Analysis and machine mapping of the distribution of band recoveries
Special Scientific Report - Wildlife
198
By: L.M. Cowardin
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Abstract
A method of calculating distance and bearing from banding site to recovery location based on the solution of a spherical triangle is presented. X and Y distances on an ordinate grid were applied to computer plotting of recoveries on a map. The advantages and disadvantages of tables of recoveries by State or degree block, axial lines, and distance of recovery from banding site for presentation and comparison of the spatial distribution of band recoveries are discussed. A special web-shaped partition formed by concentric circles about the point of banding and great circles at 30-degree intervals through the point of banding has certain advantages over other methods. Comparison of distributions by means of a X? contingency test is illustrated. The statistic V = X?/N can be used as a measure of difference between two distributions of band recoveries and its possible use is illustrated as a measure of the degree of migrational homing.
Suggested Citation
Cowardin, L., 1977, Analysis and machine mapping of the distribution of band recoveries: Special Scientific Report - Wildlife 198, 8 pp.
| Publication type | Report |
|---|---|
| Publication Subtype | Federal Government Series |
| Title | Analysis and machine mapping of the distribution of band recoveries |
| Series title | Special Scientific Report - Wildlife |
| Series number | 198 |
| Year Published | 1977 |
| Language | English |
| Publisher | U.S. Fish and Wildlife Service |
| Publisher location | Washington, DC |
| Contributing office(s) | Northern Prairie Wildlife Research Center |
| Description | 8 pp. |
| First page | 0 |
| Last page | 8 |