Nom du corpus

Corpus Systématique Animale

Titre du document

Sex, reproductive cycle and variations in the fecundity of the family schilbeidae (Osteichthyes : Siluriformes) in Lake Kainji, Nigeria.

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Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Fecundity
  • Lake Kainji
  • reproductive cycle
  • Schilbeidae
  • sex ratio
  • sexual dimorphism
Nom du fichier dans la ressource
Poissons_v2b_003830
Auteur(s)
  • Akinola A. Olatunde
Affiliation(s)
  • Shagunu Field Station, P.M.B. 666, New Bussa, Nigeria
Résumé

The sex, reproductive cycle and variations in the fecundity of the family Schilbeidae (Osteichthyes : Siluriformes) in Lake Kainji, were investigated. Sexual differences in size and morphology were found to exist in all species. Sex ratio varied with species and season. There were more females than males in the population. Size at maturity varied from species to species with the males attaining maturity at a slightly lower length than the females. Breeding condition was attained mainly during the rains in Eutropius niloticus, Schilbe mystus and Siluranodon auritus and in the dry and rainy seasons in Physailia pellucida. Spawning occurred once during the breeding season in E. niloticus and S. mystus; and more than once during the prolonged breeding season in P. pellucida. Condition factors did not show any correlation with maturation of gonads. Fecundity was found to vary from species to species.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - marine biology & hydrobiology
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 - Aquatic Science
Catégories WoS
  • 1 - science ; 2 - marine & freshwater biology
Identifiant ISTEX
82E775B45905CC1EC1FC4B1A9BE437C7468AF6F4
Revue

Hydrobiologia

Année de publication
1978
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
8.716
Sous-corpus
  • Poissons
Type de publication
Journal
ark:/67375/1BB-8SFW5TLB-2
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