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1 May 2009 Foraging Behavior and Diet Preferences of a Released Population of Giant Tortoises in the Seychelles
John W. Pemberton, Jason S. Gilchrist
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This study evaluates the potential impacts of the release of the giant tortoise, Dipsochelys arnoldi, to vacant habitat within the species' presumed historic range. Five individuals (3 males and 2 females) were released in December 2006 in the isolated Grande Barbe area of Silhouette Island, Seychelles. A comprehensive vegetation survey of all plant species within feeding height of the tortoises in Grande Barbe was conducted. These data, combined with daily feeding observations, were used to calculate feeding rates and diet preferences. Tortoises were observed to have a mean diurnal active time of 257 minutes per day exhibiting a mean feeding rate of 3.86 g of plant material consumed per minute of active time. Individuals were recorded feeding on 18 of 26 recorded plant species, 9 of which were selectively foraged. Species composition of plant species ingested differed between sexes. Males selectively foraged on 6 plant species and females selectively foraged on 7 species. Only 2 plant species were selectively foraged by both sexes.

John W. Pemberton and Jason S. Gilchrist "Foraging Behavior and Diet Preferences of a Released Population of Giant Tortoises in the Seychelles," Chelonian Conservation and Biology 8(1), 57-65, (1 May 2009).
Received: 5 February 2008; Accepted: 1 February 2009; Published: 1 May 2009
captive breeding
diet preferences
Dipsochelys arnoldi
ecosystem dynamics
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