Abstract
The median lethal times of survival of the barnacles Elminius modestus, Balanus crenatus and B. balanoides, when continuously submerged at high temperatures, were determined for individuals collected in the summer and winter. In E. modestus and B. crenatus there was no seasonal change in high temperature tolerance. In B. balanoides, however, the adults were more susceptible in the winter than in the summer to temperatures a little below the upper lethal temperature. Using less comprehensive data for other British species of barnacles, it is concluded that, in general, the order of tolerance to high temperatures corresponds to the order of temperatures within the geographical and the intertidal distributions of the species. From the time-temperature-survival curves, intertidal barnacles are living closer to environmental temperatures than would be supposed on the basis of the measurement of the upper lethal temperature, which has been commonly measured for many species, but is of less ecological significance.
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Communicated by J. E. Smith, Plymouth
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Foster, B.A. Tolerance of high temperatures by some intertidal barnacles. Marine Biology 4, 326–332 (1969). https://doi.org/10.1007/BF00350361
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DOI: https://doi.org/10.1007/BF00350361