Waterfowl biologists need reliable predictors of brood and duckling survival to accurately estimate recruitment rates. We examined 30-day survival rates of gadwall (Anas strepera ) broods (1992-1994) and ducklings (1990-1994) in eastern North Dakota during years when water conditions ranged from extremely dry to extremely wet. Despite apparent resilience of gadwall populations during drought, our study documented a positive effect of seasonal wetland availability on gadwall duckling survival. Management efforts to improve recruitment will be more effective in years when most seasonal basins contain water.
Additional publication details
Factors affecting gadwall brood and duckling survival in prairie pothole landscapes