Marine Biology

, Volume 43, Issue 3, pp 217–223

Some aspects of the thermal tolerance of Trichomya hirsuta (Mollusca: Bivalvia) of Eastern Australia

  • R. L. Wallis

DOI: 10.1007/BF00402314

Cite this article as:
Wallis, R.L. Mar. Biol. (1977) 43: 217. doi:10.1007/BF00402314


The upper temperature tolerance range for Trichomya hirsuta L. is described for acclimation temperatures of 10° to 32°C at 30% S. Changes in thermal resistance with time are described along with the incipient lethal temperatures. The eurythermicity for the species is 240.7 C°-squared. The ultimate upper incipient lethal temperature is 35.1°C. Definition of the incipient sublethal temperature is given, and is equal to 32°C. Diet effects are shown not to be significant in short-term lethal experiments, but indicate that unfed mussels reduce their resistance after prolonged exposure to high temperatures. Size was also shown to have no effect on resistance and tolerance. A comparison of the tolerance triangle of T. hirsuta with those of the temperate species Mytilus edulis and Mya arenaria revealed that the 24-h LT50 minus 2.2 C° approximates the incipient lethal temperature. The eurythermicities of the temperate species are Mytilus edulis, 363 C°-squared; and Mya arenaria, 415 C°-squared.

Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • R. L. Wallis
    • 1
  1. 1.School of ZoologyUniversity of New South WalesKensingtonAustralia