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RESPONDENT
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Vadim Ryabitsev
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SITE NAME
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Yaibari River, Yamal, Russia
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| Contact details
(phone/fax//e-mail//address): |
| (343)-2-605-605/(343)-2-608-256 // riabits@etel.ru // Schorsa St., 30-32, Ekaterinburg, 620142, Russia
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PROJECT DETAILS |
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Start of survey:
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End
of survey: |
Team
size: |
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WEATHER
CONDITIONS
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Weather conditions: |
| Spring started a little earlier than usual. Tundra areas became mostly (80%) free from snow by 12 June and ice broke up on the river on 13 June. Summer was dry and rather warm, without sharp decreases of temperature.
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| Date of ice-break on
rivers: |
13.06
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| Date of final loss of
snow: |
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BIOTIC
CONDITIONS
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| Rodents abundance evaluation: |
low
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Breeding conditions:
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| Arctic Foxes and other terrestrial predators were almost absent; the usual numbers of Parasitic and Long-tailed Skuas bred, while Pomarine Skuas Stercorarius pomarinus were scarce. Owls were absent; Rough-legged Buzzards were more common than usual at the start of the breeding season, but the majority of pairs then abandoned their nests. There were average wader densities on survey plots. Surprisingly high numbers of Curlew Sandpiper Calidris ferruginea were recorded - c. 6 nests per km2, and for the first time in northern Yamal breeding Pectoral Sandpiper Calidris melanotos was recorded. Breeding of waders was rather successful: chicks hatched in 95 of 113 nests under observation (84%). Incubation success calculated according to Mayfield-Paevsky method (n=125 nests) was 72%. Conditions for growth of chicks were favourable and many of them fledged successfully.
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Rodent dynamics:
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| Lemmings were few, their populations had only just started to increase.
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Rodent species recorded:
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Summary
of fauna studies: |
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