Sources of variation in waterfowl nest predation / Karla Lee Guyn.
Material type:
TextSeries: Thesis ; (M.Sc.)Publication details: Saskatoon, SK : University of Saskatchewan, 1994.Description: xiii, 105 p. : ill. ; map ; 28 cmOnline resources: Abstract: Nest loss is an important factor reducing the reproductive success of ground-nesting birds. However, it is unclear why certain nests hatch whereas others are destroyed by predators. Consequently, I performed experiments with conditioned taste aversion and measured characteristics of natural and simulated duck nests to evaluate clutch survival in relation to: i) avian and mammalian predation; ii) nest location (site,habitat, distance to edges); iii) time; iv) spatial dispersion of nests;and v) vegetative characteristics around nests. Previous studies have examined the efficacy of conditioned taste aversion (CTA) in reducing egg predation at site baited with eggs, but not at natural nests.Therefore, I evaluated whether CTA might be generalized, protecting eggs in natural nests of ducks in southcentral Saskatchewan. Consumption of eggs was monitored at baiting sites placed near nests of American crows and in locations likely to be frequented by mammals. During the treatment period, eg
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Includes bibliographical references (p. 87-101).
Nest loss is an important factor reducing the reproductive success of ground-nesting birds. However, it is unclear why certain nests hatch whereas others are destroyed by predators. Consequently, I performed experiments with conditioned taste aversion and measured characteristics of natural and simulated duck nests to evaluate clutch survival in relation to: i) avian and mammalian predation; ii) nest location (site,habitat, distance to edges); iii) time; iv) spatial dispersion of nests;and v) vegetative characteristics around nests. Previous studies have examined the efficacy of conditioned taste aversion (CTA) in reducing egg predation at site baited with eggs, but not at natural nests.Therefore, I evaluated whether CTA might be generalized, protecting eggs in natural nests of ducks in southcentral Saskatchewan. Consumption of eggs was monitored at baiting sites placed near nests of American crows and in locations likely to be frequented by mammals. During the treatment period, eg