Abstract
The temperature regime of the intertidal microhabitat of two species of co-existing amphibious stichaeoid fishes, Anoplarchus purpurescens and Pholis ornata, were compared with experimentally determined tolerances to elevated temperatures. Studies of the critical thermal maxima of the two species revealed only slight differences in temperature tolerance but exposure to a cycled pattern of high temperatures sharply differentiated the resistance times of the two species with P. ornata capable of tolerating greater cumulative exposure to thermal stress when administered in a cycled program of temperature fluctuations with peak temperature at 27 °C. While the experimentally determined temperature tolerances exceeded those measured in the field, the greater tolerance of P. ornata may facilitate habitation of intertidal mudflats during summer months.
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Barton, M. Response of two species of amphibious stichaeoid fishes to temperature fluctuations in an intertidal habitat. Hydrobiologia 120, 151–157 (1985). https://doi.org/10.1007/BF00032136
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DOI: https://doi.org/10.1007/BF00032136