Range expansion of the introduced cane toad <i>Bufo marinus</i> in New South Wales
1991
Seabrook, Wendy
Cane toads were introduced directly into New South Wales at Byron Bay between 1964 and 1966. This survey of their distribution found that cane toads now have a continuous distribution from the Queensland-New South Wales border south to Broadwater, west to Lismore, and along the river valleys west of Mullumbimby and Murwillumbah. The maximum rate of spread has occurred in a southerly direction at approximately 1.3 km/year, but was slower than the average rate recorded between 1965 and 1978. Although human-assisted spread was reported, natural range expansion could not be excluded, except in cases where cane toads had been introduced into areas outside their current range. Many incidents of cane toad releases into new areas were reported, extending as far south as Sydney. To date none have established viable populations except at Yamba. This population should be eradicated, and a public awareness campaign needs to be implemented to help reduce the number of toads being transported beyond their current range.
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