'
in
heated
water
(about 500 higher than the natural tam
of”nhëated water) reach puberty 2 years earlier (Wilkoncka,
(
personal communication ; fig. 1).
follows
that
the
age
at
puberty in cyprinids is much more labile than
the
period of sexual differentiation according to all the reports Cited.
l
Acknowledgements.
The
author
wishes
to
thank
Dr.
M.
Sokolowska
for
criticæ.
reading of the manuscript.
‘
,
!
REFERENCES
ABRAHAM
M.,
H1LGE
V.,
LISON
S.,
TIBIKA
}L,
The
cellular
envelope of
oocytes in teleosts. Cell. Tiss.Res. 235, 403—410.
‘
\
ANCHUTIN
V.M.,
1982.
Reprodukcia karasci v lesostepnych ozerah zapadnoi Sibi—
ri.
Opyt. Kompleks.izych i ispolz.Karasyh.oz. Novosibirsk 1982, 162—173.
&
BIENIARZ K., EPLER P., LUONG—NGOC THUY, KOGUT E., 1979. Changes in the ovaries
J
of adult carp.
Aquaculture, 12, 45—68.
!
BIENIARZ
K.,
POPEK
W., BRETON B., EPLER P., 1985. Daily changes in the gonado—
tropin levels and response of carp oocytes to hypophysial homogenate. Chrono—
biology International, 2, 93—101.
‘
\
BILLARD
R.,
BRETON
B.,
FOSTIER
A.,
JALABERT
B.,
WEIL C.,
1978.
Endocrine con—
trol
of
the
teleost
reproductive cycle and its relation to external factors:
}
salmonid
and
cyprinid models. Com. Endocrinology. Elsevier/North—Holland, Biomedical
Press, Amsterdam, 37—48.
BRETON
B.,
HOROSZEWICZ
L.,
BIENIARZ
K.,
BILLARD
R.,
1980.
Temperature and re—
production in tench
:
Effect of a rise of the annual
temperature regime on go—
nadotropin level, gametogenesis and spawning. 1. The male. Reprod.Nutr.Develop
29, 105—118.
BRETON
B.,
HOROSZEWICZ
L., BIENIARZ K., EPLER P., 1980. Temperature and repro—
duction
in
tench
:
Effect
of
a
rise
in the
annual
temperature regime on goua—
dotropin
level,
gametogenesis and spawning.
2.
The
female.
Reprod.Nutr.Develop. 29, 1011—1024.
COOK
A.F.,
PETER
R.E.,
1980.
Plasma
clearance
of“
ganadotropin
in.
goldfish,
Carassius
auratus,
during the annual reproductive cycle.
Gen.
Comp.
Endoœ—
nol.,
76—90.
CRIVELLI
A.J.,
1981.
The
biology of the common carp Cyprinus carpio L. in the
Camargue, Southern France, J. Fish. Biol. 8, 271—290.
DAVIES P.R., TAKASHIMA F., 1980. Sex differentiationin Common Carp, Cyprius
carp10.
Tokyo Univ. Fish, 99, 191—199.
N.,
GRABOWSKA
B.,
WORNIALLO
E.,
1983.
Sex
differentiation
in
temm
L.). Zesz.Nauk.ART Olsztyn, 1Ê, 105—116.
in
heated
water
(about 500 higher than the natural tam
of”nhëated water) reach puberty 2 years earlier (Wilkoncka,
(
personal communication ; fig. 1).
follows
that
the
age
at
puberty in cyprinids is much more labile than
the
period of sexual differentiation according to all the reports Cited.
l
Acknowledgements.
The
author
wishes
to
thank
Dr.
M.
Sokolowska
for
criticæ.
reading of the manuscript.
‘
,
!
REFERENCES
ABRAHAM
M.,
H1LGE
V.,
LISON
S.,
TIBIKA
}L,
The
cellular
envelope of
oocytes in teleosts. Cell. Tiss.Res. 235, 403—410.
‘
\
ANCHUTIN
V.M.,
1982.
Reprodukcia karasci v lesostepnych ozerah zapadnoi Sibi—
ri.
Opyt. Kompleks.izych i ispolz.Karasyh.oz. Novosibirsk 1982, 162—173.
&
BIENIARZ K., EPLER P., LUONG—NGOC THUY, KOGUT E., 1979. Changes in the ovaries
J
of adult carp.
Aquaculture, 12, 45—68.
!
BIENIARZ
K.,
POPEK
W., BRETON B., EPLER P., 1985. Daily changes in the gonado—
tropin levels and response of carp oocytes to hypophysial homogenate. Chrono—
biology International, 2, 93—101.
‘
\
BILLARD
R.,
BRETON
B.,
FOSTIER
A.,
JALABERT
B.,
WEIL C.,
1978.
Endocrine con—
trol
of
the
teleost
reproductive cycle and its relation to external factors:
}
salmonid
and
cyprinid models. Com. Endocrinology. Elsevier/North—Holland, Biomedical
Press, Amsterdam, 37—48.
BRETON
B.,
HOROSZEWICZ
L.,
BIENIARZ
K.,
BILLARD
R.,
1980.
Temperature and re—
production in tench
:
Effect of a rise of the annual
temperature regime on go—
nadotropin level, gametogenesis and spawning. 1. The male. Reprod.Nutr.Develop
29, 105—118.
BRETON
B.,
HOROSZEWICZ
L., BIENIARZ K., EPLER P., 1980. Temperature and repro—
duction
in
tench
:
Effect
of
a
rise
in the
annual
temperature regime on goua—
dotropin
level,
gametogenesis and spawning.
2.
The
female.
Reprod.Nutr.Develop. 29, 1011—1024.
COOK
A.F.,
PETER
R.E.,
1980.
Plasma
clearance
of“
ganadotropin
in.
goldfish,
Carassius
auratus,
during the annual reproductive cycle.
Gen.
Comp.
Endoœ—
nol.,
76—90.
CRIVELLI
A.J.,
1981.
The
biology of the common carp Cyprinus carpio L. in the
Camargue, Southern France, J. Fish. Biol. 8, 271—290.
DAVIES P.R., TAKASHIMA F., 1980. Sex differentiationin Common Carp, Cyprius
carp10.
Tokyo Univ. Fish, 99, 191—199.
N.,
GRABOWSKA
B.,
WORNIALLO
E.,
1983.
Sex
differentiation
in
temm
L.). Zesz.Nauk.ART Olsztyn, 1Ê, 105—116.