120
c, Weil et al‘.
INTRODUCTION
'
+
=
Induced
spawning
is
used in carp species which
can
mature but
spawn in
captivity
(major
indian
and
chinese carp) as well as for
which can
spawn when environmental required conditions are provided
carp). However,
in
this
latter case,
occurrence
and success
of
spawning are
and the use
of induced spawning techniques
Î
farmers-to
management by increasing the
duced fPY—
“,
-
..
Hormonally
induced spawning is commonly used for carp and related
oies and
the
knowledge of endocrinology of reproduction is
prove the
use
of these techniques. Besides, the success of these
can
be
improved by manipulating environmental cOnditions
toperiod, water quality, social
…
.
_
…_
In
the
present paper we will review the different
used in
carp
and
related species, including those which are
'
as
well as those which are still at an experimental stage. We will
the hormonal
changes
that occur and the
influence of environmental
on
their success.
I- _ ENDOCRINOLOGY OF REPRODUCTION
.
In
fish
environmental stimuli are known to sychronize the PhYËhms
reproduction via
the,
bPâiñ
processes. The transmisSion.iS
communicated
the
.endocrine system which is a link between
and the gonads.
_
'
“
“
_,
:
It
,
Nell
_
the activity o:f…the "
gonads (review
Z
8Ôldfïsh,
ràmentS…hêvee demonsërêëêd
hole
gland in
êPd… meiosis\ & YAMAZÀK?
SR€rmë‘°9€erièsiè
Ÿ L< BILLARD e£' J ai
1 97 1,) andm
pi£ùiisry hbèmbnëëñ‘
a
gonadotr_çpiç
‘
et
1919) àhd onfobçÿ e matuhàtioñ
1973) _ in goldfish
been developped
allowing
the
study
gonadotropin secretion during the
sexual
cycle in different cyprinid species.
;‘LSQht€d…(lDLER_ amelj NG 1979)
thought to
be necessary for complètion of Vitellogenesis although
has been questionned (BURZAWA—GERARD 1982).
…Ï
Pttytty g…………… …
a
p…
system Functlonal geflviaesaçe… frÏ cm
…
studi es hàs
implicated gthex-j nuclèus‘ '1‘a't‘er‘ai tuber‘ls(NLT)(PETER Î1éË/Oiÿ f…; a' istimùià‘tpsy
9Rä
…Ti@… à
(GhRä>ï
bth___ tŒRETONt11972>a :ç:
Peleaæwasalso inducedbymammallaHMHR)
…o i ÎiÏh
; -
andWEIL1973’ ANDMMOUS
(CRD/IW ï‘976 ) les ÏwëlÏlÏ àÏs -
bymlupt ig(PETER198…
;… : Rs:“bpæR
ltdfmhumlmhYPtbldntfd d…hd ( SRERNOOÇI?
,
"\vf \‘\’
\…
r‘
\…
,
,
\“
…
\
\
\
c, Weil et al‘.
INTRODUCTION
'
+
=
Induced
spawning
is
used in carp species which
can
mature but
spawn in
captivity
(major
indian
and
chinese carp) as well as for
which can
spawn when environmental required conditions are provided
carp). However,
in
this
latter case,
occurrence
and success
of
spawning are
and the use
of induced spawning techniques
Î
farmers-to
management by increasing the
duced fPY—
“,
-
..
Hormonally
induced spawning is commonly used for carp and related
oies and
the
knowledge of endocrinology of reproduction is
prove the
use
of these techniques. Besides, the success of these
can
be
improved by manipulating environmental cOnditions
toperiod, water quality, social
…
.
_
…_
In
the
present paper we will review the different
used in
carp
and
related species, including those which are
'
as
well as those which are still at an experimental stage. We will
the hormonal
changes
that occur and the
influence of environmental
on
their success.
I- _ ENDOCRINOLOGY OF REPRODUCTION
.
In
fish
environmental stimuli are known to sychronize the PhYËhms
reproduction via
the,
bPâiñ
processes. The transmisSion.iS
communicated
the
.endocrine system which is a link between
and the gonads.
_
'
“
“
_,
:
It
,
Nell
_
the activity o:f…the "
gonads (review
Z
8Ôldfïsh,
ràmentS…hêvee demonsërêëêd
hole
gland in
êPd… meiosis\ & YAMAZÀK?
SR€rmë‘°9€erièsiè
Ÿ L< BILLARD e£' J ai
1 97 1,) andm
pi£ùiisry hbèmbnëëñ‘
a
gonadotr_çpiç
‘
et
1919) àhd onfobçÿ e matuhàtioñ
1973) _ in goldfish
been developped
allowing
the
study
gonadotropin secretion during the
sexual
cycle in different cyprinid species.
;‘LSQht€d…(lDLER_ amelj NG 1979)
thought to
be necessary for complètion of Vitellogenesis although
has been questionned (BURZAWA—GERARD 1982).
…Ï
Pttytty g…………… …
a
p…
system Functlonal geflviaesaçe… frÏ cm
…
studi es hàs
implicated gthex-j nuclèus‘ '1‘a't‘er‘ai tuber‘ls(NLT)(PETER Î1éË/Oiÿ f…; a' istimùià‘tpsy
9Rä
…Ti@… à
(GhRä>ï
bth___ tŒRETONt11972>a :ç:
Peleaæwasalso inducedbymammallaHMHR)
…o i ÎiÏh
; -
andWEIL1973’ ANDMMOUS
(CRD/IW ï‘976 ) les ÏwëlÏlÏ àÏs -
bymlupt ig(PETER198…
;… : Rs:“bpæR
ltdfmhumlmhYPtbldntfd d…hd ( SRERNOOÇI?
,
"\vf \‘\’
\…
r‘
\…
,
,
\“
…
\
\
\