title: Comparisons of the metabolic responses of two subtidal nassariid gastropods to hypoxia and re-oxygenation.
abstract: Changes in the levels of carbohydrate, lipid, protein and anaerobic metabolites (succinate, lactate, acetate, fumarate and propionate), upon exposure to hypoxia (1.5 mg O2 l(-1)) and after reoxygenation in subtidal gastropods Nassarius siquijorensis and N. conoidalis, were compared. A significant decrease of the glycogen content was observed under hypoxia in N. conoidalis but not in N. siquijorensis. A greater increase in the concentrations of anaerobic metabolites was observed in N. conoidalis under hypoxia, and their levels did not return to baseline after returning to normoxia for 24h. In contrast, a lower rate of accumulation of the metabolites was observed in N. siquijorensis, and complete recovery from anaerobic metabolism was observed after reoxygenation. The results lend further support to the role of hypoxia in governing the different distributional patterns between the two subtidal gastropods in Hong Kong waters.
authors.affiliation: Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong.
authors.forename: C C
authors.initials: CC
authors.lastname: Liu
authors.affiliation: Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong; State Key Laboratory in Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong.
authors.forename: P K S
authors.initials: PK
authors.lastname: Shin
authors.affiliation: Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong; State Key Laboratory in Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong. Electronic address: bhsgche@cityu.edu.hk.
authors.forename: S G
authors.initials: SG
authors.lastname: Cheung
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D001481:Basal Metabolism; D049851:Gastropoda / Q000502:physiology*; D006723:Hong Kong; D009043:Motor Activity; D010100:Oxygen / Q000378:metabolism*; D013045:Species Specificity
chemical_list: D010100:Oxygen
keywords: Anaerobic metabolites; Glycogen; Hypoxia; Lipid; Nassarius; Reoxygenation