Dependent calves, young baby dophins, are also provided with sponges from their mothers, as research in the wild has seen infant dolphins wearing tiny sponges on their snouts while swimming close to their mothers. Looking at the way dolphin’s use tools, while many believe that primates, such as chimpanzees, are the only species who use tools for activities, dolphins studied in the wild have been seen using sea sponges to protect their snouts from getting scratches as they scavenge for food on the ocean floor. Strong connections between the sensorial and motive areas of a dolphin’s brain to the body indicate that it is very much sensitive to pain and stress. The next largest brain among the marine mammals is the bottlenosed dolphin at 1,500 grams, followed by human brains at approximately 1,200 grams. The second largest brain in the world is the killer whale (or orca) at 6,000 grams. Weighing some 9,000 grams, it is six to seven times larger than the human brain. The largest brain in the world belongs to the sperm whale. Today I’m going to talk to you about dolphin intelligence and in particular their use of tools, methods of communication, sonar and also their sensory capacity.īut first let’s look at how the dolphin brain compares to the brains of other species in terms of size. What can dolphins copy from other species? How big is the brain of the bottle-nosed dolphin?Ĥ. The lecture will concentrate on tools, communication, sonar and what other aspect of dolphin intelligence?Ģ. Write no more than three words and/or a number.ġ. When you finish your listening practice, listening again and read the transcript at the same time.
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