Literaturdatenbank
Literaturdatenbank |
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Davenport, J., & Macedo, E. A. (1990). Behavioral osmotic control in the euryhaline diamondback terrapin malaclemys terrapin responses to low salinity and rainfall. Journal of Zoology, London, 220(3), 487–496.
Added by: Admin (24 Aug 2008 17:39:46 UTC) |
| Resource type: Journal Article BibTeX citation key: Davenport1990 View all bibliographic details  |
Categories: General Keywords: Emydidae, Malaclemys, Malaclemys terrapin, Physiologie = physiology, Schildkröten = turtles + tortoises, Verhalten = ethology Creators: Davenport, Macedo Collection: Journal of Zoology, London |
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| Abstract |
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Diamond terrapins, Malaclemys terrapin Latreille, inhabit salt marshes and estuaries where they may encounter sustained high salinities for weeks or months. Terrapins can discriminate between salinities. When salt-loaded they avoid drinking high salinities (27.2-34.0.permill.), drink small amounts of salinities which are a little more concentrated than the blood (13.6-20.permill.), and drink copious quantities of lower saliniites (0-10.2.permill.). After seven days in full sea water (34.permill.) they can rehydrate themselves in < 15 min if given access to fresh water. Terrapins are capable of drinking from the thinnest of freshwater films (1.6 mm), exploit menisci and have specific postural responses to collect small quantities of fresh water from horizontal and vertical surfaces. Specimens of Malaclemys terrapin respond to the vibration of simulated rainfall by rapid emergence followed by drinking from thin films, either on the exposed substratum or from the surface of the water column. Under simulated conditions of heavy rainfall they collect rain directly from above.
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