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We studied the diet of Cape clawless otters (Aonyx capensis) at three sites along the easternand southern coast of South Africa to assess possible spatial variation along a communityspecies richness and biomass gradient associated with rocky shores.A total of 309 spraintsrepresenting two seasons (summer 2013/2014 and winter 2014) were collected and subsequentlyanalysed. The percentage occurrence and percentage dry mass of numerous preycategories were compared between sites and seasons. Variation in the importance of preyitems was found between sites, whilst no variation was found between seasons within thesame site. Crab was the most important prey item in the southernmost study area(Tsitsikamma National Park) and at the northernmost study site (KwaZulu-Natal Coast),whilst lobster was the most important prey item in the central area (Mkambati NatureReserve). Fish was the second most important prey item at all three sites. Our resultssuggest that otters are opportunistic feeders that are likely able to adapt to potential preyspecies and abundance changes associated with current and future anthropogenicallydriven changes. Furthermore, long-term, site-specific stability in diet suggests that monitoringthe diet of otters could provide some useful information on the status of shorelinecommunities.The South AfricanDepartment of Science and Technologythrough the National Research Foundation, andby a University of Pretoria Research DevelopmentProgramgrant (T. McIntyre).am201

An Assessment of Spatial and Temporal Variation in the Diet of Cape Clawless Otters (Aonyx capensis) in Marine Environments