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首页> 外文期刊>Biology bulletin >Breeding Biology of the Eurasian Dotterel (Eudromias morinellus) on the Putorana Plateau, Central Siberia
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Breeding Biology of the Eurasian Dotterel (Eudromias morinellus) on the Putorana Plateau, Central Siberia

机译：Breeding Biology of the Eurasian Dotterel (Eudromias morinellus) on the Putorana Plateau, Central Siberia

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Abstract Data on the biology and ecology of the Eurasian dotterel Eudromias morinellus from the largest mountain range of the Russian Arctic are presented. The data were obtained in the years 1988–2018. It has been established that, during the breeding season, the species covers a wide range of altitudes, settles on flat tops almost everywhere within the alpine belt, locally occurs in some parts of the subalpine belt, and is extremely rarely recorded in the mountain–taiga belt. Its range has a clearly defined three-dimensional character. Its optimal habitats in the alpine belt are confined to dry stony areas of the mountain tundra, which have a hummocky microrelief and are covered with sparse herbaceous vegetation. The abundance of the species during the breeding season varies from 0.4 to 10.0 (mean 1.7) individuals/km2 in optimal habitats within the alpine belt, gradually decreasing to both the tops (1.3 ind./km2) and foothills of slopes (3.5 ind./km2). Thus, 70 of all Eurasian dotterel individuals are concentrated in the central part of the alpine belt (which covers 42 of the vertical living space of this species) during the breeding period. Until the middle of the third ten-day of June, females actively lek in flight and on the ground both singly and in groups of up to 15 individuals. Egg laying begins on June 7–22, when the snow cover is often almost complete. Nests are at altitudes of 850–1036 (mean 935 ± 28) m a.s.l. (n = 8). The local nesting density, determined from the average minimum distance between neighboring nests, can be 1.67 nests/km2. The earliest estimated date of the appearance of chicks is July 3 and the latest date is July 18 (the average date is July 9 ± 1 day) (n = 13). Chicks of the same brood hatch within one day.

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