Metabolic Potential in Tissues of the Blue Crab, Callinectes Sapidus
Abstract:The maximal in vitro activities of eight enzymes involved with the metabolism of L-lactate were measured in hepatopancreas, gills, heart, and dark and light levator muscles of the blue crab, Callinectes sapidus. The activities found in both muscle types were similar for all enzymes except for citrate synthase, where dark muscle showed a much greater potential for aerobic metabolism than light muscle, as expected from their structure. Heart tissue showed good potential for both aerobiosis and anaerobiosis. Gills demonstrated relatively low activities for these enzymes of energy metabolism. Hepatopancreas completely lacked LDH activity, although we found activities for other enzymes of glycolytic and gluconeogenic pathways. We conclude that lactate produced by muscles (including the heart) during anaerobiosis may be reoxidized in situ and that the gluconeogenic potential of hepatopancreas and gills appears to be low.
Document Type: Research Article
Publication date: May 1, 1991
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