Positive association in nesting mallard and teal: resource limitation and interspecific competition in the light of sensus data and a depletion experiment
2000 (English)Conference paper, Abstract (Refereed)
Wing-clipped mallards were introduced on breeding lakes before the arrival of teal to induce resource limitation and interspecific competition, hypothesized to reduce lake use by teal. Experimental lakes had 2.9-8.0 times higher pair density of mallards than controls, but there was no negative response by teal to the treatment. We believe this is the first combined observational-experimental demonstration of lack of interspecific competition in waterfowl. Our results indicate that heterospecific attraction may affect co-existence in dabbling ducks.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:hkr:diva-16150OAI: oai:DiVA.org:hkr-16150DiVA: diva2:1033335
Second North American Duck Symposium & Workshop, October 11-15, 2000, Saskatoon, Saskatchevan, Canada