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The relation of changes in the individual levels of heat resistance of muscle tissue to their initial values during heat acclimation of asellus aquaticus



The relation of changes in the individual levels of heat resistance of muscle tissue to their initial values during heat acclimation of asellus aquaticus



Journal of Thermal Biology 9(4): 303-309



In hog slater, A. aquaticus, 5 extremities were consecutively isolated in the course of heat acclimation to study the pattern of changes in the level of the heat resistance of muscle tissue of each single specimen. The initial response of the population, during acclimation, is for the muscle resistance of different individuals to become less varied. Then a simultaneous increase in tissue resistance occurs in all animals, which is complete by the 6th day of acclimation. Afterwards the heat resistance of muscles in the majority of animals shows little change and then, in spite of maintenance of acclimation, it starts to return to its initial level. Thermal acclimation causes a temporary decrease in the variability of the heat resistance of the muscle tissue and also a temporary stabilization of this physiological characteristic to a new level. This phenomenon is a phenotypical masking of genotypic differences in a physiological characteristic in the population studied during changes in environmental temperature. At all the stages of acclimation the relation of individual increases in cellular heat resistance to their initial levels follows a hyperbolic exponential equation. This implies that to a rise in environmental temperature a population responds as an integral functional system.

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Accession: 006748951

Download citation: RISBibTeXText

DOI: 10.1016/0306-4565(84)90013-5


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