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Lambert, M. R. K. (1981). Temperature, activity and field sighting in the mediterranean spur-thighed or common garden tortoise testudo graeca l. Biological Conservation, 21(1), 39–54.
Added by: Admin (24 Aug 2008 18:49:48 UTC) Last edited by: Beate Pfau (10 Jul 2009 11:59:58 UTC) |
| Resource type: Journal Article BibTeX citation key: Lambert1981a View all bibliographic details  |
Categories: General Keywords: Habitat = habitat, Nordafrika = Northern Africa, Schildkröten = turtles + tortoises, Testudinidae, Testudo, Testudo graeca Creators: Lambert Collection: Biological Conservation |
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| Abstract |
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Testudo graeca Daylight observation on NW African and W Turkish populations of the Mediterranean spur-thighed tortoise Testudo graeca L. showed that activity, depending upon maturity, sex and size, is influenced by air temperature and sunshine. Tortoises are active above 18 degree C while refuge from sunshine during the middle of the day occurs above 28 degree C. Morning basking increases body temperature, which under glass in S England was shown to be thermoregulated at about 35 degree C. With movements in and out of sunshine, most heat is dissipated through the plastron. Field sighting frequency (no. man-h1 ) as a relative index of abundance in low density populations is influenced by activity and behavior type. This is discussed with regard to tortoise detection being increased by locomotory rustling and mating sounds in thick vegetation. Added by: Admin Last edited by: Beate Pfau |