Detection of Chrysops divaricatus (Diptera: Tabanidae) in flat pastures of the Central Yakutia Russian Federation

Abstract

Article history: Received: 8 July Received in revised form: 25 July Accepted: 28 July Available online: August (13,95%) and H. ciureai (13,84%) are mass, and numerous - H. nitidifrons (7,3%), H. distinguenda (3,88%), H. lurida (2,57%) and Chrysops nigripes (2.36%) making in the sum of 94,42%. However in Yakutia more than 30 years the studying of the fauna of horseflies was not almost engaged. The purpose of our researches is studying of specific structure of horseflies of the Central Yakutia of the Russian Federation. Materials and methods Research area: Yakutia is located in the north-east of Asia between 76 0 3'-55 0 29' north latitude and 105 0 3'- 162 0 51' east longitude (fig. 1). The area of Yakutia (3103, 2 thousand sq.km) occupies 18% or almost one-fifth of the Russian Federation territory. The area of research is in the territory of the Central Yakutia as a part of Russia. The western point is on border with Krasnoyarsk Krai (109°, 30' EL), east - on border with the Aldan River (135°, 30' EL), southern - on 60°C highway, northern - on 64°C north latitude. This is the area of the northern hemisphere cold pole which is characterized by wide temperature fluctuations. The January long-term mean air temperature in Oymyakon and Verkhoyansk is minus 49-50°C. In Oymyakon the temperature reaches minus 71°C, in Verkhoyansk minus 68°C and in the central regions the temperature is minus 66°C. The summer is short, but relatively hot (in most of republic the maximum temperature is plus 36-38°C), with a long sunshine duration (a continuous polar day). In 2003 in Yakutia the number of horses was 168,2 thousand, reindeers - 174,8 thousand and cattle - 234,4 thousand animals.