Tiger Sharks and Nesting Turtles

Rain Island, part of the Great Barrier Reef, is a crucial nesting site for green turtles, attracting up to 12,000 annually. Tiger sharks in the area primarily scavenge on dead or weakened turtles during nesting season, as shown by satellite tagging data. This behavior is similar to terrestrial carnivores like polar bears and hyenas, who scavenge during food pulses. The research provides new insights into the behavior and ecology of apex marine predators, suggesting that scavenging offers energy and safety benefits over active hunting.

What makes Rain Island a significant biological hotspot?

• It is a popular tourist destination.

• It is home to the largest population of tiger sharks.

• It hosts the highest population of nesting green turtles globally.

• It is the largest coral reef in the world.

During the turtle nesting season, what challenge do the turtles face?

• They can become weakened and die from heat exhaustion.

• They are attacked by other turtle species.

• They face competition for nesting sites.

• They are hunted by local fishermen.

What is the primary focus of the research on tiger sharks during the nesting season?

• To determine if sharks are migrating to other areas.

• To find out if sharks are primarily scavenging or hunting live turtles.

• To study the breeding patterns of tiger sharks.

• To observe the interaction between sharks and other marine species.

What does satellite tagging data suggest about tiger sharks' behavior?

• They migrate away from Rain Island during nesting season.

• They mainly scavenge on dead turtles.

• They avoid areas with high turtle populations.

• They primarily hunt live turtles.

Why do healthy turtles not perceive tiger sharks as a threat?

• Sharks are only present during the day.

• Sharks are too slow to catch them.

• Sharks are more interested in scavenging dead turtles.

• Turtles have developed a natural defense against sharks.

What advantage do tiger sharks gain by scavenging on dead turtles?

• It increases their hunting skills.

• It saves them time and energy.

• It helps them avoid other predators.

• It allows them to hunt in groups.

What is the main reason tiger sharks patrol Rain Island during the nesting season?

• To scavenge on dead turtles.

• To find new nesting sites.

• To hunt other marine species.

• To protect their territory.

How are tiger sharks similar to terrestrial carnivores like polar bears and hyenas?

• They are solitary hunters.

• They migrate long distances.

• They scavenge during food pulses.

• They hunt in packs.

What new insights does the research provide about apex marine predators?

• They are more aggressive than previously thought.

• They are less adaptable to environmental changes.

• They prefer hunting over scavenging.

• They may scavenge opportunistically like some terrestrial carnivores.

What behavior do tiger sharks exhibit that is similar to hyenas?

• They scavenge opportunistically.

• They form large social groups.

• They hunt in packs.

• They migrate seasonally.