Published By US Fish and Wildlife Service, Department of the Interior
Issued más de 9 años ago
US
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Summary
Description
Each summer from 1977 through 1980, the Special Studies section of the U.S. Fish and Wildlife Service conducted investigations of bird populations and habitat used by waterbirds in the large lake reg1.me north and east of Teshekpuk Lake, Naval Petroleum ReserveAlaska NPRA Derksen et al. 1979; Taylor et al.1980. During the 1980 field season, emphasis in the investigation shifted from systematic gathering of data on all bird species to concentrated studies of black brant Branta bernicla nigricans and oldsquaw ducks Clangula hyemalis.