Figure 5. Predicted versus observed optimal number of quadrats to search when: the objective is to maximize the expected probability of detection for Atriplex semibaccata (a) and Lomandra longifolia (b); the objective is to satisfy a required probability of detection for Atriplex semibaccata (c), and Lomandra longifolia (d).

Multiple values are indicated by the bolder points; three values at the point (1,1) for Atriplex (c), and two values at point (1,2) for Lomandra (d). Search budget B is 5,10 and 15 minutes; travel time between quadrats c is 0.25, 0.5 and 1 minute. The diagonal line represents perfect correspondence.