The effect of tramadol hydrochloride on early life stages of fish.

The aim of this study was to perform the fish embryo acute toxicity test (FET) on zebrafish (Danio rerio) and the early-life stage toxicity test on common carp (Cyprinus carpio) with tramadol hydrochloride. The FET was performed using the method inspired by the OECD guideline 236. Newly fertilized zebrafish eggs were exposed to tramadol hydrochloride at concentrations of 10; 50; 100 and 200μg/l for a period of 144h.

Evaluating environmental impact of STPs situated on streams in the Czech Republic: an integrated approach to biomonitoring the aquatic environment.

Sewage water treatment plants (STPs) are frequently associated with the release of xenobiotics and, consequently, with biological responses of fish to these substances. The impact of three STPs situated on small streams was assessed in 2009. Brown trout (Salmo trutta fario L.

Induction of vitellogenin and gonadal impairment in chub (Leuciscus cephalus L.) after exposure to 17beta-estradiol and testosterone.

Objectives: A controlled laboratory study was carried out to quantify vitellogenin (VTG) concentrations in a common cyprinid freshwater fish, the chub (Leuciscus cephalus L.), exposed to steroid hormones.

Design: The effect of 17betaestradiol, testosterone and testosterone-estradiol mixture was investigated on vitellogenin induction.