Aerial Breeding Pair Surveys of the Arctic Coastal Plain of Alaska : Distribution and Abundance 1995.

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description: An aerial breeding pair survey was conducted on the Arctic Coastal Plain of Alaska for the 10th consecutive year in 1995. The population estimate for the northern pintail (230,588) was 68% higher than in 1994. Estimates for scaup, yellow-billed loon, and pacific loon were up 18.8%, 24% and 35%, respectively. Greater white-fronted goose estimates were down 13% and oldsquaw and tundra swan estimates were comparable to 1994. No estimates were significantly different (P > 0.05) from 1994. We investigated trends in populations of 9 species with log-linear regression and examined the effectiveness of the survey with power analysis. Populations of 8 species were either stable or changing at a rate too low to detect. The yellow-billed loon population increased at an annual rate of 10% (P = 0.012, n = 9) from 1987 through 1995. With the current survey design we should be capable of detecting a 10% annual change in 6-11 years of surveys and a 5% annual change in 9-17 years depending upon the species. Density contour maps are presented for the common species and groups.; abstract: An aerial breeding pair survey was conducted on the Arctic Coastal Plain of Alaska for the 10th consecutive year in 1995. The population estimate for the northern pintail (230,588) was 68% higher than in 1994. Estimates for scaup, yellow-billed loon, and pacific loon were up 18.8%, 24% and 35%, respectively. Greater white-fronted goose estimates were down 13% and oldsquaw and tundra swan estimates were comparable to 1994. No estimates were significantly different (P > 0.05) from 1994. We investigated trends in populations of 9 species with log-linear regression and examined the effectiveness of the survey with power analysis. Populations of 8 species were either stable or changing at a rate too low to detect. The yellow-billed loon population increased at an annual rate of 10% (P = 0.012, n = 9) from 1987 through 1995. With the current survey design we should be capable of detecting a 10% annual change in 6-11 years of surveys and a 5% annual change in 9-17 years depending upon the species. Density contour maps are presented for the common species and groups.
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Title Aerial Breeding Pair Surveys of the Arctic Coastal Plain of Alaska : Distribution and Abundance 1995.
creation  Date   2018-05-11T22:32:34.187080
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Metadata data stamp:  2018-08-06T23:50:16Z
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