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Providing evidence to improve practice

Individual study: Use of artificial islands by nesting waterfowl in southeastern Alberta

Published source details

Giroux J.F.O. (1981) Use of artificial islands by nesting waterfowl in southeastern Alberta. The Journal of Wildlife Management, 45, 669-679

This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Provide artificial nesting sites for wildfowl using artificial/floating islands Bird Conservation

A replicated study at seven prairieland impoundments in Alberta, Canada (Giroux 1981), found that in 1976-8, 1,349 nests from 13 species of wildfowl were found on 75 artificial islands (75 islands searched in 1976-7 and 53 in 1978). Ducks (12 species) nested at densities of 1.8-29.1 nests/ha, with 43-59% success. Canada geese Branta canadensis nested at densities of 0.2-7.1 nests/ha, with 70% success (144 nests). Islands were most productive when small, far from shore and with high vegetation cover. Islands were created before flooding of the impoundments by raising some areas about to be flooded or isolating peninsulas with ditches and were between 0.13 ha and 6.6 ha in size.