scholarly journals Concentrations and Risk Evaluation of Selected Heavy Metals in Water and African Catfish Clarias gariepinus in River Kaduna, Nigeria

2017 ◽  
Vol 4 (1) ◽  
pp. 001-009
Author(s):  
Henry Eric Onyidoh ◽  
◽  
Rasaq Ibrahim ◽  
Falalu Muhammad Ismail ◽  
Ahmad Muhammad Muhammad
Keyword(s):  
Heavy Metals ◽  
Risk Evaluation ◽  
Clarias Gariepinus ◽  
African Catfish

scholarly journals Evaluating the Potential of African Catfish (Clarias gariepinus) to Bioaccumulation of Some Selected Heavy Metals

2013 ◽  
Vol 3 (10) ◽  
pp. 687-691
Author(s):  
Femi Francis Oloye ◽  
◽  
Oluwabunmi Peace Oluyede ◽  
◽  
Keyword(s):  
Heavy Metals ◽  
Clarias Gariepinus ◽  
African Catfish

IN VITRO EFFECT OF PHARMACEUTICAL EFFLUENT ON HAEMATOLOGY AND BIOCHEMICAL RESPONSES IN AFRICAN CATFISH (CLARIAS GARIEPINUS)

2021 ◽  
Vol 4 (4) ◽  
pp. 391-400
Author(s):  
Shafiu Nafiu Abdullahi ◽  
M. Zakariyya ◽  
Z. Y. Hassan ◽  
M. K. Ahmad
Keyword(s):  
Heavy Metals ◽  
Negative Impact ◽  
Clarias Gariepinus ◽  
African Catfish ◽  
Corpuscular Haemoglobin ◽  
Biochemical Alterations ◽  
Experimental Fish ◽  
Mean Corpuscular Haemoglobin ◽  
Vitro Effect

Pharmaceutical effluents collected from Bompai industrial area, Kano State were assessed for their physiochemical parameters, heavy metals and effect on haematology and biochemical changes in Clarias gariepinus. Laboratory analyses were performed using standard methods in a Completely Randomized Design (CRD). Five test solutions of the effluents (0, 25, 50, 75, and 100% v/v) were prepared for LC50 96hr acute toxicity test. The LC50 for 96hr was 48.7% concentration of effluents by volume. Experimental fish were exposed to sublethal concentrations of 0.00% 2.43% (5/100 LC50), 12.17% (25/100 LC50), 24.35% (50/100 LC50) and 36.52% (75/100 LC50) for 28days.  Physicochemical parameters recorded were higher than WHO recommended Standard with the exception of water temperature. Heavy metals concentrations decreased in the order of Cr > Cu > Pd > Cd. Red blood Cells count, haemoglobin concentrations, packed cell volume, lymphocytes and monocytes of the experimental fish decline significantly (p<0.05) when exposed with 2.43, 12.17, 24.35, 36.52% effluents  compared to the control. White blood cell count, mean corpuscular haemoglobin, mean corpuscular volume, mean corpuscular haemoglobin concentrations, neutrophils and eosinophils were significantly higher (P<0.05) than the control. However, a significant increase (P<0.05) in the activities of serum aspartate aminotransferase (AST), Alkaline Phosphatase (ALP) and alanine aminotransferase (ALT) were recorded as the exposure period continued when compared with control. It is concluded that the effluents induces haematological and biochemical alterations. It is therefore recommended that regulatory bodies should adopt holistic approach on the aquatic pollution abatement, bearing in mind the negative impact to non-target organisms.

scholarly journals Enzymes as Biomarkers of Environmental Stress in African Catfish (Clarias gariepinus) in Osun State, Nigeria

2017 ◽  
Vol 7 (14) ◽  
pp. 71-83
Author(s):  
Omolara Titilayo Aladesanmi ◽  
Femi Kayode Agboola ◽  
Rapheal Emuebe Okonji
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Anthropogenic Activities ◽  
Clarias Gariepinus ◽  
Fish Farming ◽  
Fish Tissue ◽  
Enzymatic Activities ◽  
African Catfish ◽  
Fish Ponds ◽  
Bioindicator Species

