Abstract
The breeding, molting, and wintering ranges of the common eider (Somateria mollissima) were mapped and described in the southern part of the Barents Sea region, including the White Sea population in the western White Sea and the Murmansk population in the northwestern White Sea and the southeastern Barents Sea. The present-day abundance was determined for both populations: since the 1950s, it was the highest in the 2000s for the entire period of ornithological monitoring in the region. Aerial survey from a helicopter is considered to be the only reliable method for estimation of the total population number. The best season for surveying the White Sea population is March–early April (wintering); the most favorable period for surveying the Murmansk population is August (postbreeding/molting). The population status of the common eider in the northern and eastern parts of the Barents Sea has not yet been evaluated. On Franz-Josef Land, the common eider is distributed sporadically, and its number was assessed using expert estimates. The current abundance of the common eider on Novaya Zemlya is unknown. Helicopter-based aerial survey performed in late summer during the postbreeding season is the only relevant method to obtain reliable estimates for the population of the common eider inhabiting Franz-Josef Land and Novaya Zemlya.
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Original Russian Text © Yu.V. Krasnov, M.V. Gavrilo, A.A. Shavykin, 2015, published in Zoologicheskii Zhurnal, 2015, Vol. 94, No. 1, pp. 62–67.
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Krasnov, Y.V., Gavrilo, M.V. & Shavykin, A.A. Status, number, and monitoring of the common eider (Somateria mollissima) population in the barents sea and the White Sea. Biol Bull Russ Acad Sci 43, 664–669 (2016). https://doi.org/10.1134/S1062359016070098
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DOI: https://doi.org/10.1134/S1062359016070098