Short-term effects of mercury on survival, behaviour, bioaccumulation and ionic pattern in the catfish (Clarias Lazera)

Hilmy, A.M.; Domiaty, N.A. El; Daabees, A.Y.; Moussa, Farouzia I

doi:10.1016/0742-8413(87)90012-0

Cited by 8 publications

(3 citation statements)

References 22 publications

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“…Many studies dealt with the effect of mercuric chloride (MC) on fish focusing on its accumulation (Hilmy et al 1987;Voegborlo et al 2007;Zarnescu 2009), alteration of biochemical constituents (am and Sathyanesan 1984; Sastry and Rao 1984) and histopathological changes (Liao et al 2006) in different tissues of fish species. In addition, little studies were conducted of MC on the oxidative stress parameters and antioxidant defenses in fish organs (Bano and Hasan 1989; Akter 2007) in spite of the exceeded exposure of fish to such metals now and later due to the widespread of industrial pollutants.…”

Section: Discussionmentioning

confidence: 99%

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Physiological studies on the effect of copper nicotinate (Cu–N complex) on the fish, Clarias gariepinus, exposed to mercuric chloride

Al-Salahy

2010

Fish Physiol Biochem

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Female catfish, Clarias gariepinus, were collected from the Nile River at Assiut region, were divided into 7 groups. The first group was left as control, and the second was treated with mercuric chloride (MC) for 3 weeks following by normal water for 1 week. The third, fourth and fifth groups were provided by MC (150 μg/ l of water). This treatment was continued for 3 weeks. Then, the fish were received CN instead of MC, for 1 week, with 15 and 25 mg CN/100 g wet food. The fifth fish group received diet supplemented with vit E (α-tocopherol) (100 mg/kg wet diet), for 1 week, instead of MC treatment. Vitamin E was used as standard antioxidant drug. Following 3 weeks of normal ambient water, the sixth and seventh aquaria received only CN for 1 week, with 15 and 25 mg CN respectively/100 g wet food, respectively. At the end of the experiment, Samples of liver, kidneys (posterior part), gills (right gills) and ovary were excised. The measurement included the oxidative stress parameters: carbonyl protein and total peroxide and the antioxidant enzyme activities superoxide dismutase (SOD), catalase (CAT) and glutathione S-transferase (GST) in all selected organs. MC treatment induced harmful effect in fish, probably due to its enhancing effect on reactive oxygen species (ROS) production in fish organs especially the respiratory and osmoregulatory organs namely gills. The result suggests that this gill damage may exert hypoxic case, anoxia for different organs and some Cu excretion resulting in a magnification of ROS overproduction. Also, the observed oxidative stress in ovary tissue of MC-treated fish may affect fish fertility. The addition of CN in fish diets could protect the fish C. gariepinus against MC-induced oxidative damage showing recovery of fish organs. It could suggest that the detoxifying mechanism of action of CN is mainly due to its scavenging activity of free radicals rather than tissue healing.

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Section: Discussionmentioning

confidence: 99%

“…The dose of MC was chosen based on the finding of Hilmy et al (1987) who found that LC 50 of MC exposure in Clarias lazera (length, 22-25 Cm) for 96 h was 720.0 lg/l(= 0.72 PPM) and this dose was highly toxic.…”

Section: Methodsmentioning

confidence: 99%

Physiological studies on the effect of copper nicotinate (Cu–N complex) on the fish, Clarias gariepinus, exposed to mercuric chloride

Al-Salahy

2010

Fish Physiol Biochem

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“…Signs of acute mercury poisoning in fish included flaring of gill covers, increased frequency of respiratory movements, loss of equilibrium, excessive mucous secretion, darkening coloration, and sluggishness (Armstrong 1979;Hilmy et al 1987). Signs of chronic mercury poisoning include emaciation (due to appetite loss), brain lesions, cataracts, diminished response to change in light intensity, inability to capture food, abnormal motor coordination, and various erratic behaviors (Armstrong 1979;Hawryshyn et al 1982).…”

Section: A Aquatic Organismsmentioning

confidence: 97%

Mercury Hazards from Gold Mining to Humans, Plants, and Animals

Eisler

2004

Reviews of Environmental Contamination and Toxicology

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Distribution of mercury in the soft tissues of the blue tilapia Oreochromis aureus (Steindachner) after acute exposure to mercury (II) chloride

Allen

1994

Bull. Environ. Contam. Toxicol.

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Short-term effects of mercury on survival, behaviour, bioaccumulation and ionic pattern in the catfish (Clarias Lazera)

Cited by 8 publications

References 22 publications

Physiological studies on the effect of copper nicotinate (Cu–N complex) on the fish, Clarias gariepinus, exposed to mercuric chloride

Physiological studies on the effect of copper nicotinate (Cu–N complex) on the fish, Clarias gariepinus, exposed to mercuric chloride

Mercury Hazards from Gold Mining to Humans, Plants, and Animals

Distribution of mercury in the soft tissues of the blue tilapia Oreochromis aureus (Steindachner) after acute exposure to mercury (II) chloride

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