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Karnataka Board PUCPUC Science 2nd PUC Class 12

In an aquarium two herbivorous species of fish are living together and feeding on phytoplanktons. As per the Gause’s Principle, one of the species is to be eliminated in due course of time

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Question

In an aquarium two herbivorous species of fish are living together and feeding on phytoplanktons. As per the Gause’s Principle, one of the species is to be eliminated in due course of time, but both are surviving well in the aquarium. Give possible reasons.

Long Answer
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Solution

Each species has a specific position or functional role within the community, called a niche. According to the Gausses principle, no two species can live in the same niche. In this case, two herbivorous species are living in the same niche and feeding on phytoplanktons. It may be because of the availability of sufficient phytoplanktons/and or less number of individuals of the fish species. of the two species might have occurred. And though neither of the species has been eliminated, niche overlapping may effect the growth and development of individuals of the species.

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Chapter 13: Organisms and Populations - LONG ANSWER [Page 96]

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NCERT Exemplar Biology Exemplar [English] Class 12
Chapter 13 Organisms and Populations
LONG ANSWER | Q 7. | Page 96

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