title: Combined effects of toxic cyanobacteria Microcystis aeruginosa and hypoxia on the physiological responses of triangle sail mussel Hyriopsis cumingii.
abstract: The single and combined effects of toxic cyanobacteria Microcystis aeruginosa and hypoxia on the energy budget of triangle sail mussel Hyriopsis cumingii were determined in terms of scope for growth (SfG). Mussels were exposed to different combinations of toxic M. aeruginosa (0%, 50%, and 100% of total dietary dry weight) and dissolved oxygen concentrations (1, 3, and 6.0mg O2l(-1)) with a 3×3 factorial design for 14 days, followed by a recovery period with normal conditions for 7 days. Microcystin contents in mussel tissues increased with the increase in the exposed M. aeruginosa concentration at each sampling time. Adverse physiological responses of H. cumingii under toxic M. aeruginosa and hypoxic exposure were found in terms of clearance rate, absorption efficiency, respiration rate, excretion rate, and SfG. Results emphasized the importance of combined effects of hypoxia and toxic cyanobacteria on H. cumingii bioenergetic parameters, highlighted the interactive effects of toxic algae and hypoxia, and implied that the two stressors affected H. cumingii during the exposure period and showed carryover effects later. Thus, if H. cumingii is used as a bioremediation tool to eliminate M. aeruginosa, the waters should be oxygenated.
authors.affiliation: College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai 201306, China; Shanghai University Knowledge Service Platform, Shanghai Ocean University Aquatic Animal Breeding Center (ZF1206), Shanghai 201306, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou 310058, China.
authors.forename: Menghong
authors.initials: M
authors.lastname: Hu
authors.affiliation: College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China.
authors.forename: Fangli
authors.initials: F
authors.lastname: Wu
authors.affiliation: College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China.
authors.forename: Mingzhe
authors.initials: M
authors.lastname: Yuan
authors.affiliation: College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai 201306, China; Shanghai University Knowledge Service Platform, Shanghai Ocean University Aquatic Animal Breeding Center (ZF1206), Shanghai 201306, China.
authors.forename: Qigen
authors.initials: Q
authors.lastname: Liu
authors.affiliation: College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai 201306, China; Shanghai University Knowledge Service Platform, Shanghai Ocean University Aquatic Animal Breeding Center (ZF1206), Shanghai 201306, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou 310058, China. Electronic address: youjiwang2@gmail.com.
authors.forename: Youji
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000818:Animals; D049872:Bivalvia / Q000187:drug effects* / Q000502:physiology; D005247:Feeding Behavior / Q000187:drug effects; D052998:Microcystins / Q000493:pharmacokinetics / Q000633:toxicity*; D046931:Microcystis; D010100:Oxygen / Q000032:analysis* / Q000378:metabolism; D014018:Tissue Distribution
chemical_list: D052998:Microcystins; C078588:microcystin; D010100:Oxygen
keywords: Hypoxia; Hyriopsis cumingii; Physiological activity; Toxic cyanobacteria; Triangle sail mussel