Plasticity of foot muscle and cardiac thermal limits in the limpet Lottia limatula from locations with differing temperatures

Abstract

Likelihood-ratio tests comparing the goodness-of-fit between the null model and alternative model were used to further evaluate the hypothesis that limpets of higher CTmax have reduced plasticy. Based on the assumption that limpet CTmax responds to local temperatures with plasticity, the null linear regression model included site and acclimation as the only two explanatory variables predicting CTmax. The alternative model included the interaction between acclimation and site as an additional explanatory variable. If the alternative hypothesis significantly fitted the observations better, coefficient estimates of the interaction between acclimation and site were compared to see how plasticity differed among sites. Null and alternative hypothesis models’ goodness-of-fit was also compared using AICc.