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Nardjess Benamar

  • Biodiversity Journal, 10 (4): 353-358

    Nardjess Benamar
    Some parameters of growth, mortality and exploitation rate of round sardinella, Sardinella aurita Valencienne, 1847 (Pisces Clupeidae), fished in Oran bay (Algeria)
    https://doi.org/10.31396/Biodiv.Jour.2019.10.4.353.358

    ABSTRACT
    Growth and mortality parameters of Sardinella aurita Valencienne, 1847 (Pisces Clupeidae) were estimated based on length frequency distribution data. A total of 894 sardinella were collected between march 2008 and March 2009, from Oran bay (Algeria). The parameter b in the present study (W = a. Ltb ) is 3.1 and indicates that S. aurita had major allometric growth. The von Bertalanffy growth parameters were estimated by using the software FISAT II and showed that the asymptotic length (L ∞) is = 34.21 cm for females and 33.68 cm for males. The growth coefficient (K) is 0.47(1/year) for females and 0.39(1/year) for males. The value of total instantaneous rate of mortality (Z) is 2.41 and the natural mortality rate (M) is 0.79. The fishing mortality was obtained by F=Z - M = 1.62 year -1. The exploitation rate (E) is 0.67 year -1 and indicates that the stock of S. aurita from Oran waters is in overexploitation state.