Salmon Migration and Dam Impact

The video discusses the Elwha Dam removal project, highlighting its legal and ecological implications. It explains how the dams were initially illegal due to legislation requiring fish passage and describes the impact on salmon migration. The narrative follows the salmon's arduous journey from the Pacific Ocean, overcoming multiple dams to reach their spawning grounds. The video concludes by emphasizing the detrimental effects of dams on the salmon life cycle, particularly their access to spawning streams.

What was the initial reaction to the proposal of removing the Elwha Dam?

• It was immediately approved.

• It was ignored by the authorities.

• It caused a lot of trouble and controversy.

• It was met with widespread support.

What was the expectation when the speaker moved to Washington in 1991?

• The dams would be preserved as historical sites.

• The dams would be expanded.

• The dams would be used for tourism.

• The Elwha Dam removal would happen soon.

What was the speaker's involvement in the Elwha Dam project?

• They opposed the project.

• They were unaware of the project.

• They were actively involved in the removal project.

• They were a passive observer.

Why were the Elwha dams considered illegal?

• They were not maintained properly.

• They were constructed on private land.

• They blocked the migration of salmon, violating existing legislation.

• They were built without government approval.

What is remarkable about the salmon's journey?

• They migrate only a short distance.

• They are transported by humans.

• They swim against powerful rivers and past multiple dams.

• They travel by air to their spawning grounds.

How do salmon return to their birthplace?

• By being guided by other fish.

• By following the stars.

• By using a map.

• By following the scent of their home stream.

What is the significance of the salmon's journey to the mountains?

• It is a journey that requires human assistance.

• It is a short and easy swim.

• It is a dangerous and life-threatening journey.

• It is a leisurely trip.

What do salmon achieve by returning to their birthplace?

• They find new food sources.

• They change their color.

• They create offspring.

• They avoid predators.

What is the primary challenge that dams pose to salmon?

• They increase water temperature.

• They block essential migratory routes.

• They provide too much food.

• They create too much noise.

What is the ultimate consequence of a dam for salmon?

• It increases their population.

• It ends their migratory story.

• It provides a new habitat.

• It helps them grow larger.