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Heat-Energy-Budget Analysis and Heat Transfer in the Largemouth Blackbass (Micropterus salmoides)
Journal article

Heat-Energy-Budget Analysis and Heat Transfer in the Largemouth Blackbass (Micropterus salmoides)

Dale J. Erskine and James R. Spotila
Physiological zoology, v 50(3), pp 157-169
01 Jul 1977
DOI: https://doi.org/10.1086/physzool.50.3.30155719

Abstract

Body temperature Coefficients Convection Fish Freshwater fishes Gills Heat Heat transfer Thermoregulation Water temperature
A heat-energy-budget equation was developed to describe the heat-energy exchange between a fresh-water fish and its aquatic environment. Experimentally derived heat-transfer coefficients varied directly with water velocity. This relationship was clarified by the use of dimensionless variables. Heat-transfer coefficients were approximately two orders of magnitude greater than similar coefficients determined for terrestrial organisms. Rapid heat transfer occurs between a fish and the surrounding water because of a reduced boundary-layer thickness in water and the high heat capacity of this fluid. It appears that in still or moving water the major avenue of heat exchange for fresh-water fish is via the direct transfer of heat from/to the body surface to/from the water. The physical interactions between fish and water preclude the development of thermoregulatory adaptations such as changes in the thickness of insulation and circulatory modifications in all but the largest fish.

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