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Rayimov Avaz Rustamovich, assistant,
Uzbekistan, State University of Bukhara Rakhmonov Rashit Rakhimovich, assistant,
Uzbekistan, State University of Bukhara E-mail: fakhriddinh@mail.ru
THE DISTRIBUTION AND NUMBER OF ACRIDOTHERES TRISTIS IN DIFFERENT HABITATS IN THE KYZYLKUM REGION
Abstract. Different habitats, i.e anthropogenic elements in natural landscapes, agrocenoses, distribution of A. tristis in settlements, average number and their ecological factors are studied.
Keywords: agrocenosis, anthropogenic element, local migration, household waste.
The Acridotheres tristis is a synanthropic species in Uzbekistan, which is one of the dominant species in the Kizil-kum region ornithofauna. Many settlements in its populated areas were involved in various environmental pollution and competing with other species led to the use of firearms to control its number. However, the lack of adequate knowledge of the ecology, ethnology and significance of the jungle in local areas and the unilateral approach to solving the problem led to the inefficient conclusion of the event. In this regard, it is urgent to study the spread and the number of Acridotheres tristis in each ecosystem and to identify the factors that determine these indicators.
The following are the results of the study of the distribution of Acridotheres tristis, the number and the factors determining them in the case of the basic biotop in Kyzylkum.
1. Anthropogenic elements in the natural landscape. These elements include various structures of animal husbandry, forestry, hunting and water economy (buildings, wells, small woods, roads, bridges, pipes, electric drives). They have penetrated the natural landscape of the steppes and are located far away from settlements. The distribution of Acridotheres tristis in Kyzylkum is limited to anthropogenic elements. The main factor that ensures the appearance of Acridotheres tristis in such places is the existence of a network of premises and food sources.
An average annual number of Acridotheres tristis in anthropogenic elements of the natural landscape is 5.2(3-9) per 10 hectares (table). The highest indicator is in March-May (7-9), the lowest indicator falls in July-October (3-4) months. At the beginning of spring and early summer, the high number of abnormalities and abnormalities are explained by the increase in competition and the availability of adequate nutritional resources, while the number of other seasons can be explained by the availability of fruits that are easily acces-
sible to agrocenosis. Climate-related seasonal shifts can result in small migrations.
2. Agrocenoses. In the Kyzylkum region, agrocenoses occupy a large area. Considering their biodiversity conservation and the growing demand for ecologically clean crops, it is one of the pressing issues to study the faunistic composition of this biocenosis and to consider it as an experimental area.
In 2000-2010, 4 night colonies of Acridotheres tristis were registered in local orchards in Bukhara Region, and these colonies were not registered in the newly built intensive orchards. The number of fencing was also lower in the intensive gardens than in the gardens.
In the study, the average annual number of A. tristis, in cotton, winter wheat, berries, fruit gardens and vineyards, was determined (Table 1). In spring and summer, the number of Acridotheres tristis grown in these agrocenoses is higher than the other seasons of the year. The average annual yield was higher for bedbugs (19.8 per cent), and the lowest in winter wheat (9.9). The average monthly high indicator also showed the death tolls (37 mph) and the low figure to the cotton field (February 2).
3. Population points. Due to the relative convenience of habitats for high competitive, environmentally friendly and ecologically vulnerable Acridotheres tristis, there is a large number of households, especially for household waste its number increases. Here, along with the seasonal fluctuation of seasonal variations, there is daily change in winter in cities. Such dynamic vibrations depend on environmental factors, quantities of nutritional resources, location, and life cycles ofAcridotheres tristis. In the winter and early spring, resource depletion of A. tristis in the agrocenosis leads to an increase in the number of nutrition due to the fact that it is concentrated in settlements, industrial facilities and waste collection. During this time, they make "local migration" to comfortable living conditions. The total number of A. tristis in the waste dump has the highest average
Section 1. Biology
monthly indication (1308, January) and an annual number
(712) possesses high indicator (table 1).
To sum up, the distribution and number ofA. tristis in various habitats determine the seasonal changes in quality and quantity of nutrient resources, availability of sleeping and sleeping places,
seasonality of man's economic activity. The seasonal fluctuation of food resources will cause seasonal and daily "local migrations" ofA. tristis. Local migrations can be seen as an important stage in the life cycle of the A. tristis. This migration plays an important role in the biotopic redistribution and distribution ofA. tristis.
Table 1.- The average number of A. tristis in habitats and its annual dynamics (2012-2017)
Habitat Months, average number of hits (in 10 hectares) Average annual number (10 hectares)
I II III IV V VI VII VIII IX X XI XII
Anthropogenic elements in the natural landscape 5 6 8 7 9 6 3 3 4 3 5 4 5.2
Agroocenoses: Field ofcotton 3 2 7 12 14 17 24 18 16 14 6 3 11.3
The autumn wheat field 5 3 4 6 11 22 15 12 14 12 8 7 9.9
clover field 7 11 16 28 37 32 29 24 18 15 12 9 19.8
Fruit gardens and vineyards 5 8 14 17 11 7 13 16 21 18 10 4 12.0
Villages 27 34 42 49 54 68 74 82 60 56 43 30 51.6
Cities 30 26 21 35 40 49 32 27 18 21 24 33 29.7
Industrial production facilities 96 114 82 73 58 64 68 80 97 80 86 92 82.5
Floods 1308 1140 980 824 562 371 246 289 360 491 705 1273 712.4
Amusement parks and alleys 17 24 32 37 40 47 44 39 36 34 28 20 33.2
I II III IV V VI VII VIII IX X XI XII
Figure 2. Average monthly dynamics of number of population in settlements
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