Effect of exposure to atmospheric air on blood glucose and lactate concentrations in two crustacean species: A role of the Crustacean hyperglycemic hormone (CHH) |
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| Institution: | 1. Biology Department, Tufts University, Medford, MA 02155, USA;2. Department of Civil and Environmental Engineering, Tufts University, Medford, MA 02155, USA;1. Békésy Laboratory of Neurobiology, Pacific Biosciences Research Center, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, 1993 East-West Road, Honolulu, HI 96822, USA;2. Pest Management and Biocontrol Research Unit, US Arid Land Agricultural Research Center, USDA Agricultural Research Services, Maricopa, AZ 85138, USA;3. Department of Biology, Bowdoin College, 6500 College Station, Brunswick, ME 04672, USA |
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| 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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