Reservoir
in China
349
3. Aquatic production robésses ate the result of the'coopèrative action
of three different compartments the water boy;*ihè
àä the
area Which is dried during
takes blade in the
water body, of
productivity is sèæibu91ÿ*àffeètéa By the 5
drying and ref100ding of marginal areas_and'the nature of the‘catChmentl The
vegetation c0ver and soil fertilitÿ of the cateëh£ have an é€séñÆia1 èf=*
feet on allochthonous matter
nitrogen, phosphoe
rus,
silicon) and therefor on food availability, The annual or seasonal dyna—
mics of drying and reflooding the
areas (caused by monsoons and
water
diScharge regulation) has a negative effect on the growth of
and benthos in this area and
of
the fish Spawning ‘
on
them.
Therefore, for developing
reservoir, add
fective management, managers should not only Consider how to
utilize biological resources in the water, but also how to
chment and management of the marginal areas so that more nutrients will
_
steadily flow into the
…:
'
B.
Shortening the foôd chain of fish produCtion and ü£iiiàîë the L‘}
'
trophic nich fully
”
‘
Because Of their plankt0u feeding behaviour, high food conversion and
fast growth, highead and silver earp in China aré commonly used as
principle species in
to 90 %
produc—
tion depends on
6f é food chain. Bénthôbhagoûs of;
piscivordùs fish have to pass
3fo
effiCiencÿ of each Step is about TO Z, tHËë the
ficienCÿ of the first battern is
higher ha that
second pattern, and so resefVoirè
give the highest
;;"
«Due to
surface, wâriôus
waters, various ecological environments, and vafiôùs food sources, the
reservoir provides fish with different types
l00 fish
species have been recorded in Chinese reservoirs. Thêféfôre, most of them
not
only stock bighead and silver carp ËS…Ëh3
but alos
s
resources
…
v
>
":fH
…
MAJOR
:
‘ReServôir fish
fish culture practice, but some innovations have been
lhe major ones
aSW811anlsherymanagement
}
.
A. Aÿprapfiatë_stÔCRîâ
Weis of
fish are
detritus and bacteria. The‘bhytoplanktoh Bfdmàgç is
mg/l (Li,
unpublished data). The amounts of detritus and bacteria have yet to be
measured, but it is commonly known that they occur in considerable amounts.
\ l…h\'H\hl
‘
in China
349
3. Aquatic production robésses ate the result of the'coopèrative action
of three different compartments the water boy;*ihè
àä the
area Which is dried during
takes blade in the
water body, of
productivity is sèæibu91ÿ*àffeètéa By the 5
drying and ref100ding of marginal areas_and'the nature of the‘catChmentl The
vegetation c0ver and soil fertilitÿ of the cateëh£ have an é€séñÆia1 èf=*
feet on allochthonous matter
nitrogen, phosphoe
rus,
silicon) and therefor on food availability, The annual or seasonal dyna—
mics of drying and reflooding the
areas (caused by monsoons and
water
diScharge regulation) has a negative effect on the growth of
and benthos in this area and
of
the fish Spawning ‘
on
them.
Therefore, for developing
reservoir, add
fective management, managers should not only Consider how to
utilize biological resources in the water, but also how to
chment and management of the marginal areas so that more nutrients will
_
steadily flow into the
…:
'
B.
Shortening the foôd chain of fish produCtion and ü£iiiàîë the L‘}
'
trophic nich fully
”
‘
Because Of their plankt0u feeding behaviour, high food conversion and
fast growth, highead and silver earp in China aré commonly used as
principle species in
to 90 %
produc—
tion depends on
6f é food chain. Bénthôbhagoûs of;
piscivordùs fish have to pass
3fo
effiCiencÿ of each Step is about TO Z, tHËë the
ficienCÿ of the first battern is
higher ha that
second pattern, and so resefVoirè
give the highest
;;"
«Due to
surface, wâriôus
waters, various ecological environments, and vafiôùs food sources, the
reservoir provides fish with different types
l00 fish
species have been recorded in Chinese reservoirs. Thêféfôre, most of them
not
only stock bighead and silver carp ËS…Ëh3
but alos
s
resources
…
v
>
":fH
…
MAJOR
:
‘ReServôir fish
fish culture practice, but some innovations have been
lhe major ones
aSW811anlsherymanagement
}
.
A. Aÿprapfiatë_stÔCRîâ
Weis of
fish are
detritus and bacteria. The‘bhytoplanktoh Bfdmàgç is
mg/l (Li,
unpublished data). The amounts of detritus and bacteria have yet to be
measured, but it is commonly known that they occur in considerable amounts.
\ l…h\'H\hl
‘