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Journal Article

Hyperosmotic Saline Environment Alters Feeding Behavior in the Western Toad, Bufo boreas

Jim W. Dole, Betty B. Rose and Claude F. Baxter
Copeia
Vol. 1985, No. 3 (Aug. 5, 1985), pp. 645-648
DOI: 10.2307/1444756
Stable URL: http://www.jstor.org/stable/1444756
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Hyperosmotic Saline Environment Alters Feeding Behavior in the Western Toad, Bufo boreas
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Abstract

Exposure of western toads, Bufo boreas, to 344, 372 or 400 mOs solutions of NaCl is accompanied by a decrease in the accuracy of the tongue strike during feeding behavior. After two to four days in such solutions, average strike accuracy of toads which attempt to feed falls to a low of 45%, 35% and 16%, respectively, compared with average levels of 75% to 93% in freshwater-acclimated toads. With continued exposure to the saline solutions, strike accuracy returns toward normal levels; the rate of reversion toward normal is inversely related to the degree of salinity. Toads kept in NaCl solutions at concentrations of 288 and 316 mOs do not differ in their strike accuracy from freshwater controls.

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