Animal distribution in the whole world follows a definite pattern

1. WELCOME

2. ZOOGEOGRAPHY: KINDS OF ANIMAL
DISTRIBUTION
Dr. Abhilash Peter
Christ College
Irinjakkuda

3. Cosmopolitan distribution (Universal or continuous)
-Rats, bats, cuckoos, Mytilus etc.
-Adaptations to diverse environments. Migarte long distances
and overcome barriers.
-Eurytopic
-Stenotopic (Snail).

4. Discontinuous distribution (Disjunctive)
-Same species in different areas far apart from one another
without continuity. Eg. Camels
-Continuous distribution in past. Lost continuity due to
extinction.
-Other eg. Peripatus, Belostoma, Lung fishes, Ostrich, Emu,
Kiwi etc.

5. Belostoma- America,
Southern Asia & Australia
Protopterus- Africa
Southern Asia & Australia
Lepidosiren- South America
Neoceratodus- Australia
Lung fishes

6. Birds

7. Isolated distribution
-Isolated regions of earth
-Primitive and are on the verge of extinction.
Duckbilled platypus (Australia & Tasmania)
Sphenodon (Newzealand)

8. Bipolar distribution
-Challenger expedition 1872-76
-Arctic and Antartic regions.
-Relics of previously cosmopolitan fauna.
-Migrated to polar regions
Eg. Lamprey, Salmon

9. METHODS OF ANIMAL DISTRIBUTION (Means of
dispersal)
-Process whereby an organism
is able to spread from its
place of origin to another locality.
-Active and passive
Passive and active methods
can be summarized as follows
Land bridges-
Isthmus of Panama- Eocine times

10. Thank you