In this study the LC50 96h values of water-soluble fractions (WSF) of the Caspian Sea ? exploited crude oil were determined in beluga, Huso huso fingerlings. The fingerlings averaged 2.42 ? 0.11 g in weight were exposed to WSF crude oil at concentrations 24.75, 27, 29.25, 31.5, 33.75, 36, 38.25 ppm. The treatments were performed in three replicates and all changes in the specimens were determin...

Pollution of water resources is a serious and growing problem, despite the existence of relevant legislations. Genotoxic studies on industrial pollutants are very important as they tend to accumulate in aquatic animals. Thus use of aquatic organisms to detect the genotoxicity is very useful in environment monitoring. For this chromosomal aberration test was employed to study genotoxicity caused...

the need of aquarists for proper and safe disinfection of fish with chloramine-t (cl-t) necessitates toxico/pathologic examinations.   this study assays toxicity level of cl-t and histopathologic changes of gills, liver, kidney and brain of treated zebrafish (danio rerio). groups of 10 zebrafish were treated with 0 (control), 5, 10, 15, 30, 50,100 and 200 mg/l of cl– t. mortality was recorded a...

The need of aquarists for proper and safe disinfection of fish with Chloramine-T (CL-T) necessitates toxico/pathologic examinations.   This study assays toxicity level of CL-T and histopathologic changes of gills, liver, kidney and brain of treated zebrafish (Danio rerio). Groups of 10 Zebrafish were treated with 0 (control), 5, 10, 15, 30, 50,100 and 200 mg/L of CL– T. Mortality was recorded a...

This study evaluated the sensitivity of male and female guppies (Poecilia reticulata) to ammonia. LC50-96h for males, females combined sexes P. reticulata was 37.33, 48.34, 42.45 mg/L total ammonia or 1.03, 1.34, 1.17 un-ionized The mortality at concentration 40 differed between with higher in males. These results have implications production systems, since recommendations toxicity reference va...

The objective of this study was to determine the toxicity of the neem biopesticide azadirachtin (NEEM-ON, Brand name) on the freshwater fish ‘Labeo rohita’. Fishes were exposed to various concentrations of botanical insecticide azadirachtin for 96 h and the percent mortality was recorded. The 96h LC50 value determined by Finney’s Probit Analysis Method was found to be 42.66 ppm. Behavioural pat...

Like other organophosphates, dimethoate is an acetylcholinesterase inhibitor which disables cholinesterase, enzyme essential for central nervous system function. Dimethoate insecticide can be used both indoor and outdoor purposes to eliminate a number of insect pests under different condition. Dimethoate, one the most extensively studied pesticides, may induce many significant changes in fishes...