The Progressive Fish-Culturist
American Fisheries Society
In studies of the effects of elevated temperature on aquatic organisms, little emphasis has been placed on modeling the fluctuating temperatures to which organisms are exposed in nature. To some extent this may be related to problems of design and maintenance of apparatus for fluctuating temperature control. The complexity of apparatus used to provide cycled temperatures has ranged from manually controlled valves for introducing water of different temperatures into aquariums (Kelso 1972), to a complex and expensive feedback system, regulated by rotating cams, that controls the temperature of influent water (Honeywell Cam Programmer Thermometers, Fort Washington, Pennsylvania). To facilitate studies of the effects of temperature fluctuation on the growth of fishes, we constructed an apparatus that was easy to use and of moderate cost.
Wurtsbaugh, W. and G. Davis. 1976. An apparatus to provide diel temperature regimes for aquatic animals. Prog. Fish Cult. 38: 198-199.