YFNWR project report number 87-5: Beaver food cache survey, Yukon Flats National Wildlife Refuge, Alaska, 1986: Management study
Published By US Fish and Wildlife Service, Department of the Interior
Issued almost 10 years ago
US
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Summary
Description
Beaver colonies remained relatively stable or increased slightly within the two survey areas as indicated through aerial foodcache surveys. The LodgeWater Bodies ratio increased for the two areas by 23 over 1985. The increase is reflected in the increase in newly located lodges 15. There was a 10 decrease in the Food Cache ActivityLodge ratio indicating not as many available lodges were occupied. There was a net gain of eight active lodges indicating a relatively stable or slight increase in beaver population reflected through beaver colony activity.