Shark Population Dynamics at Ascension Island

The video explores a significant shark invasion on Ascension Island, highlighting the role of ecological changes and human activities. The island's isolation and unique ocean currents attract predatory fish, which in turn draw sharks, including the Galapagos species. Despite a historical balance between sharks and humans, recent shifts have led to increased shark presence near the shores. The video also examines the impact of big-game fishing, which lures sports fishermen and disrupts the local marine ecosystem, contributing to the convergence of sharks near the island.

What was the primary focus of the global shark attack expert George Burgess regarding Ascension Island?

• The local fishing industry

• The island's weather patterns

• The unique shark invasion events

• The island's tourism potential

Why is the situation on Ascension Island considered unique?

• It is known for its tropical climate

• It has a high number of tourist visits

• It is isolated with a small population and unexpected shark species involvement

• It is a large island with a dense population

What role do the South Atlantic currents play in the shark population around Ascension Island?

• They carry predatory fish that attract sharks

• They create strong waves that prevent fishing

• They deter sharks from approaching the island

• They warm the waters, making it unsuitable for sharks

What is the main attraction for sharks around Ascension Island?

• The island's coral reefs

• The abundance of large predatory fish

• The warm water temperatures

• The presence of other marine mammals

Which shark species is most commonly found in the waters around Ascension Island?

• Tiger Shark

• Galapagos Shark

• Hammerhead Shark

• Great White Shark

How have sharks and humans historically coexisted on Ascension Island?

• Through regular feeding by humans

• Through active hunting of sharks

• By avoiding each other's territories

• By maintaining a truce due to abundant food

Which of the following is NOT a species of shark mentioned as visiting Ascension Island?

• Bull Shark

• Mako Shark

• Great White Shark

• Hammerhead Shark

What is a significant reason for the recent convergence of sharks on Ascension's shores?

• A decrease in local fish population

• An increase in water temperature

• A natural migration pattern

• Human activities like big-game fishing

What is the economic impact of big-game fishing on Ascension Island?

• It is primarily a local activity

• It is a low-cost activity

• It has no significant impact

• It is a high-stakes activity with expensive trips

What is the estimated cost of a high-stakes fishing trip on Ascension Island?

• $100,000

• $50,000

• $25,000

• $10,000