BREEDING CONDITIONS REPORT, 1994

RESPONDENT

Igor Popov

SITE NAME

Pyasina River mouth (Lidia Bay), Russia

Contact details (phone/fax//e-mail//address):
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PROJECT DETAILS

Project name:

Start of survey:

 End of survey: Team size:

WEATHER CONDITIONS
Season phenology: late

Weather conditions:
In the Pyasina Delta spring was very late. On 19 June more than 90% of tundra was still under snow, but then a sharp rise in temperature melted the snow within a week. Ice broke-up on 2-3 July and the warm weather lasted until 12 July. This was followed by a cold period (with temperatures mostly between 0ø-4øC and with strong winds but without precipitation) which lasted until mid-August.

 
Season temperature:
Season humidity:
Date of 50% snow-cover:
Date of ice-break on rivers:
Date of final loss of snow:

BIOTIC CONDITIONS
Rodents abundance evaluation:

high

Breeding conditions:
Arctic Fox numbers were thought to be average and similar to 1993. They occupied about half the dens and families had five to ten pups; therefore large numbers of foxes can be expected in 1995. Herring Gulls, Rough-legged Buzzards and Pomarine Skuas bred successfully as well as Snowy Owls (five broods were found within a 5 km radius). Birds started to breed late, but in most species reproduction was successful. Breeding in Little Stint, Curlew Sandpiper and Grey Plover was similar to 1993. There were probably fewer Pacific Golden Plovers Pluvialis fulva and Dotterels.
 

Rodent dynamics:
Average capture rate of Siberian and Collared Lemmings was 6.0 and 1.7 ind./100 trap-days (the largest in five years). Total lemming index was 10.0. Even distribution of animals (contrary to the peak period in 1991) ensured their successful reproduction.

Rodent species recorded:
LatinAbundance
Lemmus sibiricuscommon
Dicrostonyx torquatuscommon

Summary of fauna studies:

 

FAUNA IN THE STUDY AREA

Group of speciesPresenceAbundanceBreedingDetailed studiesComment
arctic foxesYescommonbreeding  
lemmingsYescommon   
wadersYes hatching  
buzzardsYes hatching  
pomarine skuasYes hatching  
gulls/ternsYes hatching  
owlsYes hatching  

 

SEABIRD COLONIES

speciesComment

 

WATERBIRD NON-BREEDING AGGREGATIONS

speciesAggregation typeNumberComment

 

HUMAN ACTIVITY IN THE STUDY AREA

Human activityComment

 

Source(s):

Spaans, B., Blijleven, H.J., Popov, I.U., Rykhlikova, M.E., Ebbinge, B.S. 1998. Dark-Bellied Brent Geese Branta-Bernicla-Bernicla Forgo Breeding When Arctic Foxes Alopex-Lagopus Are Present During Nest Initiation ARDEA 86: 11-20.
Tomkovich, P.S. 1998. Breeding conditions for waders in Russian tundras in 1994. International Wader Studies 10:132-144.

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 Last updated: 11 Dec. 2008  

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