Effect of lethal concentrations of selected phosphoro-organic insecticides upon rainbow trout Salmo gairdneri Rich

Abstract

Tests of acute toxicity for rainbow trout fry of chlorfenviphos and bromfenviphos were undertaken in order to establish the Lc 50 values. Studies were also made on the effect of lethal concentrations, corresponding to 24 h LC 50 , upon the activity of selected enzymes and hematological indices. Activity of brain acethylcholinesterase, and blood peroxidase and catalase, was assessed. Hematological studies embraced: content of hemoglobin, hematocrit, number of red and white corpuscles, percentage share of lymphocytes, red/white cell ratio, and MCV, MCH, and MCHC indices.

Cellular changes in the blood and haemopoietic tissues of common carp exposed to sublethal concentration of ammonia

“…The effects of ammonia were manifested also in changes of the quantitative composition of white blood cells in the peripheral blood and haemopoietic organs of carp. Similar lymphocytopenia and leucopenia have been observed in fish from other toxicological experiments (Waluga and Flis, 1971;Piotrowska 1980). Such changes in the blood picture are recognised as effects of stress on fish immune systems (Pcters and Schwarzer, 1985;Angelidis et al, 1987).…”