130
C. Weile‘î al.
IV — CONCLUSION
'
The
hormonal
treatment
most
commonly
used
for
inducing spawning in
common
carp,
chinese and major indian carp is hypophysation. This technique
presents some
disadvantages
such as
the unpredictability of pituitary sup—
ply, the
problem
of standardization of the pituitary extracts and its par—
tial effectivness
(around 70 %).
The
use
of GnRH promoting endogenous GtH release seems promising. LHRH
analogs have
different advantages
:
they are commercially supplied and they
don‘t evoke antibody formation. On the other hand their efficiency on ovulation varies
with
the
species and the latency to ovulatory response is de—
layed compared to hypophysation. Removal of the dopamine inhibition improves
these
two
points as demonstrated by LIN 1986 and studies, still at an experimental stage,
are
made
in this
field. Furthermore, the use of salmon GnRH
analogues alone
seems
promising
and
further studies must
be
done in this
direction.
It is
evident
from the results
reported above that the development of a
new
hormonal
treatment
for
inducing spawning as well as the improvment of
hypophysation technique
implie
the
knowledge
of criteria determining the
appropriate time of its administration and this particularly in female.
REFERENCES
ANONYMOUS,
1977a.
A new highly effective ovulating agent for fish reproduc—
tion.
Practical application of LHRH analogue for the induction of spawning of farm fishes. Sci. sin., 20 :
ANONYMOUS, 1977b.
A
further
investigation
on
the
stimulatory effect of &
synthetic analogue of hypothalamic luteinizing hormone releasing hormo—
ne
(LRHa)
on
spawning
in
“Domestic
fishes". Acta Biochim. BiophysSinica, 9 : 15—23.
ANONYMOUS, 1978.
Radioimmunoassay
on
serum
gonadotropin of carp Cyprinus
carpio L. Acta Biochim. Biophys. Sinica,
10
:
399—407.
BIENIARZ K.,
EPLER
P.,
1976. Preliminary results of the in vivo studies on
ovarian
resorption
in
carp
(Cyprinus carpio L.). J. Fish. Biol., 81
4ü9—451.
““_'
BIENIARZ K.,
EPLER
P., POPEK w., 1977. Histological changes in the ovaries
of mature female carp in summer time.
Inv.
Pesq., 41
:
95—102°
BIENIARZ K.,
EPLER P., THUY L.N. and KOGUT E.,
1979.
Changes in the ovaries
of adult carp. Aquaculture, 17 : 45—68.
BIENIARZ K.,
EPLER P., THUY L.N. and BRETON B., 1980. Changes in blood gonadotrop1n
level
in
mature female carp following hypophysial homogenat8
injections. Aquaculture, 20 : 65—69.
BIENIARZ K.,
EPLER
P.,
POPEK
w., BILLARD R., SOKOLOWSKA M.,
1985. In 7th
conference
of
European
Society for Comparative Physiology and Bioche—
mistry. Barcelona Spain.
BILLARD
PETER
_R.E.,
1977.
Gonadotropin release after implantation
of
ant1estrogens ln
pituitary
and
hypothalamus
of
goldfish
CarassiuS
ËE£ÊËEÊ. Gen Comp. Endocrinol., 32 : 213—220.
C. Weile‘î al.
IV — CONCLUSION
'
The
hormonal
treatment
most
commonly
used
for
inducing spawning in
common
carp,
chinese and major indian carp is hypophysation. This technique
presents some
disadvantages
such as
the unpredictability of pituitary sup—
ply, the
problem
of standardization of the pituitary extracts and its par—
tial effectivness
(around 70 %).
The
use
of GnRH promoting endogenous GtH release seems promising. LHRH
analogs have
different advantages
:
they are commercially supplied and they
don‘t evoke antibody formation. On the other hand their efficiency on ovulation varies
with
the
species and the latency to ovulatory response is de—
layed compared to hypophysation. Removal of the dopamine inhibition improves
these
two
points as demonstrated by LIN 1986 and studies, still at an experimental stage,
are
made
in this
field. Furthermore, the use of salmon GnRH
analogues alone
seems
promising
and
further studies must
be
done in this
direction.
It is
evident
from the results
reported above that the development of a
new
hormonal
treatment
for
inducing spawning as well as the improvment of
hypophysation technique
implie
the
knowledge
of criteria determining the
appropriate time of its administration and this particularly in female.
REFERENCES
ANONYMOUS,
1977a.
A new highly effective ovulating agent for fish reproduc—
tion.
Practical application of LHRH analogue for the induction of spawning of farm fishes. Sci. sin., 20 :
ANONYMOUS, 1977b.
A
further
investigation
on
the
stimulatory effect of &
synthetic analogue of hypothalamic luteinizing hormone releasing hormo—
ne
(LRHa)
on
spawning
in
“Domestic
fishes". Acta Biochim. BiophysSinica, 9 : 15—23.
ANONYMOUS, 1978.
Radioimmunoassay
on
serum
gonadotropin of carp Cyprinus
carpio L. Acta Biochim. Biophys. Sinica,
10
:
399—407.
BIENIARZ K.,
EPLER
P.,
1976. Preliminary results of the in vivo studies on
ovarian
resorption
in
carp
(Cyprinus carpio L.). J. Fish. Biol., 81
4ü9—451.
““_'
BIENIARZ K.,
EPLER
P., POPEK w., 1977. Histological changes in the ovaries
of mature female carp in summer time.
Inv.
Pesq., 41
:
95—102°
BIENIARZ K.,
EPLER P., THUY L.N. and KOGUT E.,
1979.
Changes in the ovaries
of adult carp. Aquaculture, 17 : 45—68.
BIENIARZ K.,
EPLER P., THUY L.N. and BRETON B., 1980. Changes in blood gonadotrop1n
level
in
mature female carp following hypophysial homogenat8
injections. Aquaculture, 20 : 65—69.
BIENIARZ K.,
EPLER
P.,
POPEK
w., BILLARD R., SOKOLOWSKA M.,
1985. In 7th
conference
of
European
Society for Comparative Physiology and Bioche—
mistry. Barcelona Spain.
BILLARD
PETER
_R.E.,
1977.
Gonadotropin release after implantation
of
ant1estrogens ln
pituitary
and
hypothalamus
of
goldfish
CarassiuS
ËE£ÊËEÊ. Gen Comp. Endocrinol., 32 : 213—220.