Sea Otters Population Summary

The reading and the lecture are both about decreasing sea otters population among north America's west coast. This event happened rapidly. The author of the reading believes that environmental pollution has the major role in this case. He argues that attacks by predators may be another cause, but he believes usually they hunt larger animals. The lecturer casts doubt on the claims made in the reading. He thinks predators are the most important cause of declining sea otters population. He believes orcas will hunt this small prey because of there is not exist large mammals like Whale in that area and they have to use these small animals as their food source.
The reading focused on the environmental pollution as the main cause of this important