Biological characteristics in approaching to biochemical and heavy metals of edible fish Terapon puta, cuvier, 1829 from different fishing sites along the Suez Canal, Egypt

Abstract

Biological characteristics, biochemical component and heavy metals levels were investigated in Terapon puta from three different fishing sites along the Suez Canal. The study aimed to evaluate the seasonal biological activities effect on protein, lipids, glycogen contents and heavy metals level. Length range, age and growth of T. puta were differed according to the fishing sites. Suez Bay, Great Bitter Lake and Lake Timsah constituting fish with mean total length of 10.15±0.96, 12.38±1.74 and 11.21±0.95 cm, with age groups of I, III, II years, growth rates (K) was found to be 0.88, 0.6, 0.7 per year and (L∞) 13.1, 17.5, 15.5, respectively. The spawning period established to be in summer. Heavy metals Cu, Zn and Cr in water had the highest levels in spring, Cd and Ni in summer while Fe in autumn. Levels of metals in fish muscles had the highest values of Cu and Zn in winter, Pb, Ni, Cd, Co, Cr in spring and summer which coincided the spawning period. Biochemical results in muscles revealed that the highest total protein was recorded in autumn, total lipid and glycogen were in spring. The spawning activity was correlated with increasing of protein and lipids levels in both pre-spawning (spring) and spawning seasons (summer), contrariwise the glycogen attained its lowest levels as it consumed to evaluate the spawning activity.