Fitness costs

Cost of intergroup Cost of competition and/or intragroup predation risk competition
Troop site (number of baboons per group)
Bamboons are omnivorous primates that forage in large groups for insects, small vertebrates, and plants. Each group defends an area against other groups entering to forage there. Human economic development has decreased the number of undeveloped areas that are large enough to be suitable for a baboon group to forage.

  1. The graph above shows the fitness costs associated with group foraging in baboons. Draw the expected change in the model with decreasing numbers of undeveloped areas. (2 points) How will each of the following change with human economic development? For each, mark the new and old values on the graph, label each, and explain.
  2. Cost of intergroup competition. Explain: