Different Yet Complimentary :: essays papers

Different Yet ComplimentaryEven though the Bergmann rule and Allan rule are unalike rules entirely they are both complementary to each other. In 1847 Bergmann observed that within the same spices of warm-blooded animals, populations thrust less bulky individuals are more than 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 bigger system 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 pass on 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 increa ses twice as fast as the surface size. Relatively less surface area results in comparatively less heat being scattered. 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 compact and subsequently has more surface area. The greater the body area, the faster body heat will be lost to the environment. A tall and slender individual will have the same volume but greater surface area. It is comparable to an animal with arm and legs. I will demonstrate to you in this essay that even though the Allan rule and Bergmann rule are two different rules they are also complementary to each other. I will show this through explaining each on thoroughly, compar e and contrast them and by presenting examples for each rule.Carl Bergmann was a 19th century biologist who pointed out that amongst birds and mammalian individuals of the same species tend to be larger and heavier when they lived in colder climates. This applies to pumas, bears, koalas, penguins, etc. Even in the case of people, there is an obvious difference between the height and exercising weight of a high-latitude Scandinavian and those of an equatorial pygmy.