13 May 2011 – Expert to Talk on Frog Declines – and Recovery
Posted on 10 May, 2011 by Connecting Country
Respected Melbourne-based biologist, Dr Richard Retallick, is presenting a summary of the research on the decline and possible recovery of frogs to the Castlemaine Field Naturalists Club on the evening of Friday 13 May (8pm at the Uniting Church Hall, entry from Lyttleton St, Castlemaine). All members of the community are welcome to attend. Entry is free.
Through the 1980s and 1990s, biologists were coming to a terrible consensus – populations of frog species were in decline at an alarming rate worldwide to the point where many species appeared to have disappeared completely within a short timeframe. At least two Australian frog species became extinct, and another two previously common local frog species, the Growling Grass Frog (Litoria raniformis) and Bibron’s Toadlet (Pseudophryne bibronii), effectively disappeared from the broader Castlemaine area.
Dr Richard Retallick was in the early phase of his academic career when a new potential causal factor was discovered – a disease called Amphibian Chytrid Fungus. Dr Retallick recalls, “Most of the populations that I had planned to study had either disappeared entirely or were reduced to a small number of individuals. Once chytrid fungus was identified for the first time, and linked to the unexplained frog declines worldwide, I was inevitably drawn into the whirlwind quest that followed, racing the clock to understand the impact and ecology of the fungus, which took me from the tropics of northern Australia to the deserts of Arizona and back to southern Australia.
“Despite its terrible consequences, the story of the discovery of chytrid fungus and the worldwide research to understand its origins and impacts and to find possible cures, is a remarkable one. There are still many unknowns, but each year a bit more of the puzzle is solved.”
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