title: Water restriction and fluid temperature alter preference for water and sucrose solutions.
abstract: The role of diet temperature in ingestive behavior is poorly understood. We examined the importance of stimulus temperature and water-restriction state on the preference for and intake of water and sucrose. Using custom-designed equipment that allows us to monitor and maintain solution temperatures during testing (±0.1 °C), we conducted a series of 2-bottle preference tests (10 °C water vs. sucrose 10-40 °C) and brief access tests (10-40 °C water and sucrose). Water-restricted rats preferred cold water over any sucrose concentration (0.0-1.0 M) if the sucrose was 30 or 40 °C, whereas the same rats preferred sucrose at all concentrations and temperatures when unrestricted suggesting that the water-restriction state interacts with temperature preference. In a series of brief-access tests using a Davis Rig (MS-180), rats reduced licking to cold sucrose compared with 20 °C sucrose, suggesting that unlike water, cold temperature reduced the palatability of sucrose.
authors: Department of Psychology, Florida State University, Tallahassee, FL 32306, USA. torregrossa@neuro.fsu.edu
authors: Ann-Marie
authors: AM
authors: Torregrossa
authors: Michelle B
authors: MB
authors: Bales
authors: Joseph M
authors: JM
authors: Breza
authors: Thomas A
authors: TA
authors: Houpt
authors: James C
authors: JC
authors: Smith
authors: Robert J
authors: RJ
authors: Contreras
mesh_terms: D000818:Animals; D016000:Cluster Analysis; D003080:Cold Temperature; D005518:Food Preferences / Q000502:physiology*; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D013395:Sucrose / Q000378:metabolism*; D013649:Taste / Q000502:physiology; D013696:Temperature; D014867:Water / Q000502:physiology*
chemical_list: D014867:Water; D013395:Sucrose