Nom du corpus

Corpus Systématique Animale

Titre du document

Sex steroids in intersexual fishes

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Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Monopterus albus
  • Rhabdosargus sarba
  • sex reversal
  • protogyny
  • protandry
  • steroidogenesis
  • sex steroids
Nom du fichier dans la ressource
Poissons_v2b_005093
Auteur(s)
  • S. T. H. Chan
  • W. S. B. Yeung 1
Affiliation(s)
  • 1) Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic, Hong Kong
Résumé

Studies of thein vitro gonadal steroidogenesis in intersexual fishes, using labelled testosterone as precursor, showed large species variation. The protogynousMonopterus albus produced predominantly 5?-reduced metabolites while the protandrousRhabdosargus sarba produced mainly 5?-reduced products. Both fishes synthesized 11-oxotestosterone; the synthesis of which appeared to mediate mainly through adrenosterone inM. albus butvia 11?-hydroxytestosterone inR. sarba. When the plasma levels of androstenedione, testosterone, 11-oxotestosterone, 11?-hydroxytestosterone, estrone and 17?-estradiol among the male, intersexual and female phase of the same species were compared, available data showed that either there was no obvious difference among the different sexual phases or the differences could be accounted for by the seasonal reproductive activities of the animal. Except for androstenedione, there are no marked changes in plasma testosterone, 11-oxotestosterone, 11?-hydroxytestosterone, estrone and 17?-estradiol levels in the intersexual phase compared with the female and male, it is unlikely that these classical sex steroids act as a primary trigger of natural sex reversal in these fishes; the role of androstenedione awaits further elucidation.

Catégories Science-Metrix
  • 1 - applied sciences
  • 2 - agriculture, fisheries & forestry
  • 3 - fisheries
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - biochimie analytique, structurale et metabolique
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
  • 1 - Health Sciences ; 2 - Medicine ; 3 - General Medicine
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Physiology
  • 1 - Life Sciences ; 2 - Biochemistry, Genetics and Molecular Biology ; 3 - Biochemistry
Catégories WoS
  • 1 - science ; 2 - physiology
  • 1 - science ; 2 - fisheries
  • 1 - science ; 2 - biochemistry & molecular biology
Identifiant ISTEX
EB0038CF48E08968B6830411F4928E974AE1233A
Revue

Fish Physiology and Biochemistry

Année de publication
1989
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
6.387
Sous-corpus
  • Poissons
Type de publication
Journal
ark:/67375/1BB-72C9TJ9M-8
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