Abstract
This study concerns the assessment of the morphological parameters, growth and abundance indices oftwo populations of Pseudophoxinuscallensisin Bouhchicha wadi and the Bleu lake within the National Parkof El-Kala (North-East Algeria). According to its environment, P.callensis shows an adaptation throughdifferent strategies. In Bouhchicha wadi, several cohorts coexist all around the year then gradually joinduring the summer season to form pseudo cohorts. In the Blue Lake, P.callensis shows an annual cycle witha single cohort that begins its cycle in April-May then diminishing gradually in late autumn. The FISAT IIanalysis reveals that for a 95% confidence interval, the growth parameters of P.callensis are 67.39-80.08 mmin Bouhchicha wadi, but lower with 43.31-61.20 mm in the Blue Lake. In Bouhchicha wadi, the asymptoticlength Lâ reaches the highest value (79.80 mm) with a growth coefficient K of 0.480 years-1. In the Blue lake,Lâ reaches 59.85 mm with a growth coefficient K of 0.180 years-1. In the Total Length-Weight relationship,the regression equation shows a clear difference between Bouhchicha wadi (R = 0.91) and the Blue lake (R= 0.64). Both populations exhibit sexual maturity at different times of the year.
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