A deadly frog fungus has decimated frog populations around the world, but frog biodiversity hotspot Papua New Guinea remains untouched - for now. In this episode of ABC podcast Pacific Scientific, James Purtill discovers the amphibian treasures of the world's largest tropical island, and what conservationists are doing to protect them.

Frog populations around the world have been decimated by a deadly fungus. But one place that has remained unaffected - so far - is Papua New Guinea.

It's home to the world's most diverse array of tropical frogs, including many species unknown to science. Conservationists are racing to safeguard these amphibian treasures before the fungus inevitably reaches Papua New Guinea.

The frog-killing fungus

The deadly fungal pathogen, called chytrid fungus, has swept around the world in recent years, causing mass mortality in some frog species and populations.

Chytrid fungus has been detected in New Zealand in both introduced and native frogs. It might be one factor behind the decline of the endangered Archey's frog, but its impact here is still not well understood.

When the worldwide chytrid epidemic began to accelerate in 2015, Yolarnie Amepou from the Piku Biodiversity Network in Papua New Guinea joined a search for the fungus. No evidence of chytrid was found, but scientists believe it's just a matter of time before the pathogen arrives on the world's largest tropical island.

A frog paradise

Papua New Guinea is home to rare and unique species, with many still unknown to science. In this episode from the ABC podcast Pacific Scientific, reporter James Purtill joins Yolarnie and her friend Heather for a frog hunt in the jungle near the capital city, Port Moresby.

James also checks out a captive frog facility where conservationists are raising an insurance population for if - or when - chytrid fungus hits.

Pacific Scientific is a podcast series covering science and scientists from across the Pacific. It is a co-production between ABC Science and Radio Australia. This episode was reported by James Purtill and produced by Tamara Cranswick.

James spoke to Yolarnie Amepou, director of the Piku Biodiversity Network, and Ryan Reuma, wildlife officer at the Port Moresby Nature Park.

The series producer is Jordan Fennell and executive producer is Will Ockenden. Jonathan Webb is the ABC science editor.…

Go to this episode on rnz.co.nz for more details