Hematological and immunological responses in the African catfish Clarias gairepinus exposed to sublethal concentrations of herbicide Ronstar®.

Autor: Oluah NS; Ecotoxicology Research Unit, Aquaculture and Marine Science Programme, Department of Zoology and Environmental Biology, University of Nigeria, Nsukka, Nigeria. Electronic address: ndubuisi.oluah@unn.edu.ng., Aguzie IO; Ecotoxicology Research Unit, Aquaculture and Marine Science Programme, Department of Zoology and Environmental Biology, University of Nigeria, Nsukka, Nigeria., Ekechukwu NE; Ecotoxicology Research Unit, Aquaculture and Marine Science Programme, Department of Zoology and Environmental Biology, University of Nigeria, Nsukka, Nigeria., Madu JC; Ecotoxicology Research Unit, Aquaculture and Marine Science Programme, Department of Zoology and Environmental Biology, University of Nigeria, Nsukka, Nigeria., Ngene CI; Ecotoxicology Research Unit, Aquaculture and Marine Science Programme, Department of Zoology and Environmental Biology, University of Nigeria, Nsukka, Nigeria., Oluah C; Department of Medical Biochemistry, College of Medicine, University of Nigeria, Enugu Campus, Nigeria.
Jazyk: angličtina
Zdroj: Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2020 Sep 15; Vol. 201, pp. 110824. Date of Electronic Publication: 2020 Jun 13.
DOI: 10.1016/j.ecoenv.2020.110824
Abstrakt: The aim of the study was to investigate the effects of sublethal concentrations (0.3, 0.6 and 1.2 mg L -1 ) of the herbicide Ronstar on the hematology and some immune parameters in Clarias gariepinus juvenile (mean weight and length 58.72 ± 2.46 g and 27.60 ± 1.62 cm, respectively). The hematological and some immune parameters were studied for 21 days in a static renewal bioassay system in which the water and the herbicide were changed daily. The erythrocyte count, hemoglobin concentration (Hb), and packed cell volume (PCV) were significantly (p < 0.05) reduced in the treatment groups. When compared with the control, there were significant (p < 0.05) leucocytosis, lymphocytosis, neutropenia and monocytopenia in the treatment groups. Both the mean corpuscular hemoglobin (MCH) and mean corpuscular volume (MCV) were reduced ((p < 0.05) in the Ronstar-exposed fish. The result showed that the treated fish suffered hypochromic microcytic anemia. The total immunoglobulin and phagocytic indices (phagocytic capacity and phagocytic index) were significantly (p < 0.05) reduced in the treatment groups. while the respiratory burst was significantly (p < 0.05) increased in the treatment groups. The result showed that exposure to Ronstar had adverse effects on the hematology and immunocompetency of the fish.
Competing Interests: Declaration of competing interest The authors have no conflict of interest to declare.
(Copyright © 2020 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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