Figure 5.
Recovery of caterpillars upon toxin injection. Caterpillars of E. core (grey) and D. plexippus (red) were either injected with water (control) or the standard cardenolide ouabain (10−2 M in water). Caterpillars which had resumed feeding by the next day were scored as recovered. Inset: typical appearance of an E. core caterpillar which is paralysed after injection with ouabain (response observed in 11 of 13 injected caterpillars). Sample size ranged from seven to 13 caterpillars. (Online version in colour.)