Body mass changes in waders (Charadrii) in a High Arctic area at Northern Taimyr, Siberia

Soloviev, M.Y.; Tomkovich, P.S.

Авторы: Soloviev M.Y., Tomkovich P.S.
Журнал: Journal of Ornithology
Том: 138
Год издания: 1997
Издательство: Blackwell-Wiss.-Verl
Местоположение издательства: Germany
Первая страница: 271
Последняя страница: 281
Аннотация: Body mass data were collected for 5 species of tundra waders during 6 breeding seasons to study variation in nutrient reserves relative to high arctic climatic conditions and the stage of reproduction. Structural size was accounted for by the 1st Principal Component of external linear measurements: wing length, bill length and tarsus length. Sandpipers Calidris spp. were on average lighter in phenologically late seasons, while mass of Turnstones (Arenaria interpret) was similar in all years. Mass of waders was lower during brood-rearing than during incubation. Body mass during pre-nesting was most variable between years, reflecting the unpredictable weather conditions in this period. Monogamous species (Knots Calidris canutus and Turnstones) began to breed earlier, and were on average, as heavy during the pre-nesting period as during incubation. In contrast, species with a proven or suspected rapid doubleclutch breeding system (Little Stints C. minuta and Sanderlings C. alba) began to breed later and had during the laying period masses close to those of adults attending broods, and lower than during incubation. Body mass of the two latter species and Curlew Sandpipers (Calidris ferruginea) varied during incubation, reaching peak at 7 to 13 days after clutch completion.
Добавил в систему: Томкович Павел Станиславович

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Body mass changes in waders (Charadrii) in a High Arctic area at Northern Taimyr, Siberiaстатья

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