The influence of luteinizing hormone-releasing hormone (LH-RH) on serum gonadotropin levels and oocyte maturation in female carp (Cyprinus carpio L.)

Effects of LHRH and LHRH-A on plasma GtH levels and maturation/ovulation in the common carp, Cyprinus carpio, kept under various environmental conditions

“…Weil et al (1980) injected low dosages of luteinizing hormone-releasing hormone (LHRH) intravenously into gravid common carp, and, although plasma gonadotropin levels were increased and germinal vesicle migration induced in oocytes, ovulation did not occur. Similarly, Sokolowska (1982) found increased plasma GtH levels and oocyte maturation in carp following intrapituitary or intracardiac injection of LHRH, but no ovulation. These experiments were done with fish held in cement aquaria, and it is not known whether provision of certain environmental conditions, such as vegetation (as a potential spawning substrate) or pond water, may sensitize carp to injection of LHRH or LHRH-A due to natural abatement of GRIF.…”

Effects of LHRH and LHRH-A on plasma GtH levels and maturation/ovulation in the common carp, Cyprinus carpio, kept under various environmental conditions

“…Weil et al (1980) injected low dosages of luteinizing hormone-releasing hormone (LHRH) intravenously into gravid common carp, and, although plasma gonadotropin levels were increased and germinal vesicle migration induced in oocytes, ovulation did not occur. Similarly, Sokolowska (1982) found increased plasma GtH levels and oocyte maturation in carp following intrapituitary or intracardiac injection of LHRH, but no ovulation. These experiments were done with fish held in cement aquaria, and it is not known whether provision of certain environmental conditions, such as vegetation (as a potential spawning substrate) or pond water, may sensitize carp to injection of LHRH or LHRH-A due to natural abatement of GRIF.…”

The Effect of [(D-Ala6, Pro9NEt)mGnRH-a + Metoclopramide] (Ovopel) on Propagation Effectiveness of Two Breeding Lines of Common Carp (Cyprinus carpio L.) and on Luteinizing Hormone and 17α,20β-Dihydroxyprogesterone Levels in Females during Ovulation Induction

“…However, the authors of the present study are not aware of any publications addressing the problem of the association between the levels of these hormones measured during ovulation induction in common carp and the effects of controlled reproduction characterized by numerous traits. It is worth noting that changes in GtH levels in parallel with the progress of oocyte maturation were reported in common carp treated with LHRH by Sokołowska [ 56 ], with LHRH or LHRH-a by Billard [ 51 ], with CCPE by Levavi–Zermonsky and Yaron [ 57 ], and in fish from this species treated with an sGnRH superactive analog combined with/without dopamine receptor antagonist metoclopramide or with CCPE by Drori et al [ 58 ].…”

‘On-pituitary’ injection: a novel method for the in vivo investigation of secretory function of the pituitary gland in the common carp, Cyprinus carpio L.

“…A lot of drugs tested in vitro should be tested also in vivo. Accordingly, to economize on the use of the tested substances, a method of intrapituitary or intraventricular injection was already developed and used in carp (Sokolowska, Popek & Bieniarz 1978;Sokolowska 1982;Breton et al 1991). However, this method involves complicated surgical operation.…”

Effects of LHRH and LHRH-A on plasma GtH levels and maturation/ovulation in the common carp, Cyprinus carpio, kept under various environmental conditions

“…Weil et al (1980) injected low dosages of luteinizing hormone-releasing hormone (LHRH) intravenously into gravid common carp, and, although plasma gonadotropin levels were increased and germinal vesicle migration induced in oocytes, ovulation did not occur. Similarly, Sokolowska (1982) found increased plasma GtH levels and oocyte maturation in carp following intrapituitary or intracardiac injection of LHRH, but no ovulation. These experiments were done with fish held in cement aquaria, and it is not known whether provision of certain environmental conditions, such as vegetation (as a potential spawning substrate) or pond water, may sensitize carp to injection of LHRH or LHRH-A due to natural abatement of GRIF.…”

The Effect of [(D-Ala6, Pro9NEt)mGnRH-a + Metoclopramide] (Ovopel) on Propagation Effectiveness of Two Breeding Lines of Common Carp (Cyprinus carpio L.) and on Luteinizing Hormone and 17α,20β-Dihydroxyprogesterone Levels in Females during Ovulation Induction

“…However, the authors of the present study are not aware of any publications addressing the problem of the association between the levels of these hormones measured during ovulation induction in common carp and the effects of controlled reproduction characterized by numerous traits. It is worth noting that changes in GtH levels in parallel with the progress of oocyte maturation were reported in common carp treated with LHRH by Sokołowska [ 56 ], with LHRH or LHRH-a by Billard [ 51 ], with CCPE by Levavi–Zermonsky and Yaron [ 57 ], and in fish from this species treated with an sGnRH superactive analog combined with/without dopamine receptor antagonist metoclopramide or with CCPE by Drori et al [ 58 ].…”

‘On-pituitary’ injection: a novel method for the in vivo investigation of secretory function of the pituitary gland in the common carp, Cyprinus carpio L.

“…A lot of drugs tested in vitro should be tested also in vivo. Accordingly, to economize on the use of the tested substances, a method of intrapituitary or intraventricular injection was already developed and used in carp (Sokolowska, Popek & Bieniarz 1978;Sokolowska 1982;Breton et al 1991). However, this method involves complicated surgical operation.…”

Effects of LHRH and LHRH-A on plasma GtH levels and maturation/ovulation in the common carp, Cyprinus carpio, kept under various environmental conditions

“…Weil et al (1980) injected low dosages of luteinizing hormone-releasing hormone (LHRH) intravenously into gravid common carp, and, although plasma gonadotropin levels were increased and germinal vesicle migration induced in oocytes, ovulation did not occur. Similarly, Sokolowska (1982) found increased plasma GtH levels and oocyte maturation in carp following intrapituitary or intracardiac injection of LHRH, but no ovulation. These experiments were done with fish held in cement aquaria, and it is not known whether provision of certain environmental conditions, such as vegetation (as a potential spawning substrate) or pond water, may sensitize carp to injection of LHRH or LHRH-A due to natural abatement of GRIF.…”

The Effect of [(D-Ala6, Pro9NEt)mGnRH-a + Metoclopramide] (Ovopel) on Propagation Effectiveness of Two Breeding Lines of Common Carp (Cyprinus carpio L.) and on Luteinizing Hormone and 17α,20β-Dihydroxyprogesterone Levels in Females during Ovulation Induction

“…However, the authors of the present study are not aware of any publications addressing the problem of the association between the levels of these hormones measured during ovulation induction in common carp and the effects of controlled reproduction characterized by numerous traits. It is worth noting that changes in GtH levels in parallel with the progress of oocyte maturation were reported in common carp treated with LHRH by Sokołowska [ 56 ], with LHRH or LHRH-a by Billard [ 51 ], with CCPE by Levavi–Zermonsky and Yaron [ 57 ], and in fish from this species treated with an sGnRH superactive analog combined with/without dopamine receptor antagonist metoclopramide or with CCPE by Drori et al [ 58 ].…”

‘On-pituitary’ injection: a novel method for the in vivo investigation of secretory function of the pituitary gland in the common carp, Cyprinus carpio L.

“…A lot of drugs tested in vitro should be tested also in vivo. Accordingly, to economize on the use of the tested substances, a method of intrapituitary or intraventricular injection was already developed and used in carp (Sokolowska, Popek & Bieniarz 1978;Sokolowska 1982;Breton et al 1991). However, this method involves complicated surgical operation.…”