Dogs of war — Chornobyl

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Chornobyl dogs are distinct group, researchers find
Dogs of war — Beyond Nuclear International By Linda Pentz Gunter 23 Apr 23,

DNA research among Chornobyl’s dogs could provide answers about the effects of living in a radioactive environment

Pity the poor dogs (and cats) of Chornobyl. Abandoned in 1986 by owners fleeing the nuclear disaster, their descendants live on in the Chornobyl Exclusion Zone, an area deemed too radioactive for human habitation and in a country now at war.

…………………………………..The presence today of at least several hundred semi-feral domestic dogs living around the Chornobyl plant and beyond, indicates that the 1986 cull was not, of course, entirely successful. The Dogs of Chornobyl — and their more furtive feline friends — continue to survive down the generations in a highly radioactive environment. There are other threats too, including exposure to rabies and wolf packs that prey on the dogs and their puppies.

…………..So how are these animals surviving? And how well?

A new study, — The dogs of Chernobyl: Demographic insights into populations inhabiting the nuclear exclusion zone — published in the journal, Science Advances, has not yet answered this fundamental question. But the researchers have been able to gather important data to enable that next step.

The group studied the DNA of three sets of dog populations: those living at the Chornobyl power plant itself; those around nine miles away in Chornobyl City and another group around 28 miles away in Slavutych.

Their task was made easier by a surprising discovery: the dogs were not living in the traditional manner of wild dogs, or their closest ancestor, the Grey Wolf, but in distinct family units.

…………..These distinct family groups and lack of intermingling meant the researchers could easily identify different dogs through their DNA and thus distinguish those living at the nuclear plant from those living further away.

Co-author Tim Mousseau, professor of biological sciences at the University of South Carolina, has been visiting the Chornobyl site and studying the fate of its wildlife there since the late 1990s. At the same time, he began collecting blood samples from the Chornobyl dogs, curious to know how their bodies were handling such a significant radioactive load. Those samples are now being used in the current study to examine the dogs’ DNA. Wrote the authors in their paper:

“Hence, the dogs of Chernobyl are of immense scientific relevance for understanding the impact of harsh environmental conditions on wildlife and humans alike, particularly the genetic health effects of exposure to long-term, low-dose ionizing radiation and other contaminants, i.e., their adaptation to harsh living conditions makes them an ideal system in which to identify mutational signatures resulting from historical and ongoing radiation exposures.”

Mousseau’s wildlife studies have revealed shortened lifespans among birds and small mammals as well as the prevalence of tumors, sterility and cataracts among other phenomena considered related to exposure to radiation.

How or if the DNA of the Chornobyl-affected dogs has altered can now be examined……………………..

This in turn may lead to enlightenment on whether or not radiation damage is accumulating in their genomes and how this may affect their health and longevity — and that of other mammals similarly exposed — now and into the future https://beyondnuclearinternational.org/2023/04/23/dogs-of-war/