Russian Journal of Ecology, Vol. 32, No. 2, 2001, pp. 135–137. Translated from Ekologiya, No. 2, 2001, pp. 152–154. Original Russian Text Copyright © 2001 by Ryzhanovskii. SHORT COMMUNICATIONS Evidence for the Existence of a High-Latitude White Wagtail (Motacilla alba) Population in the Yamal Peninsula and the Boundaries of Its Distribution V. N. Ryzhanovskii Ecological Station, Ural Division, Russian Academy of Sciences, ul. Zelenaya gorka 21, Labytnangi, 626520 Russia Received February, 25, 2000 Key words: Subarctic region, Motacilla alba, population, molt. In 2003, it will be 100 years since W. Johanssen In studying passerine birds of the polar and circum- published his book Über Eblichkeit in Population und polar regions, the analysis of mechanisms controlling in reinen Linien, in which the concept of population the postjuvenile molt is a promising approach. At tem- perate latitudes, the postjuvenile molt of many passe- was introduced for designating an aggregate of freely rine species is governed by the photoperiodic reaction: crossing individuals of the same species. At present, a the shortening of the daylight period in the second part population is regarded as a real panmictic evolving unit of summer accelerates the onset of molting, increases of the species, which has inhabited
Russian Journal of Ecology – Springer Journals
Published: Oct 9, 2004
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