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Summary: The Decline Of Sea Otters

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The reading and the lecture talk about the decline of sea otters population which begins a few years ago. This animals live in North America's west coast. After analysis, especialists suggest two possibles reasons to the problem: environmental pollution and attacks by predators.

First, the text pollution as the most likely cause to population decrease. However, the professor disagree of this afirmation. He claims the death pattern of otters, founded in Alaka's beach, is different which expected by pollution and attacks by predators is a better explanation to decline in otters population.

Second, while the reading states orcas could not cause this effect, the lecture exposes orcas prefer to hunt wheals, but they dissapeared. Thus, orcas

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