Changes in mallard breeding populations in relation to production and harvest rates
January 1, 1991
We used breeding population, band recovery, and hunter harvest data to examine whether rates of productivity and harvest correlated with annual changes in mallard (Anas platyrhynchos) breeding populations. Percent change in the size of the breeding population correlated positively with an index of production rate and negatively with an index of harvest rate (R2 = 0.37, F = 8.34, P < 0.005). Average harvest rate indices did not differ (W = 126, P < 0.32) between periods of increasing (1961-69) and decreasing (1970-85) populations. Indices to production tended to be lower (W = 143, P < 0.08) during 1970-85 (.hivin.x = 0.064) compared to 1961-69 (.hivin.x = 1.096).
Citation Information
Publication Year | 1991 |
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Title | Changes in mallard breeding populations in relation to production and harvest rates |
Authors | R. E. Reynolds, J.R. Sauer |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Journal of Wildlife Management |
Index ID | 5222972 |
Record Source | USGS Publications Warehouse |
USGS Organization | Patuxent Wildlife Research Center |