Aerobic and anaerobic enzymatic activities of Calyptogena gallardoi (Vesicomyidae): A clam associated with methane cold seeps off Chile

R. R. González, R. A. Quiñones, EDUARDO JOEL QUIROGA JAMETT, J. Sellanes

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3 Scopus citations

Abstract

Calyptogena gallardoi is a recently described species of vesicomyid clam associated to the extensive gas-hydrate field reported for the Chilean margin along 35°S to 45°S. Enzymatic analysis in foot, gill and abductor muscle tissues of C. gallardoi collected in central-south Chile (∼36°21′ S 73°44′W), show high activities for malate dehydrogenase (MDH), strombine dehydrogenase (STRDH) and alanopine dehydrogenase (ALPDH) and a low activity of citrate synthase (CS) and ETS (electron transport system). Positive significant correlations (log-log scale) were found between enzymatic activities involved in anaerobic metabolism (MDH versus LDH and ALPDH versus STRDH), as well as between CS and opines dehydrogenases. The ratio MDH/LDH or any other opine dehydrogenase assayed was >> 1 in all tissues analysed. These results indicate that C. gallardoi is highly adapted to the harsh anaerobic conditions of marine chemosynthesis-based communities inhabiting a reduced environment.

Original languageEnglish
Pages (from-to)983-986
Number of pages4
JournalJournal of the Marine Biological Association of the United Kingdom
Volume88
Issue number5
DOIs
StatePublished - 1 Aug 2008

Keywords

  • Aerobic
  • Anaerobic
  • Calyptogena gallardoi
  • Chile
  • Enzymes
  • Methane cold seeps

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