SAFS 405 Lecture Notes - Lecture 5: Feed Conversion Ratio, Dairy Cattle, Antimicrobial Resistance

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Livestock systems occupy 30% of the planet"s ice-free terrestrial surface area. Takes up 78% of the agricultural land. In the developed world, we have done the expanding of livestock production we already have done; in other words, we are slowing down. But this is likely to change more drastically for developing countries because they will want more aspect to those products. Pigs: worldwide, we have more pork production and for all of those pigs, the carcass weight has increased. Due to breeding, selection of breeds that are more productive, and advances of nutrition. While pig weight and number have increased dramatically, sheep are about the same, and not a lot has been done about the carcass weight. In cattle, we have more cattle, more carcass weight and more milk has been produced. Chickens: more chickens, more carcass weight, more eggs as well. Rumen is the largest chamber that if filled with microbes that can break down the cellulose from grasses.

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