Nesting and duckling ecology of white-winged scoters (Melanitta fusca deglandi) at Redberry Lake, Saskatchewan / Joshua James Traylor
Material type:
TextPublication details: Saskatoon, SK: University of Saskatchewan, 2003.Description: ix, 76 leaves : ill. ; 28 cmSubject(s): Online resources: Abstract: Population surveys indicate a declining trend in abundance for the scoter genus at the continental level. Little is known about changes in life history traits responsible for the recent population decline of white-winged scoters (Melanitta fusca deglandi, hereafter scoters).Therefore, I studied nesting and duckling ecology of scoters at Redberry Lake, Saskatchewan, Canada during summers 2000-2001 when I found 198 nests. To examine nest-site selection, I compared habitat features between successful nests, failed nests, and random sites. Discriminant function analysis differentiated habitat features, measured at hatch,between successful nests, failed nests, and random sites; lateral (r=0.65) and overhead (r=0.35) concealment were microhabitat variables most correlated with canonical discriminant functions. I also modeled daily survival rate (DSR) of nests as a function of year, linear and quadratic trends with nest age, nest initiation date, and seven microhabitat variables. Nes survi
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Thesis(MSc)--University of Saskatchewan, 2003.
Population surveys indicate a declining trend in abundance for the scoter genus at the continental level. Little is known about changes in life history traits responsible for the recent population decline of white-winged scoters (Melanitta fusca deglandi, hereafter scoters).Therefore, I studied nesting and duckling ecology of scoters at Redberry Lake, Saskatchewan, Canada during summers 2000-2001 when I found 198 nests. To examine nest-site selection, I compared habitat features between successful nests, failed nests, and random sites. Discriminant function analysis differentiated habitat features, measured at hatch,between successful nests, failed nests, and random sites; lateral (r=0.65) and overhead (r=0.35) concealment were microhabitat variables most correlated with canonical discriminant functions. I also modeled daily survival rate (DSR) of nests as a function of year, linear and quadratic trends with nest age, nest initiation date, and seven microhabitat variables. Nes survi