ecol - Biol 215 Ecology Biol 215 Ecology 1. A Central...

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Biol 215 Ecology
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Biol 215 Ecology 1. A Central Valley farmer stocked his farm pond with 1000 fathead minnows to raise as bait. Fatheads usually reproduce first as yearlings and regularly thereafter. The farmer recorded the number of fish each year for 10 years. He obtained the following data: Year Number of fish 0 1000 1 750 2 580 3 600 4 750 5 1200 6 1400 7 1460 8 1440 9 1450 10 1460 a. Plot these data on a graph. b. Mark the area on the growth curve where the rate is greatest. c. Mark the point at which the farmer should begin fishing if he wants to maintain his population. d. Why did the population decline during the first two years? e. What was involved in slowing the population growth from the sixth year on? f. Is the fathead minnow a K-strategist or an r-strategist? 2 Suppose that a fox feeds only on rabbits, squirrels, mice, and seed-eating birds, all of which feed on plant material. How many square meters of plant material are then required to support the fox if the net primary productivity of
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ecol - Biol 215 Ecology Biol 215 Ecology 1. A Central...

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