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RESPONDENT
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Sergei Rupasov
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SITE NAME
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Yarayakha River mouth and adjacent coastline of Baidaratskaya Bay, Russia
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| Contact details
(phone/fax//e-mail//address): |
| 8(495)146-97-47 // sergei_rupasov@mail.ru // Rubleuvskoe Shosse 11-8, Moscow, 121108, Russia
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PROJECT DETAILS |
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Project name:
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Bird fauna of Baidaratskaya Bay coast-line
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Start of survey:
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End
of survey: |
Team
size: |
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1.08
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10.08
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1
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WEATHER
CONDITIONS
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| Season phenology: |
average
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Weather conditions: |
| Relatively dry and moderately warm weather that prevailed in July favoured successful hatching and development of chicks. Cold and rainy weather established in late July and prevailed during the study period on 1-10 August, with a few sunny, relatively warm days. However, breeding success of birds was not probably affected strongly by this fall in temperatures.
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| Date of ice-break on
rivers: |
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| Date of final loss of
snow: |
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BIOTIC
CONDITIONS
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| Rodents abundance evaluation: |
average
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Breeding conditions:
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Arctic Foxes were common and bred. Their predation pressure on birds should have been considerable, given that rodent populations had just started to increase. Rough-legged Buzzards, Peregrine Falcons and Arctic Skuas occurred in average numbers and nested, while Herring Gulls were numerous breeders. At least two alarming pairs of Pomarine Skuas were recorded in a range of 10 km from the field station.
We observed broods of Red-throated and Black-throated divers, King Eiders, Long-tailed Ducks, Willow Grouse, Grey Plovers, Eurasian and Pacific Golden plovers, Ringed Plovers, Red-necked Phalaropes, Little and Temminck's stints, Shorelarks, White Wagtails, Meadow and Red-throated pipits, Wheatears, Lapland and Little buntings, and Common Redpolls.
Breeding conditions were probably moderately favourable for most species of birds in this season.
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Rodent dynamics:
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| Lemming numbers were probably low to moderate in the beginning of the season, and they increased considerably in the second half of summer. Lemmings were observed several times each day on excursions, and were captured by a dog in August. Collared Lemmings were less abundant than Siberian Lemmings. Juvenile lemmings prevailed among recorded animals, and their proportion was increasing notably even during the short period of studies. Voles were not observed.
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Rodent species recorded:
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| Latin | Abundance |
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| Lemmus sibiricus | common |
| Dicrostonyx torquatus | common |
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Summary
of fauna studies: |
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