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osu2-5 - 1 Explain the problem of getting an accurate...

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1. Explain the problem of getting an accurate weight on animals in a growth trial. Why is it a problem, in which animals is this the biggest problem, and how do we correct for it? The problem for getting an accurate weight on animals in a growth trial is that there are many factors that can throw off a single weigh-in result of an animal. It’s much like when jockeys or wrestlers have to weigh in before a race or match, they have ways of ‘cheating’ the scales for a temporary weight. Factors can affect weight such as water intake, how full the GI tract is, when the animal went to the bathroom recently, and others. So it’s hard to get an accurate weight because one day there may be a weight that’s heavier than the next simply because they were weighed before they had urinated or defecated on the first day. These weighing errors are more prominent in ruminants because their GI tracts has a higher capacity than nonruminants, so the weight can fluctuate more. To correct for this problem, the animal’s weight is averaged over two or
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