bird life includes golden eagles and black wood peckers, carrion eagle, black griffons, white-tailed eagle, sparrow, titmouse, owls, gulls, partridge. The golden eagle nests in all the major mountains of Europe, in the Ukrainian Carpathians – 10–15 pairs. The rivers and lakes are home to ducks, geese, storks, swans and cranes. Rivers, lakes and manmade reservoirs of the Western region of Ukraine are inhabited with perch, bream, zander, pike, crucian carp, sazan, carp, sturgeon, trout. Among reptiles, one can come upon vipers, grass-snakes, and lizards. The spotted salamander and three types of tritons are entered in the Red Book. It was found that the most Red species are in Zakarpattia (168) and the least – in Rivne (85 species). The main factors of influence on the biodiversity of the Western region of Ukrain are identified. It is shown that poaching, anthropogenic and recreational activities have the most influence on faunal complex studied region.

The article presents the results of research on environmental, energy and economic efficiency of the use of alternative energy sources to provide heat to buildings located on the territory of nature reserves. Spending of time on the territory of the nature reserve fund gives the chance of various kinds of rest: use of bicycle routes, ecological paths, the organized places of recreation, etc. Therefore, in specially designated areas complexes are built for vacationers. They provide them with a comfortable stay and the opportunity to get the most out of the chosen type of recreation. Electricity networks are most often used to provide buildings with electric power on the territory of nature reserve facilities. However, this has a significant negative impact on the environment. Many of these facilities are located at a great distance from the settlements, that increases the cost of electrification and gasification. Such facilities require large investments in hot water and heat. Therefore, alternative energy sources are suitable for such cases. The main advantage of using solar panels and heat pump is their environmental friendliness and long period of operation without major repairs. It is established that for the installation of vertical probes it is enough to use four branches 106 m long. For this combined system it is necessary to install six solar collectors, which will provide monthly heat production in the amount of 514.03 MJ. The use of solar collectors and a heat pump to provide heat to the visitor center will reduce the annual operating costs by 4.63 times compared to the costs required for the operation of a system that would operate on the basis of a gas boiler. The use of a combined heat supply system will make it possible to abandon the use of 7156.3 kg of conventional fuel and as a result will reduce carbon dioxide emissions in the amount of 7871.9 kg. Our country is interested in the use of renewable energy sources by reducing the cost of traditional energy sources, the overall reduction of greenhouse gas emissions during combustion. The state receives direct income from the sale of quotas for harmful emissions.