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Declines of Greater and Lesser Scaup Populations: Issues, Hypotheses, and Research Directions

Summary Of Issues


Following presentations on the issues discussed above, workshop participants generated a list of issues (not prioritized) to aid further discussions (Table 1). Participants grouped these issues into 4 main questions, similar to hypotheses outlined in Afton and Anderson (in review) for detailed discussion on how to direct future research and survey efforts:

  1. Has reproduction or survival of scaup changed sufficiently to cause population declines and, if so, what is the cause(s)?
  2. Have changes in the western Canadian boreal forest resulted in reduced reproductive success of scaup?
  3. Have physiological changes, including nutrient acquisition patterns and contaminants, affected reproductive success of scaup?
  4. What information is needed to manage greater and lesser scaup separately?

The sections below summarize the discussions and recommendations from each discussion group. Group leaders were R. Clark, B. Pollard, C. Custer, and J. Lawrence, respectively.

Table 1. List of issues generated from presentations and discussions during the Scaup Workshop.


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