background: paraquat dichloride is a highly toxic herbicide which is still used in many developing countries. african cat fish (clarias gariepinus) is a commercially important species in many countries and was selected assess accumulation and elimination of paraquat dichloride in its tissues. methods: groups of ten fish with equal lengths and weights were exposed to varying concentrations of pa...

Heavy metals are considered as the most important pollutants of the aquatic environment. In the present study, acute toxicity test was used for the determination of lethal toxicity of Nickel in adult fish, Channa gachua as the test organism. Toxicity test is most reliable for accessing the adverse effect of pollutants on aquatic life. The LC50 values were determined and observed that the values...

Personal care products (PCPs) are among the most commonly detected compounds in surface water. PCPs have used large amount of metal and metal oxide nanoparticles (NPs). In the present study an attempt was made to study the bioaccumulation and biochemical constituents changes in gill tissues of a freshwater fish labeo rohita exposed to metal and metal oxide nanoparticles in domestic wastewater c...

This study aims to investigate the bioaccumulation Tissues. The experiment was carried on for 28 days, meanwhile sampling fish weekly. With continued exposure, the accumulations were increased and fish progressively lost their ability to respond to this increase in exposure period. The control group displayed normal behavior during the test period. The lowest concentrations (10 and 15 mg/L Cr6+...

In this study the efficacy of bacterial culture, simple PCR and nested-PCR techniques for the detection of Yersinia ruckeri in tissues of naturally and experimentally infected rainbow trout (Oncorhynchus mykiss) fry was compared. In order to detect Y. ruckeri in naturally infected rainbow trout tissues, 30 fish suspected of enteric redmouth disease were randomly collected from 6 rainbow trout f...

Microbial communities play important roles in the functioning of coral reef communities. However, extensive autofluorescence of coral tissues and endosymbionts limits the application of standard fluorescence in situ hybridization (FISH) techniques for the identification of the coral-associated bacterial communities. This study overcomes these limitations by combining FISH and spectral imaging.