The reduction of CuSO‚„ toxicity in common carp (Cyprinus carpio Linnaeus 1758) after pre-exposure to CaCO‚

Bahrekazemi Masoumeh, . and Ghasemzadeh Akram, . The reduction of CuSO‚„ toxicity in common carp (Cyprinus carpio Linnaeus 1758) after pre-exposure to CaCO‚. pp. 111-116. ISSN 0116-6514

Appropriate usage of CuSO‚„ as a herbicide with no toxicity mainly depends on water calcium hardness. This study aims to investigate the effect of initial exposure to CaCO‚ for the reduction of CuSO‚„ toxicity in Cyprinus carpio (Linnaeus 1758). One group of 300 fish (6 0.05 g) were placed in a tank containing 200 mg.L of CaCO‚ for 2 weeks while another group of 300 fish was maintained at normal conditions. All 600 fish were then exposed to CuSO‚„ at 0.0 1.5 and 3.0 mg.L for 60 days so that the fish weight length and condition factor decreased significantly at increasing CuSo‚„ with higher values seen in the fish pre-exposed to calcium (P 0.01). The highest mortality was observed in 3 mg.L of copper treatment without calcium exposure. The feed conversion ratio was elevated with an increase copper concentration. Also the red and white blood cells haemoglobin and haematocrit decreased significantly (P 0.05) at increasing copper concentration in the group that were pre-exposed to calcium. The amount of copper in muscle was elevated at increasing copper concentration but was less in the group pre-exposed to CaCO‚. Thus preexposure to CaCO‚ could reduce copper toxicity especially at low concentrations of CuSO‚„.

Full text available from: Official URL: http://www.asianfisheriessociety.org/publication/d...

Abstract

Appropriate usage of CuSO‚„ as a herbicide with no toxicity mainly depends on water calcium hardness. This study aims to investigate the effect of initial exposure to CaCO‚ for the reduction of CuSO‚„ toxicity in Cyprinus carpio (Linnaeus 1758). One group of 300 fish (6 0.05 g) were placed in a tank containing 200 mg.L of CaCO‚ for 2 weeks while another group of 300 fish was maintained at normal conditions. All 600 fish were then exposed to CuSO‚„ at 0.0 1.5 and 3.0 mg.L for 60 days so that the fish weight length and condition factor decreased significantly at increasing CuSo‚„ with higher values seen in the fish pre-exposed to calcium (P 0.01). The highest mortality was observed in 3 mg.L of copper treatment without calcium exposure. The feed conversion ratio was elevated with an increase copper concentration. Also the red and white blood cells haemoglobin and haematocrit decreased significantly (P 0.05) at increasing copper concentration in the group that were pre-exposed to calcium. The amount of copper in muscle was elevated at increasing copper concentration but was less in the group pre-exposed to CaCO‚. Thus preexposure to CaCO‚ could reduce copper toxicity especially at low concentrations of CuSO‚„.

[error in script]

Item Type:	Article
AGROVOC Term:	Carp
AGROVOC Term:	Cyprinus
AGROVOC Term:	Cyprinus carpio
AGROVOC Term:	Fishes
AGROVOC Term:	Blood cells
AGROVOC Term:	Calcium
AGROVOC Term:	Copper
AGROVOC Term:	Feed conversion efficiency
AGROVOC Term:	Haematocrit
AGROVOC Term:	Haematology
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/8669

Actions (login required)

View Item