Summary
Pupfish (Cyprinodon nevadensis amargosae), which inhabit shallow, thermally instabile desert waters were acclimated to a series of constant temperatures (15, 25 and 35 ° C) and to a symmetrical fluctuating temperature regime (15–35 ° C). A range or scope of thermal tolerance of 39 ° C between critical thermal maxima and minima exists for this species (Fig. 1). Upon acclimation to cycling temperatures, this tolerance range increased significantly to almost 41 ° C (Fig. 2). Hence, these fish can apparently compensate physiologically for both warm and cold temperatures simultaneously.
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References
Aleksiuk, M.: An isoenzymic basis for instantaneous cold compensation in reptiles: lactate dehydrogenase kinetics inThamnophis sirtalis. Comp. Biochem. Physiol.40B, 671–681 (1971)
Brett, J. R.: Some lethal temperature relations of Algonquin Park fishes. Univ. Toronto Stud. Biol. Ser. 52; Publ. Ont. Fish. Res. Lab.63, 1–49 (1944)
Brown, J. H., Feldmeth, C. R.: Evolution in constant and fluctuating environments: thermal tolerances of desert pupfish (Cyprinodon). Evol.25, 390–398 (1971)
Edney, E. B.: Acclimation to temperature in terrestrial isopods I. Lethal temperatures. Physiol. Zoöl.37, 364–377 (1964)
Fry, F. E. J.: Responses of vertebrate poikilotherms to temperature. In: Thermobiology, ed. A. H. Rose, p. 352–409. New York: Academic Press 1967
Fry, F. E. J.: The effect of environmental factors on the physiology of fish. In: Fish physiology 6, p. 1–98, eds. W. S. Hoar and D. Z. Randall. New York: Academic Press 1971
Heath, W. G.: Thermoperiodism in sea-run cutthroat trout (Salmo clarki clarki). Science142, 486–488 (1963)
Hochaehka, P. W., Lewis, J. K.: Enzyme variants in thermal acclimation: trout liver synthetases. J. biol. Chem.245, 6567–6573 (1970)
Hochachka, P. W., Somero, G. N.: The adaption of enzymes to temperature. Comp. Biol. Physiol.27, 659–668 (1968)
Hoskins, M. A. H., Aleksiuk, M.: Effects of temperature, photoperiod, and season onin vitro metabolic rates of tissues fromThamnophis sirtalis parietalis, a cold climate reptile. Comp. Biochem. Physiol.45A, 737–756 (1973)
Moon, T., Hochachka, P. W.: Temperature and enzyme activity in poikilotherms; isocitrate dehydrogenase in rainbow trout. Biochem. J.123, 695–706 (1971)
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Robert Feldmeth, C., Stone, E.A. & Brown, J.H. An increased scope for thermal tolerance upon acclimating pupfish (Cyprinodon) to cycling temperatures. J. Comp. Physiol. 89, 39–44 (1974). https://doi.org/10.1007/BF00696161
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DOI: https://doi.org/10.1007/BF00696161