Methods: chapter 2

By: , and 
Edited by: Jonathan Bart and Victoria Johnston



Detecting declines in population size is one of the highest priorities of the shorebird initiatives in Canada and the United States. The quantitative goal is 80% power to detect a 50% decline, occurring during no more than 20 years, with a significance level of 0.15, using a two-tailed test, and incorporating effects of potential bias into the estimator. The Arctic PRISM program was designed to achieve this goal for arctic-nesting shorebird populations. The survey methods are an application of double sampling. Rapid surveys were made on a large number of plots selected from throughout arctic Alaska and Canada using stratified random sampling. Intensive surveys were made on a subsample of the plots to obtain detection rates, which were used to calibrate results from rapidly surveyed plots. Surveys will be made of the entire arctic region, each lasting several years and producing an estimate of average population size during the survey period. Results from two or more survey periods will be used to estimate change, or trend, in population size.

Additional publication details

Publication type Book chapter
Publication Subtype Book Chapter
Title Methods: chapter 2
Volume 44
Year Published 2012
Language English
Publisher University of California Press
Publisher location Berkeley, CA
Contributing office(s) Forest and Rangeland Ecosystem Science Center
Description 8 p.
Larger Work Type Book
Larger Work Subtype Monograph
Larger Work Title Arctic shorebirds in North America: a decade of monitoring
First page 9
Last page 16
Online Only (Y/N) N
Additional Online Files (Y/N) N