Interspecific interactions and co-existence in dabbling ducks: observations and an experiment

  title={Interspecific interactions and co-existence in dabbling ducks: observations and an experiment},
  author={Johan Elmberg and Hannu P{\"o}ys{\"a} and Kjell Sj{\"o}berg and Petri Nummi},
We studied the possible role of resource limitation and interspecific competition in assemblages of dabbling ducks on breeding lakes in Finland and Sweden with observational and experimental data. After initial vegetation mapping and yearly censuses of ducks in 1985–1990, we collected observational data in 1991–1994 from 28 lakes with natural populations of mallard Anas platyrhynchos and teal A. crecca. Mallard and teal co-occur over vast areas in the Holarctic and they are the only breeding… CONTINUE READING

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