Essay on AllanBergmann Rule

This is the first 1,000 characters of 4014 words (16.06 pages) in the essay titled AllanBergmann Rule

AllanBergmann rule

Even though the Bergmann rule and Allan rule are different rules entirely they are both complementary to each other. In 1847 Bergmann observed that within the same spices of warm-blooded animals, populations have less bulky individuals are more often found in warm climates near the equator while, those with greater bulk, mass, are found further from the equator in colder regions. This is due to the fact that big animals generally have larger body masses that result in more heat being produced. The greater amount of heat results from there being more cells. A normal by product of metabolism in cells is heat production. Subsequently the more cells an animal has, the more internal heat it will produce. In addition, larger animals usually have smaller surface area relative to their body masses and therefore are comparatively, in efficient at radiating their body heat off into the surrounding environment. This is illustrated when the volume increases twice as fast as the surface size. Relatively less surface area results in relatively less heat being lost. In 1877, Allen went further than Bergmann in observing that the length of arms, legs, and other appendages also has an effect on the amount of heat lost to the surrounding environment. He noted that among warm-blooded animals, individuals in populations living further away from the equator in colder environments. This is due to the fact that a thin body with relatively long appendages is less comp

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