Aggregative response of Harlequin Ducks to herring spawning in the Strait of Georgia , British Columbia

  title={Aggregative response of Harlequin Ducks to herring spawning in the Strait of Georgia , British Columbia},
  author={Michael S. Rodway and Heidi M. Regehr and John Ashley and Peter V. Clarkson and Rosalind Goudie and Douglas Edward Hay and Cyndi M. Smith and K. G. Wright},
We determined the scale of aggregative response of Harlequin Ducks (Histrionicus histrionicus) to seasonally and locally superabundant prey at Pacific herring (Clupea pallasi) spawning sites in the northern Strait of Georgia, British Columbia, in 1995–2002. Aggregations of 3400–5500 birds gathered at a small number of sites along the same 8-km stretch of shoreline each year that spawn was available there. Aggregations occurred in only a small fraction of the habitat area where spawn was… CONTINUE READING
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