Red crayfish, Procambarus clarkii, is widely farmed in the southern states of Louisiana and Texas. It is the most valuable of commercial crayfish species in the United States, where it is considered a delicacy. In recent years, its availability has decreased due to environmental contamination by toxic chemicals including lead. In the present study, we conducted a ninety-six-hour static renewal ...

The indiscriminate discharge of ballast water into the aquatic environment could bioaccumulate in food chain and pose serious problems for animal human health. Biological monitoring involving use organisms provides good indication environmental pollution by toxic materials wastewaters. In this study, Clarias gariepinus juveniles were exposed to different concentrations under laboratory conditio...

The relative acute toxicity of Dichlorvos and Cypermethrin acting singly against Rainbow crab, Cardiosoma armatum was evaluated. effects sub lethal concentrations the pesticides on oxidative responses histopathological in gills crab were also investigated over a 30 days period. On basis 96 hrs LC50 value, with hr 8.86 ?g/L 2 times more toxic to crabs than 17.80 ?g/L. exposures (1/10th 1/100th L...

the toxicity of 7 herbicides to the three cyanobacteria was tested in this work. the results indicated that: (1) there was a highly significant relationship between dried weight or chlorophyll-a and od680nm for tested cyanobacteria; (2) the toxicity of the tested herbicides with the order from high to low was: photosynthesis-inhibiting > accase inhibitor > protox inhibiting herbicides; (3) the ...

The study to evaluate the toxicity of used drilling muds (drilling wastes) and their impact on gill structure of the post larvae of tiger prawn Penaeus monodon has been done. The results showed that the 96 h LC50 of used drilling muds ranged from 30740 and 78271 ppm SPP. All toxicity values considered to be above the standard of Indonesian government (LC50≤30000 ppm SPP). Histological observati...

POŠTULKOVÁ EVA, KOPP RADOVAN. 2016. Guanicid and PHMG Toxicity Tests on Aquatic Organisms. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 64(1): 129–134. The emergence and development of new algicidal products is caused by the ever increasing popularity of garden ponds as well as the use of these products in the fi sheries sector, especially for disposal of cyanobacteri...

Fasciolosis is a parasitic helminthes disease caused by Fasciola gigantica. The different larval stage (sporocyst, redia and cercaria) are found in intermediate host snail Lymnaea acuminata. In the present study it has been tried to kill the F. gigantica larvae in vitro/ in vivo condition by the use of ferulic acid there is no mortality of snails. Mortality of larvae in in vivo and in vitro con...

according to the increased probability of the presence of nanomaterials in the aquatic ecosystems, the present study examined the toxicity of three engineered silver nanoparticles (agnps) as well as silver ions in the pontogammarus maeoticus, a brackish water benthic organism living in the littoral zone of the caspian sea. the animals were acutely exposed to different concentrations of two comm...