Nom du corpus

Corpus Systématique Animale

Titre du document

Occurrence of an accessory cavity in the testis of the topmouth gudgeon, Pseudorashora parva , and its relation to juvenile intersexuality

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Poissons_v2b_003957
Auteur(s)
  • Hiroya Takahashi 1
  • Yukio Maeno 1
Affiliation(s)
  • 1) Department of Biology, Faculty of Fisheries, Hokkaido University, Minato-cho 3-1-1, 041, Hakodate, Japan
Résumé

The structure of the testis-sperm duct system of the topmouth gudgeon,Pseudorasbora parva, was examined histologically. In almost all of the young and adult males examined, a cavity was found to exist between the dorsomedian side of the testis and the opposed peritoneal wall. The testicular cavity was generally flat in shape and ran along the entire length of the testis, with a blind end at the level of the common sperm duct. It appeared that the testicular cavity was not implicated in the transport and storage of spermatozoa in the fish. By studying the process of differentiation and development of gonads in juvenile fish, it was confirmed that some germ cells in differentiating testes underwent oogenesis in many cases, and that the cavity was formed by fusion of the distal edge of the testes with the peritoneal wall in quite the same manner as the ovarian cavity. Thus, the testicular cavity of the topmouth gudgeon is homologous with the ovarian cavity and is apparently a preserved vestige of juvenile intersexuality occurring in this species of cyprinid teleosts.

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 - psychologie. psychophysiologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Identifiant ISTEX
3AF2FC4B746F9D361652A8AB6479EB43D91EF6A5
Revue

Japanese Journal of Ichthyology

Année de publication
1986
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
6.954
Sous-corpus
  • Poissons
Type de publication
Journal
ark:/67375/1BB-73D0F1ZW-F
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