Journal of Global Ecology and Environment

Lamellidens marginalis, a freshwater bivalve, was experimentally exposed to 1/4^th and 1/10^th sublethal concentrations of oil effluent to examine the filtration rate, oxygen uptake, and glycogen level of foot, gill, and digestive gland tissues for healthy assessment for reuse in oil effluent intoxicated aquatic environments. The treated group's oxygen uptake was higher than the control group's by (10.43±3.476 ml oxygen/hr) in 1/4^th and (11.37±3.790 ml oxygen/hr) in 1/10^th exposures, which peaked at 48 hours and then declined. The concentrations of oil effluent exposure gradually increased and peaked at (205± 68.344 ml oxygen/hr) 72 hours in 1/4^th and (172± 57.346 ml oxygen/hr) 42 hours in 1/10^th concentrations, followed by a moderate decline trend.When compared to the control of all hours, oil effluent uptake peaked at 84 hours in 1/4^th foot tissues (512±170.675 µg g-1);1/10^th foot tissues (498±166.014µg g-1); 1/4^th gill tissues (516±172.013 µg g-1); 1/10^th gill tissues (464±154.69µg g-1) and 1/4^th digestive gland tissues (540±180.012 µg g-1); 1/10^th digestive gland tissues (522±174.03 µg g-1) of freshwater mussel.Mean glycogen concentrations ranged from 1.934 mg to 3.262 mg/g wet tissue in 1/4^th and 2.318 mg to 3.286 mg/g wet tissue in 1/10^th of sublethal exposures in foot tissues; 1.705 mg to 3.579 mg/g wet tissue in 1/4^th and 2.324 mg to 3.074 mg/g wet tissue in 1/10^th of exposures in gill tissues ;1.852 mg to 3.314 mg/g wet tissue in 1/4^th and 1.989 mg to 3.364 mg/g wet tissues in 1/10^th of exposures in digestive gland tissues. Our study concluded that the freshwater bivalve, L.marginalis can be used as biomarkers for animal health assessment and provide a new opportunity for researching the energetic reserves and health status of freshwater mussels.