1. The concentrations of Na+ and K+ in the haemolymph remain relatively constant during the moulting cycle.

2. Desiccation, desiccation followed by rehydration and starvation exert little or no effect on the concentrations of Na+ and K+ in the haemolymph.

3. The volume of haemolymph decreases during desiccation and increases after rehydration.

4. More Na+ is voided in the excreta during desiccation.

5. Repeated desiccation and rehydration causes the loss of both Na+ and K+ from the body.

6. The effects of desiccation and rehydration on the concentrations of chlorides and free amino acids in the haemolymph are described.

This content is only available via PDF.