Effects of non-steroidal gonadal factors on LH secretion in female common carp during the reproductive cycle

J. Chyb, T. Mikolajczyk, M. Sokolowska-Mikolajczyk, M. Socha, P. Szczerbik, D. Biedroń, M. Dębowska, M. Kasiuk, J. Madej, E. Podczerwińska, M. Adamek and P. Epler
Additional contact information
J. Chyb: Department of Ichthyobiology and Fisheries, University of Agriculture in Krakow, Krakow, Poland
T. Mikolajczyk: Department of Ichthyobiology and Fisheries, University of Agriculture in Krakow, Krakow, Poland
M. Sokolowska-Mikolajczyk: Department of Ichthyobiology and Fisheries, University of Agriculture in Krakow, Krakow, Poland
M. Socha: Department of Ichthyobiology and Fisheries, University of Agriculture in Krakow, Krakow, Poland
P. Szczerbik: Department of Ichthyobiology and Fisheries, University of Agriculture in Krakow, Krakow, Poland
D. Biedroń: Department of Ichthyobiology and Fisheries, University of Agriculture in Krakow, Krakow, Poland
M. Dębowska: Department of Ichthyobiology and Fisheries, University of Agriculture in Krakow, Krakow, Poland
M. Kasiuk: Department of Ichthyobiology and Fisheries, University of Agriculture in Krakow, Krakow, Poland
J. Madej: Department of Ichthyobiology and Fisheries, University of Agriculture in Krakow, Krakow, Poland
E. Podczerwińska: Department of Ichthyobiology and Fisheries, University of Agriculture in Krakow, Krakow, Poland
M. Adamek: Department of Ichthyobiology and Fisheries, University of Agriculture in Krakow, Krakow, Poland
P. Epler: Department of Ichthyobiology and Fisheries, University of Agriculture in Krakow, Krakow, Poland

Czech Journal of Animal Science, 2008, vol. 53, issue 9, 398-403

Abstract: The aim of this study was to evaluate the effects of recombinant human inhibin A, recombinant human activin A and desteroidized ovarian extract on LH secretion in vitro and in vivo in female common carp during different stages of reproductive cycle. Inhibin stimulated spontaneous as well as GnRH-stimulated LH release in vivo in fish during gonadal recrudescence. This hormone did not have an influence on spontaneous LH secretion in the periovulatory period, but had a slightly inhibitory effect on GnRH-stimulated LH release in this stage of gonad maturity. Activin decreased spontaneous LH secretion during gonadal recrudescence and increased LH secretion before ovulation, having no effects on GnRH-stimulated LH release during both stages of gonad maturity. The desteroidized ovarian extract failed to modify spontaneous LH secretion, but decreased GnRH-stimulated LH release during recrudescence and especially before ovulation. It is to conclude that these data suggest the differential role of inhibin/activin as substances in the regulation of LH secretion in common carp females.

Keywords: inhibin; activin; ovarian extract; LH; common carp; aquaculture (search for similar items in EconPapers)
Date: 2008
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjs:v:53:y:2008:i:9:id:337-cjas

DOI: 10.17221/337-CJAS

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