Structure and Development of the LHRH-Immunoreactive Nucleus Olfacto-Retinalis in the Cichlid Fish Brain

  • M. D. Caprona de Crapona
  • H. Münz
  • B. Fritzsch
  • B. Claas


In vertebrates, the release of pituitary hormones involved in sexual behavior is most probably controlled by the gonadotropin releasing hormone (GnRH) system. In mammals, the decapeptid luteinizing hormone releasing hormone (LHRH) is the identified GnRH which guides the release of both gonadotropins LH and FSH. In teleosts, a slightly different LHRH-decapeptide was recently described (for a survey see Crim and Vigna 1983; Peter 1983). It is well known that gonadotropin release is influenced by internal and external factors and depends on the life cycle (Gorbman et al. 1983). Knowledge about the role sensory systems play in endocrine regulation is incomplete (for a survey see Breipohl 1982) but olfaction obviously plays an important role in this context (Kallman et al. 1944; Bronson 1982; Stacey and Kyle 1983; Meisel et al. 1984; Kelche and Aron 1984). In many vertebrates one can distinguish between at least three anatomically different olfactory subsystems:
  1. 1.

    the common or main olfactory system

  2. 2.

    the vomeronasal or accessory system and

  3. 3.

    the nervus terminalis system (NT)



Methylene Blue Olfactory Bulb Olfactory System Preoptic Area Cichlid Fish 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1986

Authors and Affiliations

  • M. D. Caprona de Crapona
    • 1
  • H. Münz
    • 1
  • B. Fritzsch
    • 1
  • B. Claas
    • 1
  1. 1.Fakultät für BiologieUniversität BielefeldBielefeld 1Germany

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