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Description: |
ii, 26 pages : illustrations, map ; 26 cm. |
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Summary, Etc. Note: |
Abstract: Ten native species of pigeons and doves (Columbidae) occur in Puerto Rico and its offshore territories. Roadside counds of the columbids began in 1985 on the Puerto Rican mainland and in 1991 on Vieques Island. Coefficients of variances (CV) in spring were relatively lower than CVs in winter, summer, and fall. Sample-size estimates of the columbids from the roadside counts varied by species, spacial and temporal scales, sensitivity (power of a test of a hypothesis), and precision (width of a confidence interval). Guidelines for the standardization of roadside counts in Puerto Rico and on other Caribbean islands are given. |
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Bibliography Note: |
Includes bibliographical references (pages 24-26). |