Abstract
Whole body water and concentrations of Na+ and Cl− in the whole tick, gut content, hemolymph, and artificially induced oral secretion (saliva) of pre-fed and engorging females of the Gulf Coast tick, Amblyomma maculatum (Koch) were measured. Concentrations of Na+ and Cl− were lowest in the gut and highest in the saliva; these results agree with those observed by others in other species of ixodid ticks. Estimates of overall Na+ and Cl− excretion and Na+ and Cl− excretion via the saliva indicate that the Gulf Coast tick may imbibe considerable non-whole blood tissue while feeding on sheep.
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