Nom du corpus

Corpus Systématique Animale

Titre du document

Seasonal changes in reproductive condition and plasma levels of sex steroids in the blue cod, Parapercis colias (Bloch and Schneider) (Mugiloididae)

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • teleost
  • reproduction
  • blue cod Parapercis
  • sex steroids
Nom du fichier dans la ressource
Poissons_v2b_005066
Auteur(s)
  • N. W. Pankhurst 1
  • A. M. Conroy 1
Affiliation(s)
  • 1) Fisheries Research Centre, P.O. Box 297, Wellington, New Zealand
Résumé

Gonad and plasma samples were taken from blue cod captured throughout the reproductive cycle, gonad condition was assessed, and plasma levels of 17?-hydroxyprogesterone (17?OHP), 17?,20?-dihydroxy-4-pregnen-3-one (17?,20?P), testosterone (T), 17?-estradiol (E2) and estrone (E1) were measured by radioimmunoassay. It was confirmed that spawning occurred over an extended period in late winter and spring, with individual fish being involved in multiple spawning events. Plasma levels of T were bimodal in both sexes with peaks (maximum of 6.0 ng.ml?1) occurring 2 months prior to, and also during the early part of the spawning period. 17?,20?P was elevated in males (2.1 ng.ml?1) in mid-spermatogenesis coinciding with the first T peak (4.9 ng.m.?1). 17?,20?P was detectable but not significantly elevated (0.6–1.2 ng.ml?1) at any sample time in females. E2 was elevated in mature females (1.0 ng.ml?1) early in the spawning period but remained at assay detection limits (0.3 ng.ml?1) at all other sample times. Neither 17?OHP nor E1 were detectable in the plasma of either sex. It is suggested that bimodal increases in sex steroids prior to spawning may be a feature of species with rapid recrudescence.

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
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
0CDA94364D7CD4FC691E60044B081F805B14AC38
Revue

Fish Physiology and Biochemistry

Année de publication
1987
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.196
Sous-corpus
  • Poissons
Type de publication
Journal
ark:/67375/1BB-JNRRTT01-2
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