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The anglerfish Lophius piscatorius is a deep-sea fish that has genetically-based variation in the size at which it reproduces. There is a tradeoff between size at reproduction and total lifetime egg production such that fish that mature at smaller sizes produce fewer eggs than those that delay reproduction until later in life. However, the longer an individual delays reproduction the greater its risk dying before it can reproduce. This species has historically not been targeted for fishing, but is coming under increased pressure as human activities expand.
(a) Which of these fitness functions BEST describes the relationship between size at maturity and fitness prior to fishing? (choose ONE)
(b) Now imagine that intense fishing pressure on this species begins. The gear used to catch the fish is size selective and targets larger individuals. Now which function best describes the relationship between size at maturity and fitness? (choose ONE)
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