Many species modify their behaviour in response to the scents of their predators, but species or populations living without predators may lose such abilities. This loss has been suggested to be irreversible, and to constitute a significant hurdle in restoring historical ecosystems. Olfactory predator recognition was studied in two macropodid marsupials -the tammar wallaby (Macropus eugenii) and the red-necked pademelon (Thylogale thetis). Both species are in the 'critical weight range' of Australian native ma…
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