Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

Copyright © Wydawnictwo Uniwersytetu Przyrodniczego we Wrocławiu, ISSN 1505-0297

Popek W. , Epler P. 1999. EFFECTS OF INTRAVENTRICULAR MELATONIN MICROINJECTIONS ON HYPOTHALAMIC CATECHOLAMINE ACTIVITY IN CARP FEMALES DURING A YEAR, EJPAU 2(2), #02.
Available Online: http://www.ejpau.media.pl/volume2/issue2/fisheries/abs-02.html

ABSTRACT

Assays, made on 64 mature carp females aged 5 years, were performed during the spawning season (summer) and in mid-winter. Some fish were subject to intraventricular melatonin microinjections, while other had their pineal gland excised. Intensity of fluorescence in the hypothalamic aminergic nuclei was determined with the fluorescence histochemical method. The lowest fluorescence intensity was revealed in those individuals lacking the pineal gland, the highest intensity being typical of the fish subject to intraventricular melatonin microinjections. In the winter series, all the fish showed a similar fluorescence intensity in the hypothalamic region studied. The results demonstrate a relationship between the pineal gland, melatonin, and the hypothalamic aminergic system, present in carp during the spawning period.

Key words: pineal gland, melatonin, hypothalamic catecholamines, hormonal control of maturity, carp..

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