Combined with consistent physical interaction with humans, noisy crowds, blaring music, and concrete tanks that affect echolocation, captive dolphins are under an incredible amount of stress.
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MYTH 4: Animals in Zoos are happy. Animals in captivity across the globe have been documented displaying signs of anxiety and depression. In fact, psychological distress in zoo animals is so common that it has its own name: Zoochosis.
Due in part to unnatural enclosures, animals in zoos are under stress. Animals are often bored and, as a result, some become aggressive and can lash out at other animals or zookeepers. In a study done on 40 chimpanzees in six different zoos, all of the chimps exhibited behavior their counterparts in nature did not.
While it's not actually illegal to keep captive cetaceans in the UK, stringent welfare rules have acted as a de facto ban. And so, since 1993, there have been no whales or dolphins, collectively known as cetaceans, kept in the country.
Polar bears are the animals that do worst in captivity. Carnivores such as polar bears, tigers, cheetahs, and lions are especially poorly suited for life in a zoo, according to a new study. The more an animal roams in the wild, the researchers found, the worse it fares in captivity.