Competition for Resources Among Consumers
In the previous chapter we examined growth of populations whose reproductive rate was constant. In nature, the rate of population growth very often varies. If r varies randomly, a population may become extinct or, alternatively, suffer enormous increases in abundance, since the reproductive potential of any species is capable of producing very large numbers of new individuals. Since few environments are overwhelmed by living organisms, there must be mechanisms that inhibit increase in abundance as density increases. This, in brief, is the theory behind the logistic equation,* first suggested by P.F. Verhulst in 1838 and later derived independently by R. Pearl and L.J. Reed in 1920 (Hutchinson, 1978).
KeywordsReef Fish Interspecific Competition Intraspecific Competition Niche Breadth Adult Fish
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