title: The use of respiratory enzymes as biomarkers of petroleum hydrocarbon exposure in Mytilus edulis planulatus.
abstract: The effect of exposure to petroleum hydrocarbons via the water column and through contaminated sediment upon changes in respiratory enzymes in the common mussel (Mytilus edulis planulatus) was investigated. Mussels were exposed to three concentrations of the water-accommodated fraction (WAF) of Bass Strait crude oil, for 24, 48, and 96 h. In a second study mussels were exposed to three concentrations of crude oil-contaminated sediment for 2 weeks and 1, 2, 4 and 6 months. Activities of citrate synthase (CS) and lactate dehydrogenase (LDH) were measured in the gills. In mussels exposed to WAF, a significant decrease in CS activity was observed over time (P<0.05), whereas treatment did not cause a significant change in CS activity (P>0.05); neither treatment nor time had an effect on LDH activity. Exposure to contaminated sediment did not have a significant effect on CS activity, however, time had a significant effect on CS activity (P<0.05). Both time and treatment had an effect on LDH activity (P<0.05). Results demonstrated that changes in gill CS and LDH are not sensitive biomarkers of petroleum hydrocarbon exposure in M. edulis planulatus.
authors.affiliation: Department of Biotechnology and Environmental Biology, RMIT-University, Bundoora Campus, GPO Box 71, Victoria 3083, Australia. slon@ceh.ac.uk
authors.forename: Sara M
authors.initials: SM
authors.lastname: Long
authors.forename: Kelly J
authors.initials: KJ
authors.lastname: Ryder
authors.forename: Douglas A
authors.initials: DA
authors.lastname: Holdway
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000032:analysis*; D049872:Bivalvia / Q000201:enzymology*; D002950:Citrate (si)-Synthase / Q000032:analysis / Q000494:pharmacology*; D004781:Environmental Exposure; D019015:Geologic Sediments / Q000737:chemistry; D006838:Hydrocarbons / Q000009:adverse effects / Q000032:analysis; D007770:L-Lactate Dehydrogenase / Q000032:analysis / Q000494:pharmacology*; D010578:Petroleum / Q000009:adverse effects* / Q000032:analysis; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000009:adverse effects* / Q000032:analysis
chemical_list: D015415:Biomarkers; D006838:Hydrocarbons; D010578:Petroleum; D014874:Water Pollutants, Chemical; D007770:L-Lactate Dehydrogenase; D002950:Citrate (si)-Synthase