Jackson Estuarine Laboratory

Physiology of hemolymph, gut fluid, and hepatopancrease of the land crab Gecarcinus lateralis (fréminville) in various neuroendocrine states


1. Speciemens of Gecarcinus lateralis were studied in varied neuroendocrine states: i.e. crabs with eyestalks in intermolt and at echysis, destalked crabs at ecdysis and destalked crabs, thoracic ganglionic mass (TGM)-implaneted, at ecdysis.

2. Protein in hemolymph is significantly decreased in destalked crabs at ecdysis. Implanted destalked crabs had a higher protein content than non-implanted.

3. Osmorlarity of hemolymph is lower in all animals at ecdysis than in intermolt. Distribution of fluids is abnormal in destalked crabs; it is partialy corrected implanting a TGM.

4. Hepatopancreatic water and lipid content are comparable in all crabs at ecdysis.

5. The significance of these results to the biology of the crab is discussed.

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Journal Title

Comparative Biochemistry and Physiology Part A: Physiology

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Copyright © 1975 Published by Elsevier Inc.