The trout is a fish that lays its eggs in cold fresh water but spends some of its life in the ocean. Trout eat smaller fish. The graph provided shows the population of trout in the state of Wisconsin between the years 1999 and 2014. Francisco has noticed the Trout population has decreased in Wisconsin. He wondered why this was. He asked two fishermen to explain which change to the ecosystem had the largest effect on the trout population. ● Fisherman M said, “The slow rise in lake temperatures in Wisconsin between 1999 and 2014.” ● Fisherman Z said, “A hard freeze of many of the lakes in Wisconsin in the winter of 2006.” Which fisherman should Francisco believe?
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The trout is a fish that lays its eggs in cold fresh water but spends some of its life in the ocean....
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