<P> The cane toads bred immediately in captivity , and by August 1935 more than 102 young toads were released in areas around Cairns , Gordonvale and Innisfail in northern Queensland . More toads were released around Ingham , Ayr , Mackay and Bundaberg . Releases were temporarily limited because of environmental concerns but resumed in other areas after September 1936 . Since their release , toads have rapidly multiplied in population and now number over 200 million and have been known to spread diseases affecting local biodiversity . Unfortunately , the introduction of the toads has not only caused large environmental detriment , but there is no evidence that they have affected the cane beetles they were introduced to predate . The toads have steadily expanded their range through Queensland , reaching the border with New South Wales in 1978 and the Northern Territory in 1984 . The toads on the western frontier of their advance have evolved larger legs ; this is thought to be related to their ability to travel farther . As a consequence of their longer legs , larger bodies , and faster movement , about 10 % of the leading edge cane toads have also developed arthritis . It was estimated that cane toads migrate at an average of 40 kilometres ( 25 miles ) per year as of 1994 , but new research in 2014 indicated that the migration rate had increased to 60 km per year on the western front . </P>
<P> The cane toads bred immediately in captivity , and by August 1935 more than 102 young toads were released in areas around Cairns , Gordonvale and Innisfail in northern Queensland . More toads were released around Ingham , Ayr , Mackay and Bundaberg . Releases were temporarily limited because of environmental concerns but resumed in other areas after September 1936 . Since their release , toads have rapidly multiplied in population and now number over 200 million and have been known to spread diseases affecting local biodiversity . Unfortunately , the introduction of the toads has not only caused large environmental detriment , but there is no evidence that they have affected the cane beetles they were introduced to predate . The toads have steadily expanded their range through Queensland , reaching the border with New South Wales in 1978 and the Northern Territory in 1984 . The toads on the western frontier of their advance have evolved larger legs ; this is thought to be related to their ability to travel farther . As a consequence of their longer legs , larger bodies , and faster movement , about 10 % of the leading edge cane toads have also developed arthritis . It was estimated that cane toads migrate at an average of 40 kilometres ( 25 miles ) per year as of 1994 , but new research in 2014 indicated that the migration rate had increased to 60 km per year on the western front . </P>
where were cane toads first released in australia
where were cane toads first released in australia
Cairns Gordonvale Innisfail Ingham Ayr Mackay Bundaberg
Cairns Gordonvale Innisfail Ingham Ayr Mackay Bundaberg