Nom du corpus

Corpus Systématique Animale

Titre du document

The effects of selective fish predation on the horizontal distribution of pelagic Cladocera in a southern French reservoir

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Cladocera
  • Reservoir
  • Spatial Distribution
  • Fish predation
  • Alburnus alburnus
Nom du fichier dans la ressource
Poissons_v2b_005371
Auteur(s)
  • Didier Pont 1
  • Jamila Amrani 1
Affiliation(s)
  • 1) Laboratoire d'Hydrobiologie, Université de Provence, Marseille, France
Résumé

A four-year study showed a clear seasonal succession of species within the cladoceran community of the large, oligotrophic Sainte-Croix reservoir (S.E. France). Diaphanosoma brachyurum and Ceriodaphnia pulchella were strictly limited to the warm stratified period (July to October), whereas Bosmina longirostris and Bosmina coregoni were dominant during spring and autumn. Daphnia longispina was the only species to occur throughout the year with higher densities in spring. In spring and late autumn, the discharge of the inflowing river Verdon was high and the abundance of all species showed a gradient over the whole lake with lower densities close to the inflow. During the stratified period, water inflow was very low and species showed different patterns. Densities of the small form Ceriodaphnia pulchella were similar all along the long axis of the lake, whereas Daphnia densities were significantly higher near the dam. The distribution pattern of Diaphanosoma, an intermediate-sized species, showed similar trends to that of Daphnia. The only planktivorous fish in the pelagic zone, the bleak (Alburnus alburnus), fed mostly on large-bodied species (> 1.0 mm) and was more abundant close to the inflow current. A comparison between the length frequency distributions of cladocera upstream and downstream provided a clear demonstration of the effects of size-selective predation on prey populations. Finally, the interactions between spatial heterogeneity and long-term development of the zooplankton community and the indirect effects of predation are discussed.

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 - ecologie animale, vegetale et microbienne
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
Catégories WoS
  • 1 - science ; 2 - marine & freshwater biology
Identifiant ISTEX
642C37ADAFDCD6C9D7187F073333D2179A3167AC
Revue

Hydrobiologia

Année de publication
1990
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
8.218
Sous-corpus
  • Poissons
Type de publication
Journal
ark:/67375/1BB-HTJ4W8RQ-W
Powered by Lodex 9.3.8