Trout: Life Cycle Example Scenario Introduction: In 1970 the trout population of a local lake reserve was about 2000 species. Although the lake had excellent vegetation for feeding, the food supply obviously had limits. Thus the ecology management personnel feared that overgrazing might lead to mass starvation. Since the area was too remote for fishermen, the ecology service decided to bring in natural predators to control the trout population. It was hoped that natural predation would keep the trout population from becoming too large and also increase the trout quality (or health), as predators often eliminate the weaker members of the herd. In 1971, ten Largemouth Bass were flown into the island. The results of this program are shown in the following table. The Population Change is the number of trout bom minus the number of trout that died during that year. Fill out the last column for each year (the first has been calculated for you). Year Trout Trout Predation Starvation Trout Population OlTspring Population Change Bass 1971 10 2,000 800 400 100 +300 1972 10 2.300 920 480 240 1973 16 2.500 1,000 640 500 1974 22 2,360 880 180 1975 28 2,244 996 1,120 26