Excerpt from Optimal Sampling for Radiotelemetry Studies of Spotted Owl Habitat and Home Range In 1986, we began a study of the relation between the spotted owl and its primary prey, the northern flying squirrel (glaucomys sabrinas). As part of that study, we conducted a pilot study of the behavior of the spotted owl as it relates to sampling designs for radiotelemetry and the characteristics of owl ranges as they relate to studies of foraging site selection by the spotted owl. The objective of this paper is to report the results of the pilot study. Four areas spanning the range of environmental conditions in the southern Coast Range were chosen for study: (1) Cherry Creek Research Natural Area is on the wet, west slope of the Coast Range; (2) Peterson point-lookout Mountain, near the South Fork Smith River northwest of Drain, Oregon, is an area with a mixture of naturally regenerated mature and old-growth forests, as well as managed forest; (3) the Miner Creek area is representative of the east slope of the Coast Range and is generally composed of a mixture of old-growth and managed forest; (4) the Riverview area is at the juncture of the east slope of the Coast Range and the Interior Valley Margin Province - an area composed of old-growth, managed forest, a large riparian area, oak woodlands, and grasslands (including hayfields and pastures). About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

A basic sampling scheme is proposed to estimate the proportion of sampled units (Spotted Owl Habitat Areas (SOHAs) or randomly sampled 1000-acre polygon areas (RSAs)) occupied by spotted owl pairs. A bias adjustment for the possibility of missing a pair given its presence on a SOHA or RSA is suggested. The sampling scheme is based on a fixed number of visits to a sample unit (a SOHA or RSA) in which the occupancy is to be determined. Once occupancy is determined, or the maximum number of visits is reached, the sampling is completed for that unit. The resulting data are summarized as a set of independent Bernoulli trials; a zero (no occupancy) or one (occupancy) is recorded for each unit. The occupancy proportion is the sum of these Bernoulli trials divided by the sample size. The bias adjustment estimates this occupancy proportion for the estimated number of units on which a pair of owls was present but not detected. The bias adjustment requires the recording of the number of the visit during which occupancy was first detected. The distributional assumptions are checked with five different sets of data.