|Central coordinates||67o 49.52' East 40o 50.93' North|
|IBA criteria||A1, A4i|
|Altitude||246 - 268m|
|Year of IBA assessment||2006|
Ornithological information Currently no comprehensive data on the ornithofauna of this area exists. The list of birds of the adjacent territory includes about 230 species. Surveys carried out in spring 1998, summer 2004 and summer-autumn 2006 recorded 80 species. Of these, four are included on the IUCN Red List (Pelecanus crispus, Aythya nyroca, Aegypius monachus and Coracias garrulus) and 10 species are included on the national Red Data Book, namely, Pelecanus onocrotalus, Pelecanus crispus, Phalacrocorax рygmaeus, Plegadis falcinellus, Platalea leucorodia, Cygnus olor, Aythya nyroca, Aquila nipalensis, Aquila chrysaetos and Haliaeetus albicilla. A flock of Otis tarda (five individuals) was recorded by inspectors of the Aidar-Arnasai Basin Inspectorate in this area in 2004. Hunters noted that Branta ruficollis and Anser erythropus were among the species shot in a number of years.
Site description This site is situated 45 km to the SW of the district center Gagarin. It includes Arnasay water reservoir, adjusting lakes and part of the sandy desert. The length of the reservoir is about 70 km, width up to 7-12 km, average depth 5-7 m., and has a gently sloping shore. The shoreline is indented by long shore bays sometimes with thin strips of reed. The isolated lakes are surrounded by tugay forest and have extensive cover of reeds (up to 60-70%). The lakes tend to freeze (December/January to March) but not every year.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Ferruginous Duck Aythya nyroca||breeding||1998-2006||3-43 adults only||medium||A1||Near Threatened|
|Common Crane Grus grus||passage||2004-2006||100-816 adults only||good||A4i||Least Concern|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Land-use||Extent (% of site)|
|Notes: The lands situated in the direct proximity to the water body are used only as pastures for cattle. The entire year this water body is used as the drinking pond for small cattle|
|Notes: It is also used for fisheries.|
|Notes: In autumn-winter it is used as the range for hunting|
|Notes: The lakes, as well as the reservoir, are heavily affected due to the withdrawal of water resources for agriculture|
Other biodiversity Animals are represented by typical species of the desert and waterside: gerbils, Long-clawed Ground Squirrel, jebroas, Fox (ssp. caragana), Corsac Fox, Steppe Cat, Wild Boar and Badger. An increase in the numbers of jackal and introduced muskrat has been noted in the last few years. Desert Monitor and Steppe tortoises, Phrynocephalus interscapularis and other lizards are common. Dice Snake, Marsh Frog and Green Toad are also recorded. Water bodies are inhabited by sazan, Pike-perch, Catfish, Roach, introduced Channa argus and Silver Carp. The coasts and islets of Arnasay reservoir and adjoining lakes are covered with desert species such as Haloxylon persicum, Populus ariana, P. proinosa, Alhagi psendalhagi, Ammodendron argentum, Astragalus amarus and Ferula caspica, and tree-shrub plants and grasses. Phragmites communis and Typha angustifolia grow along the shoreline; Potomogeton lucens, P. pectinatus, Myriophyllum spicatum, Ceratophyllum demersum etc. grow in the water.
Management considerations Uncontrolled fishing leads to the impoverishment of the food supplies of fish-eating birds. The use of fixed nets is dangerous for many species. The constant presence of boats and humans on the lake is a disturbance factor for birds. The degradation of the sandy desert results in the extent of habitat, while poaching represents a direct threat for birds.
Conservation response In 2004, an international winter count of water birds was conducted in this territory within the framework of the WWF-Russia and Wetlands International project “The development of a strategy on the protection of water birds and wetlands in the Central Asian migratory flyway”.
References Atadjanov, A., Filatov, A., Lanovenko, Y., Zagrebin, S., Chernogaev, E., Khodjaev, J. Aerial Survey of Wetlands in Uzbekistan (winter 2000). Report of the project RSGF "Protection of Uzbekistan's Wetlands and their Waterfowl". Part 3. Tashkent, June 2001. IWC National Data Base (2003-2005) Wetland International IWC Data Base (2003-2004)
Contribute Please click here to help BirdLife conserve the world's birds - your data for this IBA and others are vital for helping protect the environment.
Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Aranasay Lake System. Downloaded from http://www.birdlife.org on 19/06/2013
To provide new information to update this factsheet or to correct any errors, please email BirdLife