The lengthy muscle fibers mean chimps and other great apes can’t swim, Ross said. Indeed, the same muscles that are considered to be the source of a chimp’s strength can also be seen as a detriment for the animal. “There’s an aggression toward individuals that are not in their group.”īut chimps are often seen as friendly and cute animals because many facilities use preventive measures to prevent the aggression, he said. “They can adapt very well to their environment but that doesn’t preclude that they are territorial and they are violent and wild animals first,” Ross said. The emotional impulses also play a role in how aggressive they can become, he said. They directed the violence towards Andrew whom they feel was infringing on their territory.”Ĭhimpanzees have a wide range of emotions and they are similar to what humans experience, yet they are known to have erratic and unpredictable impulses, Ross said. “This is why we come to the conclusion, as far as our expertise goes, that it was a territorial defense. “They have no anger,” Cussons said of the chimps. The two chimps saw Oberle’s crossing the fence into the chimps’ space as a violation of their territory, prompting them to take action, Cussons said. In Thursday’s case, however, an internal investigation by the Jane Goodall Institute near Johannesburg showed that the chimps might not have intended to be malicious, Eugene Cussons, director of the institute, told ABC’s Good Morning America today. Such physical lack of control can potentially lead some chimps to become more aggressive when physical. As a result, sometimes chimps use more of their muscle strength than necessary, according to Walker’s theory, published 2009 in the journal Current Anthropology. The skeletal muscle fibers are much longer and denser, so they can generate more power in the same range of motion.Īlso, unlike humans, chimpanzees have less control over their muscles.
In chimps, the muscles closest to the bones - those deemed to be the source of strength of both chimps and humans - are much longer and more intense, so a chimp is able to generate more power using the same range of motion, Ross of the Lester Fisher Center said. Research suggests the difference in strength between the two lies in the muscle performance. Indeed, chimpanzees have been shown to be about four times as strong as humans comparable in size, according to evolutionary biologist Alan Walker, formerly of Pennsylvania State University.
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