Assessing relationships between chemical exposure, parasite infection, fish health, and fish ecological status: a case study using chub (Leuciscus cephalus) in the Bílina River, Czech Republic

0338828 - ÚBO 2010 RIV US eng J - Článek v odborném periodiku
Wenger, M. - Ondračková, Markéta - Machala, M. - Neča, J. - Hyršl, P. - Šimková, A. - Jurajda, Pavel - von der Ohe, P. - Segner, H.
Assessing relationships between chemical exposure, parasite infection, fish health, and fish ecological status: a case study using chub (Leuciscus cephalus) in the Bílina River, Czech Republic.
Environmental Toxicology and Chemistry. Roč. 29, č. 2 (2010), s. 453-466. ISSN 0730-7268. E-ISSN 1552-8618
Grant CEP: GA MŠMT LC522
Grant ostatní: 6th Framework Programme EC(XE) MODELKEY (511237-GOCE)
Program: FP6
Výzkumný záměr: CEZ:AV0Z60930519
Klíčová slova: multiple stressors * environmental risk assessment * exposure biomarkers * parasites * fish health
Kód oboru RIV: GJ - Choroby a škůdci zvířat, veterinární medicína
Impakt faktor: 3.026, rok: 2010

The present study, investigated the chub (L. cephalus), in the Bílina River (CR), which is impacted by various pollution sources and might pose a risk on the fish. It was examined whether there exists an association between chub and exposure to toxic chemicals and parasites. Toxic pressure was assessed by the toxic unit approach, which gives an integrative estimate of toxic effect concentrations and by measuring the biomarkers cytochrome P4501A and vitellogenin. Parasite pressure was estimated by determining abundance and species composition of parasites. Toxic pressure increased in the downstream direction, while parasite intensity decreased in this direction. Health status of chub did not differ clearly between sites. It appears that neither toxic pressure nor parasite pressure nor does their combination translate into a change of chub health status. This study provides evidence against a presumed causative role of toxicants impairing the fish populations of the Bílina River.
Trvalý link: http://hdl.handle.net/11104/0182495