VOICED: Tracking dolphins in the Gulf of Genoa: a researcher's joy

Fulvio and his team study dolphins in northwest Italy, focusing on the impact of human activities, particularly chemical and sound pollution. They maintain a database of 244 dolphins, identified by unique dorsal fin features. The research reveals that dolphins sleep with one eye open, resting half their brains at a time, offering insights into their complex behavior.

What are the main types of pollution that Fulvio and his team are concerned about in their study of dolphins?

• Chemical and sound pollution

• Light and air pollution

• Water and soil pollution

• Thermal and radioactive pollution

How do researchers identify individual dolphins in their study?

• By their vocalizations

• By their dorsal fins and unique markings

• By their size and weight

• By their swimming speed

What unique feature helps researchers distinguish between different dolphins?

• Their tail length

• Their dorsal fin shape

• Their eye color

• Their skin texture

What is a unique characteristic of dolphin sleep discovered by the researchers?

• They do not sleep at all

• They sleep while swimming

• They rest one half of their brain at a time

• They sleep with both eyes closed

Why is the discovery of dolphins sleeping with one eye open significant?

• It shows they are always alert to predators

• It suggests they are migratory creatures

• It provides insight into their complex behavior

• It indicates they are nocturnal animals