Acute Toxicity of Copper and Zinc and their Lethal Concentration on Clarias Gariepinus (Cat Fish)

Chidiebere, Edeh Emmanuel

doi:10.26717/bjstr.2019.17.003076

Cited by 3 publications

(1 citation statement)

References 40 publications

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“…However, Serezli et al, (2011) observed that TEC in Salmo coruhen sis exp osed to h igh concentration of Pb salt shows a significant depletion only after 48 hrs of treatment though a rise was noticed in TEC during short term treatment. W hereas, Chidiebere et al,(2019) reported that fishes were seen swimming to the surface frequently with their opercula and mouths moving rapidly when exposed to different concentrations of Cu and Zn salts and concluded that this is an indication that toxic effects of the heavy metals caused the depletion of Oxygen content of the medium.…”

Section: Resultsmentioning

confidence: 99%

Toxic Impact of Zinc Salt (ZnSO4) on Some Haematological Parameters in a Freshwater Mud Eel Amphipnous cuchia (Hamilton, 1822)

Sinha

Kumari

2020

ASD

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Background: Zinc (Zn), a heavy metal present in aquatic environment, has toxic effect on fishes. Present study was to assess toxicity of Zinc salt (ZnSO4) on total erythrocyte count (TEC), haemoglobin (Hb) content (g/dl) and haematocrit value (PCV%) of blood of freshwater mud eel Amphipnous cuchia. Methods: Live fishes collected from ponds were acclimatized in laboratory. TEC, Hb content and PCV% of blood samples collected after 15, 30, 60 and 90 days, of control fishes and fishes exposed to low (0.5mg/l) and high (1mg/l) concentrations of ZnSO4, were determined by standard methods. Result: TEC, Hb content and PCV% varied respectively from 2.48 x 106/mm3 to 2.70 x 106/mm3, 12.02 g/dl to 12.30 g/dl and 28.50 % to 33.60 % in fishes in low and from 2.36 x 106/mm3 to 2.60 x 106/mm3, 11.82 g/dl to 12.20 g/dl and 26.20 % to 31.50 % in fishes in high concentration of ZnSO4 solution, showing decreasing trend in all three blood parameters vis-a-vis their control values viz. TEC (2.74 x 106/mm3), Hb content (12.60 g/dl) and PCV% (34.50 %), decrease being more prominent in fishes exposed to high than those to low concentration. The depletion in these blood parameters may be attributed to the haemotoxic characteristics of Zinc (Zn).

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Section: Resultsmentioning

confidence: 99%

Toxic Impact of Zinc Salt (ZnSO4) on Some Haematological Parameters in a Freshwater Mud Eel Amphipnous cuchia (Hamilton, 1822)

Sinha

Kumari

2020

ASD

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Long-Term Consequences of the Effect of Copper and an Electromagnetic Field on the Size and Weight Parameters and Activity of Digestive Glycosidases in Underyearlings of Roach Rutilus rutilus

et al. 2021

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Effects of Zn-EDTA on the health and welfare of the African catfish, Clarias gariepinus (Burchell, 1822), in a recirculating aquaculture system

Hildebrand,

Rebl,

Goldammer

et al. 2024

Front. Aquac.

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As nutrient-rich water in aquaponic systems cannot supply growing plants with all the required trace elements, supplementation with specific fertilizers is performed to make up for this deficit. While chelated fertilizers such as ethylenediaminetetraacetic acid–zinc disodium complex (Zn-EDTA) are becoming more popular in this context for improving plant growth in aquaponic systems, little is known about their effects on fish. During two experiments, a total of 576 individuals of catfish fry (0.19 g) and fingerlings (220.01 g) of the African catfish (Clarias gariepinus; Burchell, 1822) were kept separately for 32 days under experimental aquarium conditions. The fry was exposed to 0.125 and 0.5 mg/L, while the fingerlings were exposed to 0.5 and 2.0 mg/L Zn-EDTA in a plantless aquaponic system. The third treatment group consisted of a control group without Zn-EDTA. The growth, mortality, and ethological indicators were assessed for all growth stages, while the leukocyte distribution and histopathological changes were additionally determined for the fingerlings. As the feed intake in the experiment was limited, the investigations were focused on the effects of Zn-EDTA and not on the growth process of a respective fish growth stage. While the growth, mortality, and behavior were not significantly different in both growing stages, the number of mature neutrophils changed significantly in all treatments in fingerlings. Zn was not detected in the histologically investigated organs at the tested concentrations using the staining method. However, morphological alterations of the gill epithelium were found on the secondary lamellae. Quantitative multiplex PCR was used to simultaneously evaluate the expression of 17 genes related to Zn metabolism and stress physiology in head kidney samples. The transcripts of several selected genes changed by up to 70-fold. Due to high individual variances, only the copy numbers of the KMT2A (lysine-specific methyltransferase 2a) gene were significantly different across treatment groups and sampling points. However, the present results indicate that the addition of Zn-EDTA at the tested concentrations can be considered relatively benign for the health and welfare of C. gariepinus, as no toxic effects of Zn-EDTA were observed in moderately hard to hard water.

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Acute Toxicity of Copper and Zinc and their Lethal Concentration on Clarias Gariepinus (Cat Fish)

Cited by 3 publications

References 40 publications

Toxic Impact of Zinc Salt (ZnSO4) on Some Haematological Parameters in a Freshwater Mud Eel Amphipnous cuchia (Hamilton, 1822)

Toxic Impact of Zinc Salt (ZnSO4) on Some Haematological Parameters in a Freshwater Mud Eel Amphipnous cuchia (Hamilton, 1822)

Long-Term Consequences of the Effect of Copper and an Electromagnetic Field on the Size and Weight Parameters and Activity of Digestive Glycosidases in Underyearlings of Roach Rutilus rutilus

Effects of Zn-EDTA on the health and welfare of the African catfish, Clarias gariepinus (Burchell, 1822), in a recirculating aquaculture system

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