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Difference between red and black angus?
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<blockquote data-quote="djinwa" data-source="post: 921418" data-attributes="member: 8265"><p>It is true that black cattle can survive in hot climates. You would think cattlemen would have a higher goal than just keeping their cattle alive. Profits require more than that. Which is why this guy wrote about dealing with heat stress to increase profits. Note that being black is on the list of factors increasing heat stress. <a href="http://www.cattletoday.com/archive/2007/June/CT1033.shtml" target="_blank">http://www.cattletoday.com/archive/2007 ... 1033.shtml</a></p><p></p><p>Cattle can have all sorts of defects and still live. They can have bad feet, udders, poor growth, bad toplines, no muscle, etc, etc. Why do we bother selecting against such things when it doesn't kill them?</p><p></p><p>The chemistry of black things makes them absorb radiation. Since this includes light, they appear black. And in sunlight, they absorb solar radiation, which makes them hot. This is basic physics that is not debatable. Yes, there are white polar bears, and dark animals in Africa, but there are other factors to consider, like camoflauge.</p><p></p><p>I've seen studies measuring the increased rectal temperatures of black cattle. Yes, this won't usually kill them. But in extreme circumstances it can put them over the edge. It is added heat, which requires energy to dissipate. Cattle blow off heat with increased respiration, which burns calories. They also eat less. My point has been, if all else is pretty equal, why choose a color which increases the stress, and reduces profits?</p><p></p><p>You may have missed this thread. 612 dead feedlot steers from heat. In blacks, 25.6% mortality rate, in other colors, 8.7%.</p><p><a href="http://www.cattletoday.com/forum/viewtopic.php?f=8&t=74844" target="_blank">viewtopic.php?f=8&t=74844</a></p></blockquote><p></p>
[QUOTE="djinwa, post: 921418, member: 8265"] It is true that black cattle can survive in hot climates. You would think cattlemen would have a higher goal than just keeping their cattle alive. Profits require more than that. Which is why this guy wrote about dealing with heat stress to increase profits. Note that being black is on the list of factors increasing heat stress. [url=http://www.cattletoday.com/archive/2007/June/CT1033.shtml]http://www.cattletoday.com/archive/2007 ... 1033.shtml[/url] Cattle can have all sorts of defects and still live. They can have bad feet, udders, poor growth, bad toplines, no muscle, etc, etc. Why do we bother selecting against such things when it doesn't kill them? The chemistry of black things makes them absorb radiation. Since this includes light, they appear black. And in sunlight, they absorb solar radiation, which makes them hot. This is basic physics that is not debatable. Yes, there are white polar bears, and dark animals in Africa, but there are other factors to consider, like camoflauge. I've seen studies measuring the increased rectal temperatures of black cattle. Yes, this won't usually kill them. But in extreme circumstances it can put them over the edge. It is added heat, which requires energy to dissipate. Cattle blow off heat with increased respiration, which burns calories. They also eat less. My point has been, if all else is pretty equal, why choose a color which increases the stress, and reduces profits? You may have missed this thread. 612 dead feedlot steers from heat. In blacks, 25.6% mortality rate, in other colors, 8.7%. [url=http://www.cattletoday.com/forum/viewtopic.php?f=8&t=74844]viewtopic.php?f=8&t=74844[/url] [/QUOTE]
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