Causes of extinction, Biology

CAUSES OF EXTINCTION -

1.       HUNTING -

  • Man started hunting wild animlas for food and safety trade and fun. It may be subsistence hunting, commercial hunting and sport hunting.
  • Now large scale killing has started for skin, fur, leather feathers, horn, ivory & meat etc.
  • Dodo (Raphus) of Moritius and chetah have recently disappeared due to excessive hunting.
  • Elephants & Rhinoceros are class to extinction due to hunting for ivory and horns.
  • Whales (blue whale) are about to extinct due to hunting for oil & whale bone.
  • Small musk deer is hunted for musk (used in perfumes).

2.       FOREST FIRES -

It is held that forest fires resulting from human activity or mistake have caused the elimination of many sps. of wild life.

3.       DISTRUCTION OF HABITATES -

Destruction of natural habitats causes the most serious threat to wild life.

Habitats are destroyed by many human activities due to development work, deforestation, pollution, cleanliness (vultures are about to extinct).

4.       PHYSICAL ALTERATION OF ENVIRONMENT -

Any physical change in the routes of the migratory birds or fishes adversely affects them.

Posted Date: 10/4/2012 6:10:41 AM | Location : United States







Related Discussions:- Causes of extinction, Assignment Help, Ask Question on Causes of extinction, Get Answer, Expert's Help, Causes of extinction Discussions

Write discussion on Causes of extinction
Your posts are moderated
Related Questions
HISTORICA L REVIEW Anoximander (600 B.C.) was the first western philospher who proposed the idea that "living creatures arose from the moist element". Empedocles (500 B.

Explains how selective breeding methods could be used to produce a population of cats with the short legs. Selective breeding E1: bases explanation on the assumption t

TECHNIQUE OF ASSESSMENT OF GROWTH AND DEVELOPMENT Measurement of physical growth in children is a key element in evaluation of the health status of children. Physical grow

Phylum Placozoa The phylum Placozoa contains a single species of a minute marine animal Trichoplax adharens composed of a dorsal and ventral epithelial layer enclosing loose m

Serogroups  Five major serogroups of N. meningitidis, A, B, C, Y and W-135, cause most human infection. Serogroup A is the leading cause of disease in the "meningitis belt" acr

Define Effect of Nutrition on the Immune System? Nutrition has a strong influence on the immune system of the elderly. Ageing induces dysregulation of the immune system, mainly

Q. What are vitamins? What are the major vitamins needed by humans? Most vitamins are coenzymes fundamental substances for the enzyme functioning that are not produced by the o

The Father of Botany (370-285 B.C.); of all the men who ever lived upon the earth certainly one of the most remarkable was Theophrastus of Eresus who was born about 370 B.C. on the

Test for Venous Function Make patient stand, apply a tourniquet at mid-thigh firmly enough to occlude the superficial veins, but not the deep veins or the arteries.

Periimplant Sulcus Fluid Analysis (PISF) This is not a parameter for clinical use but for experimental situations. However, it is important for us to know about it. Several bio