Migración: depredación

The video describes the annual sardine migration from the Antarctic to South Africa, highlighting the journey of millions of sardines and the mass of predators that follow them. It details the path of the sardines through cold water corridors and the sophisticated hunting techniques used by predators like dolphins and gannets. The migration concludes as warm currents push the sardines back, and predators return home.

What triggers the annual migration of sardines from the Antarctic to South Africa?

• Seasonal temperature changes

• The presence of predators

• Changes in water salinity

• The movement of phytoplankton

Why do sardines congregate in a narrow corridor along the east coast of Africa?

• To avoid predators

• To breed

• To find warmer waters

• To stay within cold water limits

What is the role of dolphins in the sardine migration?

• They lead the migration

• They protect sardines from sharks

• They use sonar to hunt sardines

• They guide the sardines north

How do gannets participate in the sardine migration?

• By scaring away predators

• By diving to catch sardines

• By leading the sardines

• By herding sardines

What happens to the sardines when the warm currents return?

• They stop migrating

• They continue northward

• They disperse into smaller groups

• They are pushed back into the cold Antarctic current