Recombinant DNA technology( Transgenic plant and animal)
Austrailian region by Tassanam Naz
1.
2. Extant /Area/Geographical range
Australian region covers
I. Australia
II. Tasmania
III. New guinea
IV. few of smaller islands of Indonesian
archipelago.
Newzealand and pacific islands are not
included in this region .
3. Physical features
New guinea and northern part of Australia are
tropical, with high summer temperature
Covered with luxuriant tropical rain forests
Southern side Australia is of temperate climate with
woody forests and deserts.
Eucalyptus and mixed hard wood forests
Interior Australian continent consists of hot, arid
plains and deserts .
Climate
Australian region is partly tropical and partly temperate
Southern Australia is of temperate climate
4. The region is unique having no land
connection
Boundaries
5. Zoological characters
Mammals:
There is absence of higher placental mammals
There is presence of a variety of primitive form of mammals , primitive forms
include mammals such as monotremes (egg laying mammals), marsupials
(pouched mammals )
The dominant mammals fauna consist of marsupials mammals like
Kangaroo
Wallabies
Wombats
PhalangersPhalangersPhalangers
Phalangers
Bandicoots
Bandicoots
Kangaroo
6. Zoological characters
Mammals:
Two families of monotremes are duckbill
platypus and echidna are found both are egg
laying mammals
are duckbill platypus
echidna
7. Zoological characters
Birds
Ten families of birds are unique to Australian region are flightless birds
are emus and cassowaries ,honey suckers, lyre birds , bower birds, tooth
billed pigions, birds of paradise
Absence of pheasants, woodpeckers, barbets and finches
Parrots and pigeons exhibit great diversity.
Other common birds are kingfishers, trogons, cuckoos , honey elaters.
honey
elaters
, trogons
kingfishers
, cuckoos
8. Zoological characters
Reptiles
In Australian region reptiles, only moderately varied and
only two families are exclusively found a.
Carettochelydidae b. Pygopodidae
250 species of small lizard all are same
Among large lizards komodo dragons, a varanid , only is
notable
Crocodiles occur in tropical parts of the region
9. Zoological characters
Amphibians
Australia is the only region in which the
common toad are absent and tail amphibians
are also absent
Common frogs and tree frogs are represented
by 100 species
11. Affinities :
Unique to having primitive form of mammals
Some fauna resembles with neotropical region and other fauna is
resembles with oriental region
This region have very little resemblance with Ethiopian region
Australian region has 134 families of terrestrial vertebrates of
which 30 are unique to this region.
30 families are endemic to this region.
I. a. 8 of mammals
II. b. 17 of birds
III. c. 3 of reptiles
IV. d. 2 of amphibians