Spatial ecology and sexual colour dimorphism in a central Ontario population of Spotted Turtles (Clemmys guttata)

Abstract

Populations of endangered species distributed across variable environments may require site- specific conservation. Ontario’s coastal populations of spotted turtles (Clemmys guttata) are well-studied, but little is known about inland populations. I described the demography and spatial ecology of an inland population of spotted turtles in Ontario using mark-recapture data and radiotelemetry. The population’s sex ratio was skewed towards males; males also occupied larger home-ranges and travelled greater distances than females. Bright colours often play a role in signalling sex, and mate quality. Spotted turtles are sexually dichromatic in chin/eye colour; females bear brighter colours than males. I tested the effect of female chin colour on male spotted turtle mate choice using visual models and behaviour trials. Males were more likely to mate with the models as chin colour brightness increased. Future research should focus on inland female nesting behaviours, aestivation, and the role of chemical/tactile cues in turtle mate choice.