Foraging Knowledge-Based Practice

Questions

1. 1.

   In central place foraging, how is the optimal load size transported back to a nest or burrow predicted to change as the distance to a foraging patch increases?

   • A) It decreases to reduce body mass and minimize predatory detection during return flight.
   • B) It remains unchanged because load size is governed strictly by the anatomical volume of the mouthparts.
   • C) It drops to zero because foragers abandon central nesting when resource patches are located far away.
   • D) It increases to maximize the net rate of energy delivery relative to the greater round-trip travel time.
2. 2.

   According to risk-sensitive foraging models, under which condition is an animal predicted to become risk-prone by preferring a foraging patch with variable food rewards over a patch offering a constant reward of the same mean?

   • A) When the constant patch reliably provides more energy than the animal requires to survive
   • B) When the energetic costs of traveling between patches exceed the total caloric value of the food
   • C) When predation pressure in the surrounding habitat increases beyond baseline levels
   • D) When the expected intake from the constant patch falls below the animal's minimum metabolic requirement for survival
3. 3.

   According to the classic optimal diet model of foraging theory, what primary factor determines whether a predator should expand its diet to include a lower-profitability prey item?

   • A) The absolute abundance and handling time of the lower-profitability prey item
   • B) The encounter rate of the higher-profitability prey item, regardless of the lower-profitability prey's abundance
   • C) The total metabolic cost incurred while digesting previously consumed lower-profitability prey items
   • D) The degree of genetic relatedness between the predator and competing individuals in the same territory
4. 4.

   Under the marginal value theorem, how does an increase in travel time between resource patches affect an animal's optimal patch residence time?

   • A) Depart each patch more quickly to locate unexploited food sites.
   • B) Switch permanently to a sit-and-wait predatory strategy.
   • C) Spend a longer time foraging in each visited patch before departing.
   • D) Restrict its diet exclusively to food items that require zero handling time.
5. 5.

   According to optimal foraging theory, how does natural selection shape the feeding strategies of animals exploiting patchy resources?

   • A) It favors individuals that maximize their net rate of energy intake per unit of time while balancing associated costs and risks.
   • B) It selects for individuals that consume every available food item in a patch regardless of search and handling costs.
   • C) It encourages animals to minimize their total caloric intake to reduce the physical exertion of foraging.
   • D) It restricts foraging behavior strictly to predator-free areas even when net energy gain is consistently negative.

Answers and step-by-step solutions appear after you finish the test.