Background. Many natural aquatic bodies have been contaminated with heavy metals released from domestic, industrial and other anthropogenic activities. Fish are an important bioindicator species and play an important role in the monitoring of water pollution. Objectives. This study shows the effect of heavy metals on the distribution of glutathione S-transferases (GST), catalase, rhodanese and 3-mercaptopyruvate sulphur transferase (3-MST) isolated from the liver, gills, fins and muscle of Clarias gariepinus. Methods . Glutathione S-transferase, catalase, rhodanese and 3-mercaptopyruvate S-transferase enzymes were isolated from the liver and gills of fish by homogenization of each tissue (with specific buffers for each enzyme) and centrifugation. Serial dilutions of the crude enzymes were then assayed for residual enzymatic activities using standard enzyme assay protocol. Results. The results showed heavy metals in the liver and muscle of the investigated fish. This study indicated significant accumulation of heavy metals in the tissues/organ of the fish from Ilesha, Osogbo and Yakoyo fish ponds. These are three main towns in Osun State where the major occupation is fish farming. The relationship between enzymatic activities and heavy metal content in C gariepinus tissue showed positive and significant (p&lt;0.05) correlations between lead (Pb) and GST as well as chromium (Cr) and GST. This implies that higher concentrations of Pb and Cr induced the expression of greater GST activity in the fish tissue. Conclusions. The study concluded that the pattern of response of GST, catalase, rhodanese and 3-MST activities in the various organs/tissues of C gariepinus to the heavy metals suggests that the excitation or inhibitions of their activities are organ specific. Further biochemical studies of fish tissues/organs are needed to characterize the enzymatic changes associated with heavy metal pollution. Competing Interests: The authors declare no competing financial interests

Concentration of Selected Heavy Metals in Sediments and Liver of Wild African Catfish (Clarias gariepinus) in Lake Kanyaboli, Kenya

2016 ◽  
Vol 11 (2) ◽  
pp. 1-8 ◽  
Author(s):  
Omondi Akwiri ◽  
P Raburu ◽  
O Okeyo ◽  
F Ramesh ◽  
F Onyangore
Keyword(s):  
Heavy Metals ◽  
Clarias Gariepinus ◽  
African Catfish

scholarly journals Ionoregulatory Impairment in African Catfish (Clarias gariepinus) Exposed to Combined Stressors of Lead and Cypermethrin

2014 ◽  
Vol 6 (1) ◽  
pp. 27-30
Author(s):  
Omowumi O ADEWALE ◽  
Joseph A ADEYEMI
Keyword(s):  
Heavy Metals ◽  
Multiple Stressors ◽  
Clarias Gariepinus ◽  
Aquatic Organisms ◽  
Fold Increase ◽  
African Catfish ◽  
Water Control ◽  
Aquatic Life ◽  
Significant Difference ◽  
Borehole Water

The contamination of aquatic ecosystem with heavy metals and pesticides has increased dramatically over the years, and this has generated a lot of attention by environmental experts. There are reports on impacts of different single toxicants on aquatic organisms but not much has been done to investigate the impacts of mixtures of toxicants on aquatic life. In this study we investigated the effects of multiple stressors of Pb and cypermethrin on ionoregulation in the African catfish (Clarias gariepinus). Adults C. gariepinus were exposed to either borehole water (control), 2 mg/L Pb, 0.5 μg/L cypermetrin or a mixture of 2 mg/L Pb and 0.5 μg/L cypermethrin for 96 h, after which the levels of plasma Na+, Cl- and K+ were determined as a measure of branchial ionoregulatory disturbance. The exposure of C. gariepinus to 0.5 μg/L cypermethrin resulted in a significant reduction in plasma Na+ (43% decrease) and Cl- (31% decrease) but a 2-fold increase in plasma K+ concentrations. Exposure to a mixture of cypermethrin and Pb resulted in 53% decrease in plasma Na+, 40% decrease in plasma Cl- and a 3- fold increase in plasma K+. There was no significant difference between the control and those exposed to just only 2 mg/L Pb for all the parameters measured. The results of this study indicated that exposure of aquatic organisms to combined stressors of heavy metals pollution as well as pesticide contamination could have a serious effect on the physiology especially on ionic regulation in the exposed fish.

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