Literaturdatenbank
Literaturdatenbank |
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Hayes, F. E., Hayes, W. K., Beaman, K. R., & Harris, L. E. (1992). Sleep-like behaviour in the galápagos tortoise (geochelone elephantopus). Herpetological Journal, 2, 51–53.
Added by: Admin (23 Aug 2008 15:33:00 UTC) Last edited by: Beate Pfau (14 Sep 2008 12:47:31 UTC) |
| Resource type: Journal Article BibTeX citation key: Hayes1992 View all bibliographic details  |
Categories: General Keywords: Chelonoidis, Chelonoidis nigra, Schildkröten = turtles + tortoises, Testudinidae, Verhalten = ethology Creators: Beaman, Harris, Hayes, Hayes Collection: Herpetological Journal |
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| Abstract |
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Testudinidae Abstract.--Sleep-like behaviour of Galápagos Tortoises (Geochelone elephantopus) was studied at Volcán Alcedo, Isabela Island, Galápagos Islands, Ecuador. At midday, most tortoises found asleep were in the open with head and limbs extended; during cooler evening hours, sleeping tortoises usually occupied forms with head and limbs withdrawn. Variability in sleep-like postures during different periods of inactivity probably reflects alternative thermoregulatory strategies. Forms occupied by inactive tortoises (n = 53) comprised vegetation (51%), soil (30%) and other toritoises (19%). The absence of native predators on Galápagos implies a thermoregulatory rather than antipredator function for form use.
Added by: Admin Last edited by: Beate Pfau |