[Biology of Squalus blainvillei (Risso, 1826) (Pisces, Squalidae) from the Tunisian coast: relation of body, liver and gonadal weight. Relative coefficients of condition and of hepato and gonosomatic processes. Embryonic development].

The relative increase of body-weight size, liver-weight size and gonad weight size relationships is pointed out in all individuals and chiefly in the young ones of Squalus blainvillei (Risso, 1826) of Tunisian coasts. The evolution of the cubic and relative coefficients of condition, and of hepato and gonosomatic relationships are depending of reproductive processes. During their growth, the embryos eat only vitellin reserves, the female uterin secretions interfere only on the ending gestation.