![]() Spindle cells (neurons without extensive branching) have been discovered in the brains of the humpback whale, fin whale, sperm whale, orca, bottlenose dolphins, Risso's dolphins, and beluga whales. Humans are born with 28% of the adult brain weight, chimpanzees with 54%, bottlenose dolphins with 42.5%, and elephants with 35%. The majority of mammals are born with a brain close to 90% of the adult brain weight.The La Plata dolphin has an EQ of approximately 1.67 the Ganges river dolphin of 1.55 the orca of 2.57 the bottlenose dolphin of 4.14 and the tucuxi dolphin of 4.56 In comparison to other animals, elephants have an EQ ranging from 1.13 to 2.36 : 151 chimpanzees of approximately 2.49 dogs of 1.17 cats of 1.00 and mice of 0.50. The encephalization quotient varies widely between species.However, this comparison is complicated by the large amount of insulating blubber Delphinoidea brains have (15-20% of mass). In some dolphins, it is less than half that of humans: 0.9% versus 2.1%. The brain to body mass ratio (not the encephalization quotient) in some members of the odontocete superfamily Delphinoidea (dolphins, porpoises, belugas, and narwhals) is greater than modern humans, and greater than all other mammals (there is debate whether that of the treeshrew might be second in place of humans).This is slightly greater than that of humans (1,300–1,400 grams) and about four times that of chimpanzees (400 grams). Bottlenose dolphins ( Tursiops truncatus) have an absolute brain mass of 1,500–1,700 grams.Orcas ( Orcinus orca) have the second largest known brain mass of any extant animal.Sperm whales ( Physeter macrocephalus) have the largest known brain mass of any extant animal, averaging 7.8 kg in mature males.Comparison of actual brain size with the size expected from allometry provides an encephalization quotient (EQ) that can be used as a more accurate indicator of an animal's intelligence.īrain of the sperm whale, considered the largest brain in the animal kingdom Allometric analysis indicates that in general, mammalian brain size scales at approximately the 2⁄ 3 or 3⁄ 4 exponent of body mass. Since most of the brain is used for maintaining bodily functions, greater ratios of brain to body mass may increase the amount of brain mass available for more complex cognitive tasks. However, many other factors also affect intelligence, and recent discoveries concerning bird intelligence have called into question the influence of brain size. It is considered one of the most intelligent cetaceansĬetacean intelligence is the overall intelligence and derived cognitive ability of aquatic mammals belonging in the infraorder Cetacea (cetaceans), including baleen whales, porpoises, and dolphins.īrain size was previously considered a major indicator of the intelligence of an animal. Banksy’s books “ Banging your head against a brick wall ” and “ Wall and Peace ” with the quote next to the series of images “A lot of people never use their initiative because no-one told them to” consolidate this interpretation.Intellectual capacity of cetaceans A female bottlenose dolphin performing with its trainer. ![]() Banksy gives the solution in the last picture – this can be undermined by intelligent use of the tools provided by the system. The series of images Simple Intelligence Testing in Dumb Animals is therefore to be understood as a system criticism. Individual behaviors are subjected to social and political constraints. He criticizes the kind of person who acts according to norms and rules without evaluating them and making their own decisions. Unlike conventional animal experiments, Banksy gives the monkey the chance to escape the laboratory by using intelligence and available resources.Īt Banksy, the monkey functions as a symbol for humans. The fifth picture serves as an alternative end to the test series. Here the monkey manages to break out of its prison by stacking the safes on top of each other and slipping through the ceiling. While the monkey in the first pictures is primarily a symbol for the primitive in general, in the fifth picture, paradoxically, the positive connotations appear cunning and cheeky. ![]()
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