These Death-Defying Salmon Just Keep Spawning

The video explores reproductive strategies in animals, focusing on iteroparity and semelparity. It highlights the life cycles of Pacific and Atlantic salmon, emphasizing the perilous journey of Pacific salmon, which often ends in death after spawning. In contrast, some Atlantic salmon, known as kelts, survive to spawn multiple times. The video discusses the genetic and environmental factors influencing these differences and the importance of understanding these processes for conservation efforts.

What is the term used for animals that reproduce only once and then die?

• Iteroparity

• Semelparity

• Monoparity

• Biparity

Which type of salmon is known for dying after their first spawning?

• Atlantic salmon

• Pacific salmon

• Sockeye salmon

• Chinook salmon

What are Atlantic salmon called after they survive their first spawning?

• Parr

• Smolts

• Fry

• Kelts

In Norway, what percentage of female salmon are multi-year spawners?

• 40%

• 10%

• 20%

• 30%

What genetic factor might contribute to the survival of kelts?

• A gene variant for faster swimming

• A gene variant for larger size

• A gene variant for earlier maturity

• A gene variant for later maturity