The given diagram illustrates the life cycle of the salmon. It is interesting to see that the
salmon lives in both fresh water as well as sea water.
The salmon lays its eggs in the upper river, where the water is slow moving. The spawn rests
in the cover of reeds and small stones for 5-6 months, after which the eggs hatch into ‘fry’,
which are 3-8 cm in length. These ‘fry’ live in the lower fast flowing river or estuary for the
next 4 years approximately. Here the ‘fry’ grow bigger and are now called ‘smolt’, which are
12-15 cm in length. The ‘smolt’ then migrate further downriver into the open sea, which is
their home for another 5 years roughly. Eventually, the salmon attains its full size of 70-76
cm in the ocean. After about 5 years, the salmon swims back to its birthplace to lay its eggs
and die.
Overall, the salmon passes through three distinct stages – the ‘fry’, the ‘smolt’ and the adult
salmon. The first two stages are in fresh water and the last stage is in saline water. No
wonder the salmon is called the super fish, as it lives in both – fresh and saline water.
The
given
diagram illustrates the life cycle of the salmon. It is interesting to
see
that the
salmon
lives
in both fresh
water
as well as
sea water.
The salmon lays its eggs in the upper river, where the
water
is slow moving. The spawn rests
in the cover of reeds and
small
stones for 5-6 months, after which the eggs hatch into ‘fry’,
which are 3-8 cm in length. These ‘fry’
live
in the lower
fast
flowing river or estuary for the
next
4 years approximately. Here the ‘fry’ grow bigger and are
now
called ‘
smolt
’, which are
12-15 cm in length. The ‘
smolt
’ then migrate
further
downriver into the open sea, which is
their home for another 5 years roughly.
Eventually
, the salmon attains its full size of 70-76
cm in the ocean. After about 5 years, the salmon swims back to its birthplace to lay its eggs
and
die
.
Overall
, the salmon passes through three distinct stages
–
the ‘fry’, the ‘
smolt
’ and the adult
salmon. The
first
two stages are in fresh
water
and the last stage is in saline
water
. No
wonder the salmon
is called
the super fish, as it
lives
in both
–
fresh and saline
water
.