In many parts of Africa, carnivores such as lions and wild dogs still come into frequent conflict with pastoralist communities such as the Maasai because of their attacks on their cattle and goats. This naturally results in a tension between the aims – and indeed the practitioners – of wildlife conservation and of rural development that does no good to either camp. So it is interesting to read of a study which looked at how to foster co-existence between people, domesticated animals, and large predators. The paper identifies improvements to traditional livestock management, as well as other measures, that can contribute to wild carnivore conservation by minimizing the risk to livestock.
European aurochs DNA in domestic cattle
A study ((Edwards CJ et al., 2007. Mitochondrial DNA analysis shows a Near Eastern Neolithic origin for domestic cattle and no indication of domestication of European aurochs. Proceedings Royal Society B 274:1377-1385)) just published by the Royal Society sheds some light on the genetic relationship between the European auroch and modern European cattle breeds. Cattle were initially domesticated perhaps around 10,000 years ago in Mesopotamia, and independently in India and probably Africa. As animal agriculture spread into Europe from the Middle East, domesticated cattle must have coexisted with wild European aurochs for some time, since aurochs in Europe didn’t die out until much later (in fact, the last aurochs appear to have lived in Poland around 1627). Analysis of contemporary as well as ancient mitochondrial DNA from Middle Eastern and Central European archaeological sites now seems to suggest that European cattle originated solely from Middle Eastern aurochs, and that no introgression of European auroch genes into domesticated cattle occurred during their long coexistence.
However, an earlier study ((Götherström A et al., 2005. Cattle domestication in the Near East was followed by hybridization with aurochs bulls in Europe. Proceedings Royal Society B 272:2345-2350)) did show that there had indeed been introgression of auroch Y chromosomes into Northern and Central European domestic cattle and that these Y chromosome markers still exist in some European breeds. Of course, what might seem contradictory really isn’t: mitochondria are strictly inherited from one’s mother, and the mating of domestic cows with auroch bulls wouldn’t have left any mitochondrial evidence. It would be interesting to know whether such hybridization occurred surreptitiously or intentionally, which of course would suggest that early framers knew something about the benefits of cross-breeding.
From H. Michael Kubisch.
EU puts Trust in Sheep
A new Consortium to study heritage sheep breeds across Europe got off the ground recently with a meeting in Yorkshire, England. The meeting came at the end of a project set up by the European Union, although I confess I have found it very difficult to find out more. Help, if you can.
Heritage breeds are not necessarily rare, but they are often geographically isolated and that can put them at risk. After the most recent outbreak of foot and mouth disease in England man thousand Herdwicks were dead in England, and blue tongue threatened the Mergelland sheep of the Netherlands. The project will study threats and how to conserve and make use of sheep breeds. According to Amanda Carson, of the Sheep Trust, who is leading the new European consortium, “the information we gather will also inform policy-makers, nationally and at European level, about the best way to look after our farm animal genetic resourcesâ€.
Separating the cows from the goats
Some lactose intolerant people drink goat’s milk instead of cow’s milk because it is more digestible. Turns out they could be at risk of vitamin A deficiency. Well, not really. But a recent French study that compared farmhouse cheeses made from cow’s milk and goat’s milk discovered that chevres contained no beta carotene, a precursor of vitamin A. Vive la difference.