Analysis And Machine Mapping Of The Distribution Of Band Recoveries
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Analysis and Machine Mapping of the Distribution of Band Recoveries
A method of calculating distance and bearing from banding site recovery location based on the solution of a spherical triangle is presented. X and Y distances on an ordinate grid were appled 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 band and great circles at 30-degree intervals throug the point of bandng has certain advantages over other methods. Comparison of distributions by means of a chi square contengency test is illustrated. The statistic V = chi square/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.