Migration: Predation

The video explains the annual sardine migration from Antarctic waters to the East Coast of South Africa, occurring from May to July. Sardines follow phytoplankton and are pursued by predators like dolphins, birds, sharks, and whales. The migration begins in June, with sardines trapped in cold water corridors. Predators use strategies like creating bait balls to hunt sardines. The migration attracts thousands of predators, and as warm currents return, sardines head back to the Antarctic, with predators following.

What triggers the sardine migration along the East Coast of South Africa?

• The movement of phytoplankton

• The increase in water temperature

• The change in water salinity

• The presence of predators

Why are sardines trapped between the warm water current and the land during their migration?

• They are attracted to the warm water

• They are avoiding the cold Antarctic waters

• They can only survive in waters below 20°C

• They are following the dolphins

What is the role of dolphins in the sardine migration?

• They guide the sardines north

• They lead the sardines back to the Antarctic

• They use sonar to detect and hunt sardines

• They protect the sardines from other predators

Which predator dives into the bait ball created by dolphins?

• Sharks

• Whales

• Gannets

• Seals

What happens to the sardines and predators at the end of the migration?

• Sardines settle in the warm waters

• Predators remain in the area

• Sardines and predators return to the Antarctic

• Sardines migrate to the west coast