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Estimation of annual indices from roadside surveys

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Estimation of annual indices from roadside surveys; 1990; Federal Government Series; Survey Designs and Statistical Methods for the Estimation of Avian Population Trends; Sauer, J.R.; Geissler, P.H.

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Most of the surveys presently used to estimate population trends on a large geographic scale depend upon repeated visits to a number of randomly selected routes or monitoring points. As these surveys cannot be analyzed by modeling annual mean densities among routes within a region, no natural annual index of population density exists for the region. We discuss two possible methodologies for estimating annual indices of abundance. In the context of the route-regression methodology, in which trends are estimated for each route and regional population trends are estimated as weighted averages of route trends, it is possible to find average residual distances between the predicted trends on each route and the actual data points. Adding [...]

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Type Scheme Key
local-index unknown 5210599
local-pk unknown 5210599
series unknown Biological Report

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citationTypeReport
journalBiological Report
languageEnglish
parts
typePublication Place
valueWashington, DC

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