Abstract
1. 1. In intact (control) crabs ( Carcinus maenas) and crayfish ( Orconectes limosus) a significant ( P < 0.01) increase in both glucose and lactate concentrations in the blood was observed after exposure to air. Such changes were not observed in either eyestalk-less or eyestalk-less and saline injected animals ( P > 0.05). 2. 2. Injections of Crustacean hyperglycemie hormone (CHH) into eyestalk-less animals before exposure to air were able to reverse the effects of eyestalk ablation, i.e., significant increases ( P < 0.01) in blood glucose and lactate could again be observed. 3. 3. Significant hyperglycemia ( P < 0.01), but no changes in lactate concentration ( P > 0.05), was observed after injection of CHH in eyestalk-less submerged animals. 4. 4. These results suggest that the increase in glycolysis after air exposure is facilitated by CHH, possibly by increased substrate availability due to glycogen degradation.
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