Page 51 - Genius Kidz Prudence Learning Sc-8

Types of migration (c) Remigration :

(a) Removal migration : Migration of generation for reproduction.
Permanent migration. Ist generation moves to an area,

Occurs due to either unfavourable reproduce there, the next generation
climatic conditions or due to shortage of off springs then return to native area.
food, water and shelter. (d) Seasonal migration :

(b) Irruption : Most common type of migration seen.
Migratory cycle in Birds show migration on change of
extreme climate. season as in spring or autumn.

For example in the Animals leave their home for one
case of flemmings season and then return back in the next
of Arctic Tundra. season.
Lemming of Arctic Tundra
Example : Siberian crane and sea lion
show seasonal migration.

comprises
of
v
Biodi
ersity
on
ms
for
ear
! ! Biodiversity comprises of different life forms on earth.
! Biodiversity comprises of different life forms on earth.
th.
life

different
lora.
f
as
species
is
called
Plant
! Plant species is called as flora.
! ! Plant species is called as flora.
species
called
! ! Animal species is called as fauna.
Animal
! Animal species is called as fauna.
is
as
fauna.
is
v
sev
wth,
ro
ersity
! Biodiversity is threatened due to several different reasons such as population growth, deforesation,
h
eral
deforesation,
threatened
population
to
different
! ! Biodiversity is threatened due to several different reasons such as population growth, deforesation,
reasons
suc
Biodi
due
as
g
loss, pollution and non-native species.
habitat loss, pollution and non-native species.
habitat
habitat loss , pollution and non-nati v e species .
ex-situ
be
b
y
v
ed
in-situ
conser
and
! Biodiversity can be conserved by in-situ and ex-situ methods of conservation.
! ! Biodiversity can be conserved by in-situ and ex-situ methods of conservation.
of
ersity
v
conser
v

ation.
methods
can
Biodi
categ
b
his
is
maintained
book
T
of
species

threatened
y
.
IUCN
ories
lists
different
Data
ed
! Red Data Book lists different categories of threatened species. This book is maintained by IUCN
! ! Red Data Book lists different categories of threatened species. This book is maintained by IUCN
Book
R

Nature
ation
of
Union
(International Union for the Conservation of Nature and Natural Resources).
esources).
(International Union for the Conservation of Nature and Natural Resources).
(Inter
Natural
and
R
national
v
for
the
Conser
the
! Species found in restricted areas is called endemic species and the phenomenon of their occurrence
rence
and
species
is
found
phenomenon

their
occur
! ! Species found in restricted areas is called endemic species and the phenomenon of their occurrence
of
areas
Species
called
endemic
restricted
in
is called endemism.
endemism.
called
is is called endemism.
response
another
mo
in
ement
T
hang
c
of

v
seasonal
animals
to
in
! The periodic or seasonal movement of animals from one place to another in response to change in
place
one
or
! ! The periodic or seasonal movement of animals from one place to another in response to change in
from
periodic
e
he
to
reproduction is called migration.
food
or
climate or for food or to ensure reproduction is called migration.
climate
climate or for food or to ensure re production is called mig ration.
ensure
to
for
or
EXERCISE
EXERCISE
1. Multiple choice questions.
(a) IUCN refers to :
(i) International Union for the Conservation of Nature and Natural Resources.
(ii) International Union for Conservation of Nature.
(iii) International Union for Conservation of Natural Resources.
(iv) None of the above.
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