Authors

D. M. Nickerson;A. Brunell

Comments

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Abbreviated Journal Title

Ecology

Keywords

adjusted means; Alligator mississippiensis; analysis of covariance; weighted least squares estimators; Ecology

Abstract

In some situations, survey counts must be adjusted for the effects of concomitant variables using analysis of covariance in order to detect a trend in abundance over time. A power analysis in these cases allows the calculation of the probability of detecting a trend after adjustments. The methods will be applicable to samples taken at regular or irregular intervals in time or space, and in which the effects of the concomitant variables do not change over time. Furthermore, the detection of linear and intrinsically linear change can be determined. The methods are applied to the monitoring of American alligator (Alligator mississippiensis) populations in Florida.

Journal Title

Ecology

Volume

79

Issue/Number

4

Publication Date

1-1-1998

Document Type

Article

Language

English

First Page

1442

Last Page

1447

WOS Identifier

WOS:000073841800025

ISSN

0012-9658

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