Sexual Dietary Differences in a Population of Trionyx muticus

Michael V. Plummer, David B. Farrar
1981 Journal of Herpetology  
JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact . Society for the Study of Amphibians and Reptiles is collaborating with JSTOR to digitize, preserve and extend access to Journal of Herpetology. ABSTRACT-The
more » ... omachs of 105 Trionyx muticus contained mainly various invertebrates (primarily insects), fruits, and fish carrion. The diet of males was more diverse and was significantly different from that of females. About 71% by volume of the prey of females was aquatic items (especially Hydropsyche larvae), whereas about 67% of the prey of males was terrestrial items. No significant relationship could be found between comparisons of prey size and turtle size and of prey size and sex of turtle. Sexual differences in diet are related to different microhabitat preferences. Females forage primarily in stable microhabitats in deep water whereas males forage at the shallower interface between terrestrial and aquatic environments.
doi:10.2307/1563377 fatcat:uqyz45dsc5bglfc7lsj3doukxi