Integrated biomarker response to assess the effects of pesticide residues on Nile Tilapia in aquatic ecosystems contaminated by cotton-field effluents.
Biomarker; Cages; Enclosures; In situ study; Nile tilapia; Pesticides; General Medicine; General Chemistry; Environmental Chemistry; Environmental Engineering; Pollution; Health, Toxicology and Mutagenesis; Public Health, Environmental and Occupational Health
Abstract :
[en] An in-situ study combined with an integrated biomarker response was used to evaluate the impact of agricultural effluents in the physiological responses of Nile tilapia reared in cages and enclosures of water reservoirs in North Benin. Fish were distributed in fish farming systems at two sites: Songhai located outside the cotton basin and Batran located in the most productive commune. They were sampled for blood and organs before (BST), during (DST) and after (AST) pesticide treatment. Pesticide residues were analysed in water, sediments and fish muscles. Several biomarkers were investigated related to the immune (peroxidase, lysozyme and complement activities, superoxide anion production) and reproductive (sex steroids and vitellogenin levels) responses as well as neurotoxicity (cholinesterase activity) and tissue alterations. Biomarkers were assessed and analysed via the integrated biomarker response (IBR). The results showed that Batran water reservoir was a more harmful ecosystem for fish than Songhai one, especially by depressing some immune and reproductive functions in relation to a higher-level of pesticide contamination. They also demonstrated that the contact of fish to sediments in enclosures aggravated the pesticide burden on fish. Therefore, using males as bioindicators would improve the sensitivity of the used biomarkers since males seemed more affected than females especially due to pesticide estrogenic induction impacting their reproductive system.
Research center :
FARAH. Santé publique vétérinaire - ULiège
Disciplines :
Food science
Author, co-author :
Guedegba, Nicresse Léa; Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth & Environment (ILEE), University of Namur, 61 rue de Bruxelles, 5000, Namur, Belgium, Research Laboratory in Aquaculture and Aquatic Ecotoxicology (LaRAEAq), University of Parakou, Faculty of Agronomy, 03 BP 61 Parakou-University, Benin. Electronic address: patrick.kestemont@unamur.be
Ammar, Imen Ben; Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth & Environment (ILEE), University of Namur, 61 rue de Bruxelles, 5000, Namur, Belgium. Electronic address: imen.benammar@yahoo.fr
Houndji, Alexis; Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth & Environment (ILEE), University of Namur, 61 rue de Bruxelles, 5000, Namur, Belgium, Research Laboratory in Aquaculture and Aquatic Ecotoxicology (LaRAEAq), University of Parakou, Faculty of Agronomy, 03 BP 61 Parakou-University, Benin
Toko, Ibrahim Imorou ; Research Laboratory in Aquaculture and Aquatic Ecotoxicology (LaRAEAq), University of Parakou, Faculty of Agronomy, 03 BP 61 Parakou-University, Benin
Van De Merckt, Lara; Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth & Environment (ILEE), University of Namur, 61 rue de Bruxelles, 5000, Namur, Belgium
Agbohessi, Prudencio Tachégnon; Research Laboratory in Aquaculture and Aquatic Ecotoxicology (LaRAEAq), University of Parakou, Faculty of Agronomy, 03 BP 61 Parakou-University, Benin
Mandiki, Syaghalirwa N M; Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth & Environment (ILEE), University of Namur, 61 rue de Bruxelles, 5000, Namur, Belgium
Scippo, Marie-Louise ; Université de Liège - ULiège > Fundamental and Applied Research for Animals and Health (FARAH) > FARAH: Santé publique vétérinaire ; Université de Liège - ULiège > Département de sciences des denrées alimentaires (DDA) > Analyse des denrées alimentaires
Kestemont, Patrick; Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth & Environment (ILEE), University of Namur, 61 rue de Bruxelles, 5000, Namur, Belgium
Language :
English
Title :
Integrated biomarker response to assess the effects of pesticide residues on Nile Tilapia in aquatic ecosystems contaminated by cotton-field effluents.
