LIPID AND CARBOHYDRATE-METABOLISM OF THE INTERTIDAL CRAB CHASMAGNATHUS-GRANULATA DANA, 1851 (CRUSTACEA, DECAPODA) DURING EMERSION

1. Lipid, glucose and glycogen concentrations were measured in differe nt tissues of the crab Chasmagnathus granulata during emersion. 2. Aft er 6 hr of emersion no reduction in the total amount of carbohydrates was found to occur, suggesting that a general metabolic arrest was tak ing place.3. A transitory increase in haemolymphatic glucose and lipid levels was observed. Possible causes are therefore discussed in relat ion to changes in the flux of substrates for energy production. 4. The mobilization of carbohydrates and lipids to the gills, observed only during summer, may be concerned with energy supplying for ionic regula tion.