Literaturdatenbank
Literaturdatenbank |
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Crawford, K. M., Spotila, J. R., & Standora, E. A. (1983). Operative environmental temperatures and basking behavior of the turtle pseudemys scripta. Ecology, 64(5), 989–999.
Added by: Admin (24 Aug 2008 18:46:15 UTC) Last edited by: Beate Pfau (05 Jul 2009 08:51:42 UTC) |
| Resource type: Journal Article DOI: 10.2307/1937806 BibTeX citation key: Crawford1983a View all bibliographic details  |
Categories: General Keywords: Emydidae, Habitat = habitat, Nordamerika = North America, Physiologie = physiology, Schildkröten = turtles + tortoises, Trachemys, Trachemys scripta Creators: Crawford, Spotila, Standora Collection: Ecology |
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| Abstract |
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Trachemys scripta Operative environmental temperatures (Te, an index of the thermal environment) were measured for basking Pseudemys scripta in South Carolina. Operative environmental temperatures were good predictors of the basking behavior of P. scripta. Turtles in this study generally did not bask unless Te was 28°C (preferred body temperature) or higher. This demonstrated that basking was not a random behavior in respect to Te, and implicated thermoregulation as a major factor eliciting basking behavior. Operative environmental temperature was positively related to short—wave and total solar radition as well as to air and substrate temperature. Substrate temperature was the best single predictor of Te. A multiple regression equation (Te = 0.005R + 0.103Ta — 1.16 log V + 0.932Ts — 2.54, r2 = .90, where R = total radiation in watts per square metre, Ta = air temperature in degrees Celsius, V = wind speed in metres per second, and Ts = substrate temperature in degrees Celsius) defines the relationship of Te to microclimate variables. Movement of the sun through the day results in spatial variation in Te's available to turtles and influences their location and basking behavior. Added by: Admin Last edited by: Beate Pfau |