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Scientists study the population of spotted and spinner dolphins because they are often affected by tuna fishing methods.
True
Tuna and dolphins are rarely found together in large schools in the Eastern Tropical Pacific Ocean.
False
The tuna purse-seine fishing method has been adjusted to allow dolphins to escape before being harmed.
True
The dolphin populations are recovering faster than scientists initially predicted.
False
Long-term monitoring is unnecessary for understanding why dolphin populations are not recovering.
False
Stress from capture methods may contribute to the slow recovery of dolphin populations.
True
The diagram of the tuna purse seiner helps explain how tuna fishing impacts dolphins.
True
The "big eyes" are hand-held binoculars used by scientists to observe marine mammals.
False
Scientists collect data on the presence of calves in dolphin groups to understand their reproduction patterns.
True
Dolphins often interact with other species, such as fish and seabirds, around floating logs in the ocean.
True
The primary focus of the research trip is to study the interaction between dolphins and seabirds
False
A graph on page 224 shows how the number of dolphins killed in tuna fishing has decreased over time
True
Spotted dolphins and spinner dolphins are the only marine mammals affected by tuna purse-seine fishing.
False
International laws now protect marine mammals, including dolphins, from harmful fishing practices.
True
Fishermen sometimes use swimmers in nets to help dolphins escape.
True
Overfishing and pollution may be contributing to the slow recovery of dolphin populations.
True
