Well as to a number of life history patterns in mammals. The EQ value for a species relates to a number of general measures of cognitive processing ability in different mammals, as Nonetheless, it is worth noting that EQ levels in several species of odontocetes (toothed whales, dolphins, and porpoises) are significantly higher than is the case for any primate except our own species. Humans, by the way, have extremely high EQ values, estimated to be in the neighborhood 7.5, making our species the brainiest in existence. Thus, dolphin brains are not simply absolutely large: they are relatively very large as well. An EQ of 1.0 means that the brain is exactly the size one would expect for an animal of a particular size, an EQ higher than 1.0 means that a species is relatively brainy.īottlenose dolphins have a very high EQ, about 2.8 or higher.
The relative size of different body parts over a wide range of species. A measure of relative brain size that has been applied to a variety of species is the encephalization quotient (EQ), the ratio of brain mass to body size. However, it is still necessary for there to be some minimum amount of circuitry (brain cells and processes) present for a species to have the potential to be highly intelligent, whatever way the term intelligence is defined. Brain size is necessarily associated with overall body size, with large animals having large brains and small animals having small brains. Large brain size does not always mean that an animal is highly intelligent.
Passage 19 - The Brain Size of Bottlenose Dolphins
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