Ecological, Biological and Physiological studies on some fish species from Suez Canal and nearby areas
Amal Omar Baleg;
Abstract
Water pollution is caused basically by man’s inability to dispose wastes in a way that doesn’t change the water quality. The disposal of untreated waste water may be harmful concerning its possible hygienic and aesthetical effects and its impact on fauna and flora in the environment.
Suez Canal suffered from considerable sources of land based activities, waste discharging from tankers passing across the canal, domestic wastes, industrial effluents and fish processing activities. All the sources of pollution may affect the water quality of the canal, as well as increase the level of pollutants especially heavy metals, not only in the water and sediments but also in marine organisms.
The present study is conducted to investigate the water quality of Suez Canal water, heavy metals in water, sediments and fish collected along the canal. In addition to study the toxicity and effect of sublethal concentration of lead and copper into biochemical contents of fish Liza carinata. Some biological aspects is also studied in the fish under investigation.
The obtained results can be summarized as following:
1. Physico-chemical parameters
Water temperature, pH, salinity, DO and BOD were measured seasonally in the inshore water of different stations along the Suez Canal
1.1. Temperature (C)
Seasonal variations of water temperature in the area under investigation at different sectors (Port Said, Ismailia and Suez) showed that the highest mean values were during summer (32.20±1.39) and the lowest mean values were recorded in winter(17.10±0.44).
1.2. Hydrogen ion concentration (pH)
Port Said, Ismailia and Suez sectors attained highest mean values (8.33±0.08, 8.18±0.08 and 8.31±0.16) during autumn. While the lowest mean values (7.98±0.12, 8.02±0.24 and 8.17±0.09) were found in spring.
1.3. Salinity (‰)
The maximum value of salinity was obtained during winter which reached to 44.2 ‰ at station 12. While, minimum value was found at station 8 during summer (3.0 ‰).
1.4. Dissolvedoxygen (DO)
Port Said, Ismailia and Suez sectors had highest mean values of DO (9.03±2.39, 15.80±3.65 and 13.77±2.98 mgO₂\l) during autumn. While, the lowest mean values (3.98±0.75, 4.73±0.36 and 4.75±0.63 mgO₂\l) were recorded in spring.
1.5. Biological oxygen demand (BOD)
Stations 2, 7&8 and 11 attained the minimum BOD during winter (0.3), summer (2.00 and 1.00). While stations 3, 5 and 12 recorded the maximum BOD during autumn (8.13, 14.45 and 7.22 mg O2\l) for Port Said, Ismailia and Suez sectors.
2. Nutrient salts
2.1. Ammonia
Seasonal variations of ammonia in stations of different sectors (Port Said, Ismailia and Suez) showed that the highest mean values (13.13±16.12, 8.67±1.57 and 8.86±8.06 µgNH4-N/l) were during autumn and summer. While the lowest mean values (4.23±2.57, 3.24±2.63 and 4.43±4.76 µgNH4-N/l) were recorded in spring and autumn.
Suez Canal suffered from considerable sources of land based activities, waste discharging from tankers passing across the canal, domestic wastes, industrial effluents and fish processing activities. All the sources of pollution may affect the water quality of the canal, as well as increase the level of pollutants especially heavy metals, not only in the water and sediments but also in marine organisms.
The present study is conducted to investigate the water quality of Suez Canal water, heavy metals in water, sediments and fish collected along the canal. In addition to study the toxicity and effect of sublethal concentration of lead and copper into biochemical contents of fish Liza carinata. Some biological aspects is also studied in the fish under investigation.
The obtained results can be summarized as following:
1. Physico-chemical parameters
Water temperature, pH, salinity, DO and BOD were measured seasonally in the inshore water of different stations along the Suez Canal
1.1. Temperature (C)
Seasonal variations of water temperature in the area under investigation at different sectors (Port Said, Ismailia and Suez) showed that the highest mean values were during summer (32.20±1.39) and the lowest mean values were recorded in winter(17.10±0.44).
1.2. Hydrogen ion concentration (pH)
Port Said, Ismailia and Suez sectors attained highest mean values (8.33±0.08, 8.18±0.08 and 8.31±0.16) during autumn. While the lowest mean values (7.98±0.12, 8.02±0.24 and 8.17±0.09) were found in spring.
1.3. Salinity (‰)
The maximum value of salinity was obtained during winter which reached to 44.2 ‰ at station 12. While, minimum value was found at station 8 during summer (3.0 ‰).
1.4. Dissolvedoxygen (DO)
Port Said, Ismailia and Suez sectors had highest mean values of DO (9.03±2.39, 15.80±3.65 and 13.77±2.98 mgO₂\l) during autumn. While, the lowest mean values (3.98±0.75, 4.73±0.36 and 4.75±0.63 mgO₂\l) were recorded in spring.
1.5. Biological oxygen demand (BOD)
Stations 2, 7&8 and 11 attained the minimum BOD during winter (0.3), summer (2.00 and 1.00). While stations 3, 5 and 12 recorded the maximum BOD during autumn (8.13, 14.45 and 7.22 mg O2\l) for Port Said, Ismailia and Suez sectors.
2. Nutrient salts
2.1. Ammonia
Seasonal variations of ammonia in stations of different sectors (Port Said, Ismailia and Suez) showed that the highest mean values (13.13±16.12, 8.67±1.57 and 8.86±8.06 µgNH4-N/l) were during autumn and summer. While the lowest mean values (4.23±2.57, 3.24±2.63 and 4.43±4.76 µgNH4-N/l) were recorded in spring and autumn.
Other data
| Title | Ecological, Biological and Physiological studies on some fish species from Suez Canal and nearby areas | Other Titles | دراسات بيئية وبيولوجية وفسيولوجية على بعض الانواع من الاسماك من قناة السويس والمناطق القريبة | Authors | Amal Omar Baleg | Issue Date | 2016 |
Attached Files
| File | Size | Format | |
|---|---|---|---|
| G13042.pdf | 957.14 kB | Adobe PDF | View/Open |
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