Category: Livestock

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A user’s view of grassland biodiversity

Sniffing around on biofuels turned up this recent post — Polycultures — at a blog called Muck and Mystery. It gives a farmer’s view of how biodiversity helps him to produce more.

My focus for a couple of years has been on winter active species, those that don’t go dormant when it is cold and the days are short. At my latitude and altitude I can grow grasses year round if I have a good mix. It seldom freezes or snows. Right now my pastures still produce though most of my neighbors have brown swards of dormant grasses. They don’t produce as well as when the days are long, but the forage I produce in the dead of winter is valuable. It reduces the amount of stored forage needed to support my herd, or said another way, it raises my stocking rate. I produce more per acre over the year. With the same land area and inputs I get more production.

There’s no information about who Gary Jones is, or where he farms, but I like the tenor and content of this and a few other posts I read there. I’m adding him to my RSS reader.

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Fido not a domesticated wolf?

Domestic dogs are derived from wolves, right? Maybe not. There is apparently a minority view that says that a better interpretation of behavioural, morphological and genetic differences between the domestic dog and the wolf is that the dog was domesticated from a now-extinct, pariah-like precursor, with occasional hybridization with wolves along the way. You can read more about this controversial view on Darren Naish’s zoological blog.

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Storing ram semen

There’s an article in The Economist (subscription needed, but you can also read it here), of all places, on the storage of livestock semen for transportation. There are apparently chemical additives available that prolong the life of bull and boar sperm, but nothing yet for ram sperm. This is a pity because semen is a much more convenient and cheap way of moving genes about than transporting live animals, not to mention safer. Which is why the ministry responsible for agriculture in the UK asked the Institute of Zoology in London to have a look at the problem. They decided to start by working out how all sorts of wild species with long-lived sperm – from bats to sharks – achieve that feat. A promising mixture of proteins called sAPM (soluble apical plasma membranes) has been identified, but the details are still secret. Could this have implications for ex situ conservation of sheep genetic resources?

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Cattle cause global warming

Well that’s a bit strong perhaps. What this article, based on an FAO report, does point out, however, is that the burgeoning global livestock sector produces 18% of global carbon dioxide emissions – which is more than transport. It is also having other serious environmental impacts. What to do? The report makes suggestions in the focus areas of reversing land degradation, increasing the efficiency of livestock production, and better water use. Genetic resources could of course contribute to all these.