HEAVY METALS CONTENT AND WATER QUALITY OF LAKE MARYOUT AND THEIR IMPACTS ON TILAPIA CONTAMINATION AND PHYSIOLOGY | ||
| Journal of Animal and Poultry Production | ||
| Article 3, Volume 28, Issue 6, June 2003, Pages 4399-4413 PDF (885.25 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jappmu.2003.244677 | ||
| Authors | ||
| A. M. EI-Okazy; S. A. Hassan; E. H. Ghoneim; Sanaa l. Saleh | ||
| Central Lab. For Food and Feed- Agricultural Research Center | ||
| Abstract | ||
| The aim of the present wort is to assess water quality. heavy metals content in lake Maryout water and in edible muscles of OreochromJs sureus, and to study the impact of pollution stress on fish body characteristics and physiology. There is no significant difference among the mean water selenium contents in the four basins. The overall average of selenium over the lake was 0.08 IJg I I. The northwest basin contains the highest water lead content (5.99 ± 0.37 IIg I I). The highest water cadmium and Iron levels were recorded in samples of the main basin (1.6 ± 0.10 IJg 'I and 1.21 ± 0.09 mg II respectively) while the lowest cadmium level was recorded at the fishery basin (0.44 ± 0.21119 I I). The southeastern basin showed the highest arsenic leve! (0.38 ;t 0.15 1)9 I I). The fishery and the soulheasl basins showed the highest chromium levels (11.13 ± 0.76 and 10.94 % 0.2 IJg II. respectively). The fishery basin was found to contain the highest nickel eontent (15.22 ± 1.02 )Jg f I). while the southeast basin showed the lowest nickel level (6.87 t 0.51 Ilg II). The highest water copper was recorded in fishery basin (8.53 :I: 0.20 IJg f I). The pH of the main basin showed the lowest values with a . mean 01 7.11:1: 0.18. Sulfides values recorded at the main basin were drastically variable (0.0 - 14.2) with a mean of 4.48 % 0.86 mg f I. The highest sulfate level was recorded at the fishery and the northwest basins (1870.6 % 170.7 and 1846 ± 140.6 mg II, respectively). The lowest sulfate value was recorded at the main basin (631.9 t 36.4 mg II). The highest fish muscle lead content was observed in the southeast basin (23.97 % 5.15 Ilg I kg) and the lowest was recorded In the northwestern (3.83 % 1.28 Ilg I kg). There were no significant differences in the mean cadmium. arsenic and nickel contents in OnJochromis BUf'llUS muscles of the four basins. The highest chromium conlenl was found in fish muscles of the southeast basin (754.9 % 19.2 IJg I kg). The highest Copper contents were recorded in fish muscles of southeast and the northwest basins (481.5%10.64 and 470.4 %8.22 ~g f kg, respectively). The highest muscles iron conlent was recorded in fish muscles of :he northwest and the main basin (313.4 % 3.39 and 311.4 % 2.87 mg I kg respedively). Fish caught from the main basin and from the nshery basin showed signifICantly higher condiUon factor than those caught from the northeast and southeast basins. The highest moisture content was noticed in nesh of main basin. The highest protein percent was recorded in fish muscles of the fishery basin. There were no significant differences in hepatosomatic indices of fish or the four basins. Fish caught from the southeast basin showed the hiohest relative gall bladder wei9hts. Fish of the southeast basin showed the highest activity 0' liverl (GOT). (GPT), and (ALP) followed by those of the main basin and the northwest basin. The fishery basin lilapia exhibited the lowesl activllles of lhe three mentioned enzymes. The main basin tilapla showed the least brain (AChE) activity of the enzyme followed by thOse of the Southeast basin The highest (AChE) activity was recorded at the nOflhweSI basin. | ||
| Keywords | ||
| Oreochromis aUnlus. pollution; water quality; heavy metals, liver and brain enzymes | ||
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