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Snail genetic tracks reveal ancient human migration: Mesolithic humans may have carried snail species from France to Ireland

Date:
June 19, 2013
Source:
Public Library of Science
Summary:
Some snails in Ireland and the Pyrenees are genetically almost identical, perhaps because they were carried across the Atlantic during an 8000-year-old human migration. The snail genetics tie in with studies of human genetics and the colonization of Ireland, according to new research.

Genetic markers in banded wood snails in Ireland and France reveal ancient human migrations.
Credit: Lauren Holden

Some snails in Ireland and the Pyrenees are genetically almost identical, perhaps because they were carried across the Atlantic during an 8000-year-old human migration. The snail genetics tie in with studies of human genetics and the colonization of Ireland, according to the research published June 19 in the open access journal PLOS ONE by Angus Davison and colleagues from the University of Nottingham, UK.

Despite being thousands of miles apart, one variety of banded wood snails from Ireland and southern France share similar shell patterns and mitochondrial genes that are rarely seen in other areas of Europe. Davison explains, "There is a very clear pattern, which is difficult to explain except by involving humans. If the snails naturally colonized Ireland, you would expect to find some of the same genetic type in other areas of Europe, especially Britain. We just don't find them."

He adds, "There are records of Mesolithic or Stone Age humans eating snails in the Pyrenees, and perhaps even farming them. The highways of the past were rivers and the ocean -- as the river that flanks the Pyrenees was an ancient trade route to the Atlantic, what we're actually seeing might be the long lasting legacy of snails that hitched a ride, accidentally or perhaps as food, as humans travelled from the South of France to Ireland 8,000 years ago."


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The above story is based on materials provided by Public Library of Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Adele J. Grindon, Angus Davison. Irish Cepaea nemoralis Land Snails Have a Cryptic Franco-Iberian Origin That Is Most Easily Explained by the Movements of Mesolithic Humans. PLoS ONE, 2013; 8 (6): e65792 DOI: 10.1371/journal.pone.0065792

Cite This Page:

Public Library of Science. "Snail genetic tracks reveal ancient human migration: Mesolithic humans may have carried snail species from France to Ireland." ScienceDaily. ScienceDaily, 19 June 2013. <www.sciencedaily.com/releases/2013/06/130619195131.htm>.
Public Library of Science. (2013, June 19). Snail genetic tracks reveal ancient human migration: Mesolithic humans may have carried snail species from France to Ireland. ScienceDaily. Retrieved April 20, 2014 from www.sciencedaily.com/releases/2013/06/130619195131.htm
Public Library of Science. "Snail genetic tracks reveal ancient human migration: Mesolithic humans may have carried snail species from France to Ireland." ScienceDaily. www.sciencedaily.com/releases/2013/06/130619195131.htm (accessed April 20, 2014).

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