title: Effects of pollution on chub in the River Elbe, Czech Republic.
abstract: The Elbe River is one of the most polluted aquatic ecosystems in the Czech Republic. The effect of three major chemical plants located on the Elbe River (at Pardubice, Neratovice, and Usti nad Labem) on fish was studied in 2004. Health status, chemical concentrations (Hg, PCB, DDT, HCH, HCB, OCS, 4-tert-nonylphenols, 4-tert-octylphenol) in muscle, and biomarkers (hepatic ethoxyresorufin-O-deethylase (EROD), plasma vitellogenin, and plasma 11-ketotestosterone) were assessed in male chub (Leuciscus cephalus L.). Differences between localities upstream (US) and downstream (DS) from the monitored source of pollution were identified. Fish from DS sampling sites showed significantly higher levels of contaminants than fish from US sampling sites. Generally, the concentrations of pollutants in fish from the Elbe sites were significantly higher compared to the reference site. Reduced gonad size, decreased plasma levels of 11-ketotestosterone, EROD and vitellogenin induction, and histopathologies of male gonads indicated harmful effects of aquatic pollution in fish from the Czech portion of the Elbe River.
authors.affiliation: Research Institute of Fish Culture and Hydrobiology Vodnany, University of South Bohemia Ceske Budejovice, Zatisi 728/II, 398 25 Vodnany, Czech Republic.
authors.forename: T
authors.initials: T
authors.lastname: Randak
authors.forename: V
authors.initials: V
authors.lastname: Zlabek
authors.forename: J
authors.initials: J
authors.lastname: Pulkrabova
authors.forename: J
authors.initials: J
authors.lastname: Kolarova
authors.forename: H
authors.initials: H
authors.lastname: Kroupova
authors.forename: Z
authors.initials: Z
authors.lastname: Siroka
authors.forename: J
authors.initials: J
authors.lastname: Velisek
authors.forename: Z
authors.initials: Z
authors.lastname: Svobodova
authors.forename: J
authors.initials: J
authors.lastname: Hajslova
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000032:analysis / Q000378:metabolism; D003530:Cyprinidae / Q000502:physiology*; D019363:Cytochrome P-450 CYP1A1 / Q000378:metabolism; D018153:Czech Republic; D004784:Environmental Monitoring; D008297:Male; D018482:Muscle, Skeletal / Q000737:chemistry / Q000187:drug effects* / Q000378:metabolism; D009929:Organ Size / Q000187:drug effects; D045483:Rivers / Q000737:chemistry; D013737:Testis / Q000187:drug effects / Q000473:pathology; D013739:Testosterone / Q000031:analogs & derivatives / Q000097:blood; D014819:Vitellogenins / Q000097:blood; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism / Q000633:toxicity*
chemical_list: D015415:Biomarkers; D014819:Vitellogenins; D014874:Water Pollutants, Chemical; D013739:Testosterone; D019363:Cytochrome P-450 CYP1A1; C003600:11-ketotestosterone