Practice question

Search time S1 is the expected time needed to locate the more profitable prey type. It affects whether rejecting a lower-ranked prey 2 is worthwhile. When S1 is short, the predator can bypass prey 2 and soon obtain a better return from prey 1. When S1 becomes long because prey 1 is scarce, waiting is costly and prey 2 may enter the optimal diet. By contrast, prey 1 remains worth accepting on encounter because it already has the higher profitability E1/h1. Thus S1 changes the acceptance threshold for prey 2 rather than the decision to consume the preferred prey type itself. The alternatives can be separated by asking what changes for each participant and which process causes that change. That approach is more reliable than treating familiar examples as fixed labels, because many interactions shift with environmental context. From an evolutionary perspective, traits persist when their net effects improve inclusive or direct fitness under prevailing conditions. The ecological terminology therefore summarizes both an immediate mechanism and its likely consequences across generations.