Temperature-salinity tolerances of three hermit crab species,Clibanarius vittatus(Bosc),Pagurus LongicarpusSay andP. PollicarisSay (Crustacea: Decapoda; Anomura)

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Abstract
Three hermit crab species, Clibanarius vittatus (Bose), Pagurus Longicarpus Say and P. Pollicaris Say were acclimated to either 15 °C or 25°C and subjected to various test combinations of temperature and salinity. The 48-hour cumulative percentage mortalities were transformed using the arc sine square root procedure and computer-fitted with regression coefficients to generate response surfaces. The intertidal species, C. vittatus, was much more tolerant than the two subtidal Pagurus species, providing direct evidence for the generalization that intertidal zone organisms are more eurytopic than similar animals occupying other marine habitats. The temperature-salinity interaction effect was significant in all cases. Acclimation conditions had little effect upon tolerances.