Hepatic biomarker responses to organic contaminants in feral chub (Leuciscus cephalus)--laboratory characterization and field study in the Sava River, Croatia.

As a widely spread cyprinid fish species, the European chub (Leuciscus cephalus) has been used extensively in biomonitoring programs. However, no laboratory dose-response and/or time course studies related to applied biomarkers have been reported on chub yet. In order to address this issue, specimens of juvenile chub caught in September 2005 in the Sava River, Croatia, were laboratory exposed to various (0.