Category: Livestock

Posted on

The spread of agriculture into Europe

You may recall a post a few days back on how domestic pig keeping spread into Europe. Well, Razib over at Gene Expression, a genetics blog, has a post today which includes a map of the spread of agriculture north and west from the Middle East. He points out that current thinking is that either the practice of agriculture did the spreading (cultural diffusion), or people themselves (demic diffusion) — or both. Both was what the pig work implied, of course. Human genetic studies suggest that Neolithic people have made a fairly low (maybe 20%) contribution to European ancestry, and Razib summarizes the current debate about whether that therefore refutes the hypothesis that movement of people was involved in the spread of agriculture, as well as that of ideas. Bottom line: it probably doesn’t.

He also links to a recent paper that calculates a figure for the rate of movement ((Tracing the Origin and Spread of Agriculture in Europe. Pinhasi R, Fort J, Ammerman AJ. 2005. PLoS Biology Vol. 3, No. 12. doi:10.1371/journal.pbio.0030410)): 1 km/year, give or take. That was arrived at by interpolating radiocarbon dates of Neolithic archaeological sites across Europe, and it fits very well with the results of models using human genetic data. ((As far as I’m aware, however, nobody’s done anything similar with crops.)) An interesting way to think about that speed of movement is that it is roughly a one-day walk per generation.

Posted on

Cheese and olives

A column in the current issue of The Economist uses the example of Gruyère and Emmental cheeses in Switzerland to make the case that, if Europe wants to protect its traditional farmers and producers — and the agrobiodiversity which underpins their livelihoods — in the face of globalization, moving upmarket and selling expensive niche products to rich foreigners may be a better bet than “to deploy subsidies and tariffs to compete artificially on price.” Which is mostly what’s happening now.

[EU farm Commissioner] Mariann Fischer Boel … has urged food producers to focus on quality, heritage and new markets. This summer, she told exporters that import tariffs will move in only one direction in the coming years: “downwards”.

Of course, that will require marketing savvy. It will also require a robust quality-monitoring and labelling systems. Because, as a New Yorker piece on the “slippery business” of trading in fake Italian extra virgin olive oil entertainingly demonstrates this week, there are plenty of wise guys around ready to exploit loopholes and weaknesses.

Later: Cheese, olives, and wine!

Posted on

More “contaminated” bison

The ancestors of the bison, or buffaloes, of Catalina Island off the California coast arrived as movie extras in 1924. Scientists have always thought they were more likely to be pure-bred than many of the other buffalo that roam North America, because they’ve effectively been in isolation. Turns out it ain’t so. Nearly half the animals shipped off the island have maternal cow genes. Scientists believe the cross breeding probably occurred before the buffalo were shipped to Catalina — and nothing since 1924 has selected against it.

P.S. As the commenter to our original piece pointed out, nobody seems to have looked for bison genes in cattle. Why not?