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Experimental functi...
Experimental functional response and inter-individual variation in foraging rate of teal (Anas crecca)
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- Arzel, Celiné (author)
- Kristianstad University
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- Guillemain, M. (author)
- Office national de la chasse et de la faune sauvage
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- Gurd, D.B. (author)
- Centre for Wildlife Ecology, Department of Biological Sciences, Simon Fraser University, Burnaby, BC,Centre for Wildlife Ecology, Department of Biological Sciences, Simon Fraser University, Burnaby, BC
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- Elmberg, Johan (author)
- Kristianstad University,Akvatisk biologi och kemi
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- Fritz, H. (author)
- Centre d'Etudes Biologiques de Chizé,Centre d’Études Biologiques de Chizé
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- Arnaud, A. (author)
- Tour du Valat,Centre de Recherche de la Tour du Valat, Arles
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- Pin, C. (author)
- Tour du Valat,Centre de Recherche de la Tour du Valat, Arles
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- Bosca, F. (author)
- Office national de la chasse et de la faune sauvage
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(creator_code:org_t)
- Elsevier, 2007
- 2007
- English 5
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In: Behavioural Processes. - : Elsevier. - 0376-6357 .- 1872-8308. ; 75:1, s. 66-71
- Related links:
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https://doi.org/10.1...
Abstract
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- 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.
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- ref (subject category)
- art (subject category)
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