Why Big Fierce Animals Are Rare Why Are Big Fierce Animals Rare

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Paul Colinvaux an ecologist and zoologist was best known for many perceptions of energy and the food chain; however, the most important and challenging question he ever presented was, “Why Are Big Fierce Animals Rare? Colinvaux’s argued that big fierce animals were rare because of the lack of energy available to them after each step of the food chain. He felt that because meat eaters were the last on the food chain they were the animals mostly affected by the loss of energy which takes place through the stages of the food chain.

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Why Are Big Fierce Animals Rare
According to Colinvaux, big animals are rare because the energy that is available in every step of their food chain is degraded (Colinvaux, 1990). The heat that the body system converts into energy is lost during the animal’s food chain. Colinvaux argues that big animals decrease due to natural selection (Colinvaux, 1990). He proceeds to state that through natural selection, big animals get minimal favor in terms of finding resources and survival methods. According to researchers Kern and Grigg, in the big animal’s food chain, there is insufficient transfer of energy from one individual to the other (Kern & Griggs, 2005).
For example, Grigg states that the energy used in creating the food of a bird is only 10 percent (Kern & Griggs, 2005). In this case, the food of the bird, which is hawk, is a worm. Looking across the levels of the food web, each group of predator enlarges and become fiercer comparing with the last one. In addition to this, it is advisable to note that the amount of energy in the food web continues to decline (Colinvaux, 1990). In this case, the available space for a big fierce predator on top the web is minimal. This makes it impossible for the big animal to consume all the others in the food web. In such a system the amount of energy that scientists estimate hawk bring into the process of photosynthesis is 1/1000 (Morrison, 2001).
The less the energy available in this system means that small number of individuals can get support. This means that the big animals will be few in number in their ecosystem. In his research, Kern and Grigg adds that when the big fierce animal cannot harm those predators that might harm him (Kern & Griggs, 2005). Because of this reason, predators make sure they escape possible dangers when getting food. Case study of fish in Great Lake explains how it is easy to understand that big fierce animals are rare because of the energy degradation in their food chain. The following is food chain illustrating an ocean biome.

level why are big fierce animals so rare consumers are heterotrophs

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