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2016•Antarctica A Keystone in a Changing WorldOpen access

Mountain goat abundance and population trends in the Olympic Mountains, northwestern Washington, 2016

Kurt J. Jenkins, Patricia J. Happe, Katherine F. Beirne, William T. Baccus

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Abstract

in the Olympic Mountains increased at an average finite rate of 6 percent annually from 2004 to 2011, 11 percent annually from 2011 to 2016, and 8 percent annually over the combined period.We caution that the population may have been underestimated in 2011 because of record heavy snows persisting into the survey season.Therefore, the rate of population increase from 2011 and 2016 may be overestimated.The rate of increase measured over the combined period (2004-16) may be more representative of the recent population growth.We conclude that the abundance of mountain goats has increased for more than a decade, and if the recent average rate of population growth were sustained, the population would increase by 45 percent over the next 5 years.

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in the Olympic Mountains increased at an average finite rate of 6 percent annually from 2004 to 2011, 11 percent annually from 2011 to 2016, and 8 percent annually over the combined period.We caution that the population may have been underestimated in 2011 because of record heavy snows persisting into the survey season.Therefore, the rate of population increase from 2011 and 2016 may be overestimated.The rate of increase measured over the combined period (2004-16) may be more representative of the recent population growth.We conclude that the abundance of mountain goats has increased for more than a decade, and if the recent average rate of population growth were sustained, the population would increase by 45 percent over the next 5 years.

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Available abstract

in the Olympic Mountains increased at an average finite rate of 6 percent annually from 2004 to 2011, 11 percent annually from 2011 to 2016, and 8 percent annually over the combined period.We caution that the population may have been underestimated in 2011 because of record heavy snows persisting into the survey season.Therefore, the rate of population increase from 2011 and 2016 may be overestimated.The rate of increase measured over the combined period (2004-16) may be more representative of the recent population growth.We conclude that the abundance of mountain goats has increased for more than a decade, and if the recent average rate of population growth were sustained, the population would increase by 45 percent over the next 5 years.

Key concepts: National park, Geography, Aerial survey, Wildlife, Population, Geological survey, Survey methodology, Forestry

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