SREL Reprint #0489




Thermal Tolerance and Respiratory Movement of Bluegill from Two Populations Tested at Different Levels of Acclimation Temperatures and Water Hardness

James C. Murphy, Charles T. Garten, Jr., Michael H. Smith, and Edward A. Standora



Bluegill (Lepomis macrochirus) from two locations were acclimated at 16, 24, and 32C and at two levels of water hardness (conductivity 77 and 110 mmho).  Fish from a reservoir receiving thermal effluent had a higher critical thermal maximum (CTM) and lower rates of respiratory movement at each acclimation temperature than those from the control locations.  Respiratory movement and CTM increased as a function of acclimation temperatures.  Increased water hardness tended to decrease the CTM but had no consistent effect on respiratory movement.


SREL Reprint #0489

Murphy, J.C., C.T. Garten Jr., M.H. Smith, and E.A. Standora. 1976. Thermal tolerance and respiratory movement of bluegill from two populations tested at different levels of acclimation temperature and water hardness. p. 145-147. In Thermal Ecology II, edited by G.W. Esch and R.W. McFarlane. CONF 750425. ERDA Symposium Series.

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