Salmon Migration and Environmental Challenges

The video discusses the remarkable journey of salmon, highlighting their life cycle, migration patterns, and the challenges they face, including climate change. It emphasizes the low survival rate of salmon from eggs to adulthood and the significant impact of environmental changes on their population. The narrative underscores the importance of human responsibility in conserving the environment and protecting these unique creatures.

What is the approximate number of eggs a female salmon brings from the ocean?

• 2,000

• 4,000

• 1,000

• 6,000

How often do salmon return to their birthplace?

• Every year

• Every two years

• Every four years

• Every three years

What is the significance of the salmon's return to their birthplace?

• It marks the end of their life cycle

• It is a time for feeding

• It is a chance to meet their offspring

• It is a moment of transition

What is the term used for the year with half as many salmon returning?

• Quiet year

• Subdominant run

• Migration year

• Dominant run

What is the distance salmon travel during their migration?

• Several hundred kilometers

• Over 1,000 kilometers

• Over 10,000 kilometers

• Several thousand kilometers

In 2009, what was the total run size of salmon returning to the Fraser?

• 7 million

• 1.5 million

• 3 million

• 5 million

What was the unexpected event in 2009 regarding salmon returns?

• High returns

• Low returns

• No returns

• Average returns

What environmental factor is increasingly affecting Fraser River salmon?

• Habitat loss

• Pollution

• Overfishing

• High water temperatures

What is the lethal threshold for salmon in the Fraser River?

• Low oxygen levels

• High water temperatures

• Low water levels

• High salinity

What responsibility do we have towards the planet according to the video?

• To exploit its resources

• To care for it

• To leave it alone

• To ignore its changes