Chapter 11: Problem 41
Federal or state agencies control hunting and fishing by setting a quota on how many animals can be harvested each season. Determining the appropriate quota means achieving a balance between environmental concerns and the interests of hunters and fishers. For example, when a June 8,2007 decision by the Delaware Superior Court invalidated a two-year moratorium on catching horseshoe crabs, the Delaware Department of Natural 91Ó°ÊÓ and Environmental Control imposed instead an annual quota of 100,000 on male horseshoe crabs. Environmentalists argued this would exacerbate a decrease in the protected Red Knot bird population that depends on the crab for food. For a population \(P\) that satisfies the logistic model with harvesting, $$\frac{d P}{d t}=k P\left(1-\frac{P}{L}\right)-H$$ show that the quota, \(H,\) must satisfy \(H \leq k L / 4,\) or else the population \(P\) may die out. (In fact, \(H\) should be kept much less than \(k L / 4 \text { to be safe. })\)
Short Answer
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.