Rising cancer levels in animals

| 7th August 2009
A Tasmanian devil
High cancer levels could lead to the extinction of the Tasmanian devil
Report published in Nature expresses alarm at the impact of cancer on endangered species such as Tasmanian devil and beluga whale
 

Manmade chemicals are increasing cancer rates in animals - threatening some with extinction, according to a report published in Nature.

The report, 'Wildlife Cancer: a conservation perspective', said high cancer levels were found in wildlife populations living in environments heavily contaminated with chemicals.

It also said there was a danger that cancer levels could lead some species such as the Tasmanian devil into extinction.

'Relationships between tumour development and environmental contamination are strongly suggested by scientific data,' said report authors Denise McAloose and Alisa Newton citing the examples of liver and skin cancer suffered by fish living in industrialised waterways.

In Beluga whale populations living in Canada's St. Lawrence Estuary, an area polluted by the aluminum smelting industry, cancer is second biggest cause of death.

The report also found a similarity in cancer rates and tumour types between different species and said wildlife populations could act as 'important indicators of environmental discord.'

Tasmanian devil

The authors said in some cases the high levels of cancer may not be linked to manmade chemicals.

It said Devil facial tumour disease, not known to be linked to pollution, had decimated the Tasmanian devil population by 53 per cent since 1996 causing it to be listed as an endangered species by IUCN in 2008.

With predictions of a further 70 per cent reduction over the next decade the species could soon face extinction.

'If efforts fail and the Tasmanian devil disappears, it will represent the first known instance of a contagious cancer causing the extinction of a species,' said the report.

Useful links
Nature report

Donate

The Ecologist has a formidable reputation built on fifty years of investigative journalism and compelling commentary from writers across the world. Now, as we face the compound crises of climate breakdown, biodiversity collapse and social injustice, the need for rigorous, trusted and ethical journalism has never been greater. This is the moment to consolidate, connect and rise to meet the challenges of our changing world. The Ecologist is owned and published by the Resurgence Trust. Support The Resurgence Trust from as little as £1. Thank you. Donate here