| larvivorous potential of fish species found in river bed pools below the major dams in sri lanka. | malaria in sri lanka is closely associated with the river systems in the country. construction of major dams across rivers has resulted in year-round pooling and anopheline mosquito breeding in river beds below the dams. this study was carried out to determine the larvivorous activity of fish found in river bed pools below the dams to identify the potential fish species for anopheline larval control in these areas. fish species in five river beds below the dams, namely, laxapana, kotmale, nilamb ... | 2006 | 16506451 |
| effect of repeated application of fenthion as a mosquito larvicide on nile tilapia (oreochromis niloticus) inhabiting selected water canals in sri lanka. | health status of feral nile tilapia following repeated applications of fenthion as a mosquito larvicide to selected water canals in sri lanka was assessed. with three spray applications of fenthion to the study sites at weekly intervals at the concentration recommended for mosquito control, condition factor and brain acetylcholinesterase activity of the fish were depressed in a time dependent manner. prominent histopathological alterations displayed were gill hyperplasia and telangiectasis and v ... | 2008 | 18344014 |
| use of biomarkers in nile tilapia (oreochromis niloticus) to assess the impacts of pollution in bolgoda lake, an urban water body in sri lanka. | the present study reports the first analysis of water pollutants in sri lankan waters using a suite of biomarkers in nile tilapia (oreochromis niloticus) residing in bolgoda lake which receives urban, industrial and domestic wastes from multiple sources. the fish were collected from the lake in the dry period (april 2005) and wet periods (september 2005, october 2006) and the levels of biomarkers viz. hepatic ethoxyresorufin o-deethylase (erod), glutathione s-transferase (gst), metallothioneins, ... | 2009 | 18688734 |
| assessment of biological effects of pollutants in a hyper eutrophic tropical water body, lake beira, sri lanka using multiple biomarker responses of resident fish, nile tilapia (oreochromis niloticus). | biomarkers measured at the molecular and cellular level in fish have been proposed as sensitive "early warning" tools for biological effect measurements in environmental quality assessments. lake beira is a hypertrophic urban water body with a complex mixture of pollutants including polycyclic aromatic hydrocarbons (pahs) and microcystins. in this study, a suite of biomarker responses viz. biliary fluorescent aromatic compounds (facs), hepatic ethoxyresorufin o-deethylase (erod) and glutathione ... | 2010 | 20229025 |
| body size-related differences in the inhibition of brain acetylcholinesterase activity in juvenile nile tilapia (oreochromis niloticus) by chlorpyrifos and carbosulfan. | influence of body size on inhibition of brain acetylcholinesterase (ache) activity of juvenile nile tilapia, oreochromis niloticus by chlorpyrifos and carbosulfan was investigated concerning its potential use in the biomonitoring of anticholinesterase pesticides in tropical water bodies. three size groups of fish (fry: 3-4 cm, fingerlings: 6-8 cm, sub-adults: 10-12 cm in total length) were exposed to a series of concentrations of chlorpyrifos (0.5-12 microg l(-1)) or carbosulfan (1-10 microg l(- ... | 2007 | 16753212 |
| trace metal concentrations in nile tilapia (oreochromis niloticus) in three catchments, sri lanka. | samples of the muscle and liver of the nile tilapia (oreochromis niloticus) were obtained from a single reservoir in each of three sri lankan catchments (kaudulla, rajanganaya, and udawalawe reservoirs in the mahaweli, kala oya, and walawe ganga river basins, respectively) in 2002. the concentrations of 12 elements were consistently detected in the tilapia muscle and liver (ca, cd, cu, fe, hg, k, mg, mn, na, p, sr and zn). however, a three factorial principal components analysis suggested that t ... | 2009 | 18949439 |