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Behmene Ibrahim Elkhalil

  • Biodiversity Journal, 11 (4): 0853-0860

    Mohamed Daoudi, Benabdallah Bachir Bouiadjra, Jose Antonio Garcia Charton, Ibrahim El Khalil Behmene & Farid Hemida
    Growth and mortality of Conger conger (Linnaeus, 1758) (Pisces Congridae) in the Algerian basin
    https://doi.org/10.31396/Biodiv.Jour.2020.11.4.853.860

    ABSTRACT
    The growth and mortality of Conger conger (Linnaeus, 1758) (Pisces Congridae) were determined from 295 individuals, ranging from 38.9 to 174 cm total length, collected in the Algerian basin. The von Bertalanffy growth equation was established on the basis of the analysis of size structures by the ELEFAN I method, and is written as follows: Lt=224.4*(1-e-0.2t). The height-weight relationship shows a higher allometry Wt=0.0003*Lt3.4. The total (Z) and natural (M) mortality rates are 1.28 and 0.25 per year respectively. The exploitation rate E = 80% seems to show an overexploitation of the C. conger stock in the Algerian basin, for which we propose for this situation, management scenarios for this fishery, based on changes in fishing effort and variations in the size of the mesh of the trawl.

  • Biodiversity Journal, 11 (2): 363-368

    Behmene Ibrahim Elkhalil, Bachir Bouiadjra Benabdallah & Daoudi Mohamed
    On the presence of the African catfish Clarias anguillaris (Linnaeus, 1758) Siluriformes Clariidae) in south-eastern Algeria (Ifni-Illizi)
    https://doi.org/10.31396/Biodiv.Jour.2020.11.2.363.368

    ABSTRACT
    Experimental fisheries carried out in August 2019 made it possible to report the presence of a species of freshwater fish, Mudfish Clarias anguillaris (Linnaeus, 1758) (Siluriformes Clariidae), to Guelta Ifni (Illizi) an integral part of the Tassili N’Ajjer National Park (south-eastern Algeria). This species is on the IUCN red list as Least Concern (LC) being a taxon that does not qualify for Critically Endangered, Endangered, Vulnerable or Nearly Threatened. Surveys of 16 morphometric variables and three meristics, representing specific distinguishing characteristics, established on two male specimens, confirm this determination. This new locality will complete the current inventory of freshwater species reported in southern Algeria as well as the mapping of the distribution of the species in the in the African continent.