GPS Based Daily Activity Patterns in European Red Deer and North American Elk (Cervus elaphus): Indication for a Weak Circadian Clock in Ungulates

• Erik P. Ensing,

  Affiliation Chronobiology Unit, Centre for Behaviour and Neurosciences, University of Groningen, Groningen, the Netherlands

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• Simone Ciuti,

  Affiliations Department of Biometry and Environmental System Analysis, University of Freiburg, Freiburg, Germany, Department of Biological Sciences, University of Alberta, Edmonton, Canada

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• Freek A. L. M. de Wijs,

  Affiliation Chronobiology Unit, Centre for Behaviour and Neurosciences, University of Groningen, Groningen, the Netherlands

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• Dennis H. Lentferink,

  Affiliation Chronobiology Unit, Centre for Behaviour and Neurosciences, University of Groningen, Groningen, the Netherlands

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• André ten Hoedt,

  Affiliation Natuurmonumenten, Eenheid Veluwezoom, Rheden, the Netherlands

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• Mark S. Boyce,

  Affiliation Department of Biological Sciences, University of Alberta, Edmonton, Canada

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• Roelof A. Hut

  * E-mail: r.a.hut@rug.nl

  Affiliation Chronobiology Unit, Centre for Behaviour and Neurosciences, University of Groningen, Groningen, the Netherlands

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