title: Effects of cyhalothrin-based pesticide on early life stages of common carp (Cyprinus carpio L.).
abstract: The effects of Nexide (a.i. gamma-cyhalothrin 60 g L(-1)) on cumulative mortality, growth indices, and ontogenetic development of embryos and larvae of common carp (Cyprinus carpio L.) were studied. Levels of oxidative stress parameters glutathione reductase (GR), glutathione peroxidase (GPx), catalase (CAT), glutathione-S-transferase (GST), and lipid peroxidation were determined. Eggs of newly fertilised common carp were exposed to Nexide at concentrations 5, 25, 50, 100, and 250  μ g L(-1) (0.3, 1.5, 3, 6, and 15  μ g L(-1) gamma-cyhalothrin). All organisms exposed to concentrations higher than 50  μ g L(-1) died soon after hatching; at 25  μ g L(-1), 95% mortality was recorded. Larvae exposed to 5  μ g L(-1) showed significantly lower growth and retarded ontogenetic development compared to control. Histological examination of the livers of larvae from the exposed group revealed dystrophic changes. The value of detoxification enzyme GST of organisms from the exposed group was significantly higher compared to the control and the value of defensive enzyme GPx was significantly lower compared to the control. The results of our investigation confirmed that contamination of aquatic environment by pesticides containing cyhalothrin may impair growth and development of early life stages of carp and cause disbalance of defensive enzymes.
authors.affiliation: Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, University of South Bohemia in Ceske Budejovice, Zatisi 728/II, 389 25 Vodnany, Czech Republic.
authors.forename: Zuzana
authors.initials: Z
authors.lastname: Richterová
authors.affiliation: Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, University of South Bohemia in Ceske Budejovice, Zatisi 728/II, 389 25 Vodnany, Czech Republic.
authors.forename: Jana
authors.initials: J
authors.lastname: Máchová
authors.affiliation: Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, University of South Bohemia in Ceske Budejovice, Zatisi 728/II, 389 25 Vodnany, Czech Republic.
authors.forename: Alžběta
authors.initials: A
authors.lastname: Stará
authors.affiliation: Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, University of South Bohemia in Ceske Budejovice, Zatisi 728/II, 389 25 Vodnany, Czech Republic.
authors.forename: Jitka
authors.initials: J
authors.lastname: Tumová
authors.affiliation: Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, University of South Bohemia in Ceske Budejovice, Zatisi 728/II, 389 25 Vodnany, Czech Republic.
authors.forename: Josef
authors.initials: J
authors.lastname: Velíšek
authors.affiliation: Department of Veterinary Public Health and Toxicology, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho trida 1/3, 612 42 Brno, Czech Republic.
authors.forename: Marie
authors.initials: M
authors.lastname: Sevčíková
authors.affiliation: Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, University of South Bohemia in Ceske Budejovice, Zatisi 728/II, 389 25 Vodnany, Czech Republic.
authors.forename: Zdeňka
authors.initials: Z
authors.lastname: Svobodová
mesh_terms: D000818:Animals; D002347:Carps / Q000196:embryology* / Q000254:growth & development*; D004305:Dose-Response Relationship, Drug; D047108:Embryonic Development / Q000187:drug effects*; D007928:Lethal Dose 50; D008018:Life Cycle Stages / Q000187:drug effects*; D015227:Lipid Peroxidation / Q000187:drug effects; D009570:Nitriles / Q000008:administration & dosage / Q000633:toxicity*; D018384:Oxidative Stress / Q000187:drug effects*; D010575:Pesticides / Q000633:toxicity; D011722:Pyrethrins / Q000008:administration & dosage / Q000633:toxicity*; D013534:Survival; D014874:Water Pollutants, Chemical / Q000008:administration & dosage / Q000633:toxicity*
chemical_list: D009570:Nitriles; D010575:Pesticides; D011722:Pyrethrins; D014874:Water Pollutants, Chemical; C037304:cyhalothrin