Faecal densities as an index of goose use of an area.
Since 1985, the densities of faeces have been recorded weekly in permanent plots in the inter-tidal region of La Pérouse Bay for much of the season. This has provided a reliable index of goose use of specific areas of marsh. The use has changed over time as areas of salt marsh have become degraded. This technique will also be applied south of Cape Churchill and on the north shore of Akimiski Island where there are interactions between Canada and snow geese. With care, it is possible to distinguish the different faecal types of each species. Likewise, faeces of adults and goslings can be distinguished at least in the early post-hatch phase. These indirect assessments of use will be augmented by direct observational studies of brood rearing snow and Canada geese to explore causal mechanisms for any differential use by the species.
- revised 10/11/97 -