Insect Dominance Measure And Reason.

Measure of Dominance 1) More Number of Species- In the animal kingdom more than 85% of the species belong to insect group. 2)Large Number of Individuals in a single species- Ex- Locust swarm comprising of 10^9 number of individuals occupying large area. 3) Great Variety of Habitats Insect Thrive well under Varied conditions 4) Long Geological History- Insect were known to occupy this earth from 350 million years which is a good track record. Reason For Dominance 1) Capacity for flight- Insect Possess wings which is the lateral extension of exoskeleton. Flight is used for following purpose. 1) To seek Food, Mate, Shelter and oviposition sites. 2) To colonize in a new habitat and also to exchange habitat. 3) To escape From enemies and unfavorable conditions. 4) To migrate ( i.e for long distance travel) 2) Adaptability or Universality- Insect are the earliest groups to make their life on the earth and to occupy vast habitat of soil and water a) Found in wide range of climatic conditions from -50°C to 40°C. b) Psilopa petroli found in crude petroleum well. c) Ephydra fly living in great Salt lake. 3) Size- Majority of insect are small confering the following physiological and ecological advantages. a) Less space,food, Time and energy require b) Less gravitation effect c) Escape From Enemies.