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Brain of the sperm whale, considered the largest brain in the animal kingdom. Sperm whales (Physeter macrocephalus) have the largest known brain mass of any extant animal, averaging 7.8 kg in mature males. [4] Orcas (Orcinus orca) have the second largest known brain mass of any extant animal. (5.4-6.8 kg) [5] Bottlenose dolphins (Tursiops ...
The human brain contains 86 billion neurons, with 16 billion neurons in the cerebral cortex. [ 2 ] [ 1 ] Neuron counts constitute an important source of insight on the topic of neuroscience and intelligence : the question of how the evolution of a set of components and parameters (~10 11 neurons, ~10 14 synapses) of a complex system leads to ...
[27] [28] Pilot whales mainly feed on cephalopods, though in certain regions fish may be more prominent in their diet. [29] [30] Northwestern Atlantic whales are thought to dine predominately on short-finned squid. [31] Long-finned pilot whales can often be seen lobtailing and spyhopping. Occasionally they may also breach. This species is ...
Pilot whales' long, sickle-shaped flippers and tail stocks are flattened from side to side. [4] Male long-finned pilot whales develop more circular melons than females, [4] although this does not seem to be the case for short-finned pilot whales off the Pacific coast of Japan. [12] A pilot whale spyhopping
The name "pilot whale" originated with an early theory that pods were "piloted" by a leader. Other common names include the "pothead whale" (after the bulbous melon), and "blackfish" (a catch-all term used to designate numerous species of small, dark-colored toothed whales, including the pygmy sperm whale and false killer whale).
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A gyrification index (GI) is a measure of the magnitude of cortical convolutions on the surface of the mammalian brain. [6] [35] Reptile's and bird's brains do not show gyrification. Mammals with a high GI are generally larger than those with a low GI; for example the pilot whale and bottlenose dolphin show the highest GI values.
Brain of the sperm whale, considered the largest brain in the world. Sperm whales have the largest brain mass of any animal on Earth, averaging 8,000 cm 3 (490 in 3) and 7.8 kg (17 lb) in mature males. [24] The brain to body mass ratio in some odontocetes, such as belugas and narwhals, is second only to humans. [25]