Master of Science (MS)
First Committee Member
Iain J. McGaw
Number of Pages
The behavioral thermoregulation of the red swamp crayfish, Procambarus clarkii, was investigated and the environmental parameters of crayfish burrows were measured in situ. Although temperatures within burrows fluctuated less than surface temperatures in the Mojave Desert, crayfish can experience sub-optimal temperatures inside the burrow. In the laboratory, P. clarkii heated and cooled more rapidly in water than in air, selected a water temperature of 22Ã‚Â°C, and avoided water temperatures above 31Ã‚Â°C and below 12Ã‚Â°C. P. clarkii displayed three main shuttling behaviors between water and air and the relative amounts of these behaviors and the time spent in air were significantly greater at 34Ã‚Â°C than at 12Ã‚Â°C, 16Ã‚Â°C, 22Ã‚Â°C or 28Ã‚Â°C. This reflects an increased use of behavioral thermoregulation at critical temperatures. These periods of emersion were interspersed with frequent dipping in the water, allowing the crayfish to gain the benefits of evaporative cooling, without the physiological costs incurred by long-term exposure to air.
Behavior; Burrow; Clarkii; Crayfish; Environment; Procambarus; Thermoregulatory
Physiology; Ecology; Aquatic sciences
University of Nevada, Las Vegas
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Payette, Aaron Lawrence, "Thermoregulatory behavior of the crayfish Procambarus clarkii in a burrow environment" (2003). UNLV Retrospective Theses & Dissertations. 1502.