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Experimental functional response and inter-individual variation in foraging rate of teal (Anas crecca)
Kristianstad University, Department of Mathematics and Science.
Office National de la Chasse et de la Faune Sauvage, CNERA Avifaune Migratrice, La Tour du Valat, Le Sambuc, Arles.
Centre for Wildlife Ecology, Department of Biological Sciences, Simon Fraser University, Burnaby, BC.
Kristianstad University, Department of Mathematics and Science. (Akvatisk biologi och kemi)
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2007 (English)In: Behavioural Processes, ISSN 0376-6357, Vol. 75, no 1, 66-71 p.Article in journal (Refereed) Published
Abstract [en]

The functional response, i.e. the change in per capita food intake rate per time unit with changed food availability, is a widely used too] for understanding the ecology and behaviour of animals. However, waterfowl remain poorly explored in this context. In an aviary experiment we derived a functional response curve for teal (Anas crecca) foraging on rice (Oryza sativa) seeds. We found a linear relationship between intake rate and seed density, as expected for a filter-feeder. At high seed densities we found a threshold, above which intake rate still increased linearly but with a lower slope, possibly reflecting a switch from filter-feeding to a scooping foraging mode. The present study shows that food intake rate in teal is linearly related to food availability within the range of naturally occurring seed densities, a finding with major implications for management and conservation of wetland habitats.

Place, publisher, year, edition, pages
2007. Vol. 75, no 1, 66-71 p.
Keyword [en]
Anas crecca, aviary experiment, food intake rate, functional response
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:hkr:diva-202DOI: 10.1016/j.beproc.2007.01.001ISI: 000245884800008ISBN: 0376-6357 (print)OAI: oai:DiVA.org:hkr-202DiVA: diva2:173975
Available from: 2009-02-18 Created: 2009-02-11 Last updated: 2014-08-01Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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