1. Circadian changes in GtH secretion in carp males in contact or not with another male or hypophysed female
- Author
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P. Epier, K. Bieniarz, R. Billard, W. Popek, B. Breton, Agricultural University of Krakow, Laboratoire de physiologie des poissons, and Institut National de la Recherche Agronomique (INRA)
- Subjects
endocrine system ,medicine.medical_specialty ,Evening ,fertilisation animale ,cyprinus carpio ,medicine.drug_class ,[SDV]Life Sciences [q-bio] ,hormone animale ,cycle circadien ,comportement ,gonadotropine ,radioimmunologie ,03 medical and health sciences ,0302 clinical medicine ,poisson ,cyprinidae ,Internal medicine ,gth ,medicine ,Secretion ,Circadian rhythm ,gonadotropin ,Carp ,General Environmental Science ,Morning ,fish ,biology ,carp ,0402 animal and dairy science ,04 agricultural and veterinary sciences ,biology.organism_classification ,040201 dairy & animal science ,carpe ,behaviour ,circadian ,Endocrinology ,hypophyse ,ovulation ,Pituitary hormones ,General Earth and Planetary Sciences ,%22">Fish ,sense organs ,Gonadotropin ,General Agricultural and Biological Sciences ,030217 neurology & neurosurgery - Abstract
International audience; Changes in the maturational gonadotropin (c‐GtH) levels during 24 h in carp males, as a result of the presence or absence of other carp specimens, were investigated. Carp males were cannulated to ventral aortae. Gonadotropin levels were radioimmunologically determined. It has been found that in males two peaks of c‐GtH occur strictly in 2 periods during the day in which spawning takes place under natural conditions (early morning and late evening). Being in contact or not with another male or hypophysed female did not affect circadian changes in c‐GtH levels in investigated males.
- Published
- 1988
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