Mennad Moussa

• Biodiversity Journal, 9 (1): 045-050

  Chebel Fateh, Mennad Moussa & Mezedjri Lyamine
  Structure of the community associated with the gilthead sea bream Sparus aurata Linnaeus, 1758 (Pisces Perciformes Sparidae) of the Algerian east coasts (Jijel, Skikda, Annaba, El-Taraf)

  ABSTRACT
  The structure of the community associated with the gilthead sea bream Sparus aurata Linnaeus, 1758 (Pisces Perciformes Sparidae) of the Algerian east coasts is studied on the basis of data from the oceanographic campaign “ALDEM 2012” carried out in Algeria. The most characteristic species of the S. aurata are determined on the basis of three classification criteria, relative frequency (Fr), density (Dn) and biomass (Dw). These species are 88. Species diversity and evenness are calculated in the coasts of eastern Algeria taking into account the numbers and the weights. Distribution of specific abundance is studied from the models of Motomura, Mac Arthur and Preston. Determination of specific richness, specific diversity, equitability and use of abundance distribution models revealed a young (immature) community with one or more species that tend to dominate in number and weight. A principal component analysis (PCA) was carried out on a matrix of 88 species and 3 variables (Fr, Dn, Dw) in order to separate the species strongly associated with the gilthead sea bream. Mullus barbatus is the species most associated with S. aurata with a significant presence of Trachurus trachurus and Pagellus acarne and, to a lesser degree, Pagellus erythrinus.

  Download PDF