172
Aquabultuœ“bf Gypnids
_
6
7
8
…
THE EFFECTS OF ADMINISTRATION OF PIMOZIDE AND (D—Arg , Trp , Leu
,
—LHRH
(SGnRH—A) ON GONADOTROPIN (GtH) RELEASE AND OVULATION IN
FISH.
M. SOKOLOWSKÀ, R.E. PETER, C.S. NAHORNÏAK, J.E. RIVIER, and w.w.
Dcm}uümwï 05 Zoo£ogy, Univwüîy 05 A£beia, Mbe}vta, CANADA.
Dopamine has direct GtH release—inhibitory activity in
of the dopamine antagonist pimozide (Pim) greatly potentiates the
se—response
to LHRH analogues. Mature female goldfish held at 20°C were '
injected intraperitoneally with Pim, at a dose of 10 Ug/g,and sGnRH—A,
a
dose of 0.1 or 0.01 ug/g, at the same time, or at two separate times
Pim followed 3 hours later by the peptide; in another experiment thesej
dosages of Pim and sGnRH—A were given in the form of an elastomer
implantation. The results demonstrate that PIM potentiates the response
sGnRH—A at both 0.1 and 0.01 ug/g, whether given at the same time or
hours
apart. Pellet implantation had no effects on Gth levels. The
ovulated females in groups given Pim and sGnRH—A at 0.1 and 0.01 ug/g was
similar (87—100Z). There were no ovulations in groups implanted with pellets}
In conclusion, injection of Pim (10 pg/g) and sGnRH—A (0.1 or 0.01
is effective in inducing ovulation in mature female goldfish whether the
two
are
given at the same time or with a 3 hours interval, but not if implant
ted as
the elastomer pellets. There were no differences in the viability
fertilized eggs,
up
to
the eyed stage, between the group injected with
and sGnRH—A, and Spontaneous ovulâted females.
.
‘
STUDIES ON THE BREEDING AND DEVELOPMENTAL BIOLOGY OF CARP, Cyprinus
VAR, COMMUNIS
(LINN.) IN THE PLAINS OF PUNJAB, INDIA. H-.S. TOUR,
“Dcpa/v‘tme—M 05 Zoo£ogy, Punjab Ag/uécwüu/wÆ
LudhÀaha; l4ÎÛO4,:INÛIA.
:;
-:
…
The results of 10 years (1975—1985) research investigations on the
and developmental biology of common carp, Cyprinus carpio, have been
cycle of
species showed
that there are
six different stages (immature, maturing:
spent and spent recovering) with
overlap suggesting that the population of this fish has a relatively prolon—
ged breeding period. There is one main spawning season extending from Febru—
ary
during October!
and
fish in Punjab varies between 8 581 to “
wisestock assessment cf carp in 1975 showed that there is almost a complete
started
the Fisheries ResearCh Complex of the Punjab“"r
and
'
»
the‘fir3f
is, however, no significant difference in the
hreeding of
An intra+musbular
‘
ase in viable batch over»
treatment
as
indicated
characteri—
embryonic develoP”
ment. ess and
'I‘hé…Ôptimùm Values
of pH and
phosphates concentration5_are estimated to be 7.5—
8'0
0-12
Toxicity effects of some commonly used
PeSt1C1des(dlaZlnon,
mèlâthion and phOsphamidon)
and
Aquabultuœ“bf Gypnids
_
6
7
8
…
THE EFFECTS OF ADMINISTRATION OF PIMOZIDE AND (D—Arg , Trp , Leu
,
—LHRH
(SGnRH—A) ON GONADOTROPIN (GtH) RELEASE AND OVULATION IN
FISH.
M. SOKOLOWSKÀ, R.E. PETER, C.S. NAHORNÏAK, J.E. RIVIER, and w.w.
Dcm}uümwï 05 Zoo£ogy, Univwüîy 05 A£beia, Mbe}vta, CANADA.
Dopamine has direct GtH release—inhibitory activity in
of the dopamine antagonist pimozide (Pim) greatly potentiates the
se—response
to LHRH analogues. Mature female goldfish held at 20°C were '
injected intraperitoneally with Pim, at a dose of 10 Ug/g,and sGnRH—A,
a
dose of 0.1 or 0.01 ug/g, at the same time, or at two separate times
Pim followed 3 hours later by the peptide; in another experiment thesej
dosages of Pim and sGnRH—A were given in the form of an elastomer
implantation. The results demonstrate that PIM potentiates the response
sGnRH—A at both 0.1 and 0.01 ug/g, whether given at the same time or
hours
apart. Pellet implantation had no effects on Gth levels. The
ovulated females in groups given Pim and sGnRH—A at 0.1 and 0.01 ug/g was
similar (87—100Z). There were no ovulations in groups implanted with pellets}
In conclusion, injection of Pim (10 pg/g) and sGnRH—A (0.1 or 0.01
is effective in inducing ovulation in mature female goldfish whether the
two
are
given at the same time or with a 3 hours interval, but not if implant
ted as
the elastomer pellets. There were no differences in the viability
fertilized eggs,
up
to
the eyed stage, between the group injected with
and sGnRH—A, and Spontaneous ovulâted females.
.
‘
STUDIES ON THE BREEDING AND DEVELOPMENTAL BIOLOGY OF CARP, Cyprinus
VAR, COMMUNIS
(LINN.) IN THE PLAINS OF PUNJAB, INDIA. H-.S. TOUR,
“Dcpa/v‘tme—M 05 Zoo£ogy, Punjab Ag/uécwüu/wÆ
LudhÀaha; l4ÎÛO4,:INÛIA.
:;
-:
…
The results of 10 years (1975—1985) research investigations on the
and developmental biology of common carp, Cyprinus carpio, have been
cycle of
species showed
that there are
six different stages (immature, maturing:
spent and spent recovering) with
overlap suggesting that the population of this fish has a relatively prolon—
ged breeding period. There is one main spawning season extending from Febru—
ary
during October!
and
fish in Punjab varies between 8 581 to “
wisestock assessment cf carp in 1975 showed that there is almost a complete
started
the Fisheries ResearCh Complex of the Punjab“"r
and
'
»
the‘fir3f
is, however, no significant difference in the
hreeding of
An intra+musbular
‘
ase in viable batch over»
treatment
as
indicated
characteri—
embryonic develoP”
ment. ess and
'I‘hé…Ôptimùm Values
of pH and
phosphates concentration5_are estimated to be 7.5—
8'0
0-12
Toxicity effects of some commonly used
PeSt1C1des(dlaZlnon,
mèlâthion and phOsphamidon)
and