Data from: An experimental test of state-behaviour feedbacks: gizzard mass and foraging behaviour in red knots



Animals frequently exhibit consistent among‐individual differences in behavioural and physiological traits that are inherently flexible. Why should individuals differ consistently in their expression of labile traits? Recently, positive feedbacks between state and behaviour have been proposed as a possible explanation for the maintenance of consistent among‐individual differences in both state and behaviour. If state affects behaviour, and behaviour reciprocally affects state, then differences in either state or behaviour that arise among individuals even by chance could be maintained over extended periods of time.
We tested for positive feedbacks experimentally using wild‐caught red knots (Calidris canutus islandica). In the wild, knots exhibit consistent among‐individual differences in digestive physiology (the mass of the muscular part of the stomach, the gizzard) and foraging behaviour (diet), two inherently labile traits.

The data package includes three worksheets: 1) gizzard mass data, 2) ad libitum foraging trial data, and 3) diet choice trials. Complete descriptions of all column headings are provided on the first tab of the excel file. For details of the methodology, please refer to the original publication in Functional Ecology.
Date made available19-Jan-2017
PublisherNetherlands Institute for Sea Research (NIOZ)
Temporal coverageJan-2015
Date of data productionJan-2015
Geographical coverageRichel, Wadden Sea, The Netherlands
Geospatial polygon53°16′57″N, 05°23′82″E

Keywords on Datasets

  • diet choice
  • digestive constraint
  • gizzard mass
  • physiological plasticity
  • state-dependent behaviour
  • foraging
  • Ecology
  • Experimental test
  • Hydrobia ulvae
  • Calidris canutus islandica

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