2025年1月13日 · Orcas possess relatively large brains compared to their body size, a feature shared with other toothed whales (Odontocetes). However, the structure and function of the brain are equally crucial in understanding cognitive abilities.

2022年11月19日 · A 2014 study published in Brain, Behavior and Evolution found that while both sperm whales and killer whales have among the biggest brains of toothed whales, their brains are very different in their makeup. The sperm whale’s cerebellum is only about 7 percent of its total brain mass, while the killer whale’s cerebellum is twice that size.

2015年3月18日 · An orca has a brain 5-7 times larger than a human brain. The majority of that brain mass is in the frontal lobes- the part of the brain associated with higher cognitive processes (relatively little is involved with motor processes).

2 天之前 · Orcas possess large, highly convoluted brains, second only to sperm whales in size within the animal kingdom. Their brain is about five times larger than a human’s brain. This large brain size, combined with its complex structure, strongly suggests a capacity for high-level cognitive function. Why Humans Are Considered More Intelligent

2020年7月24日 · Sperm whales (Physeter macrocephalus) and killer whales (Orcinus orca) have the largest known brain masses of any living animal. A mature male sperm whale can have a brain that weighs up to 9kg, and killer whale brains can reach 6kg. In contrast, the average human brain is only 1.4kg.

2024年8月25日 · Orcas are faster than sperm whales, and they have better endurance to boot. An orca can move up to 30 mph in the water, maintaining a substantial portion of that speed for a while. Sperm whales move at about 4 mph on average, but they can burst forth at about 23 mph. Orcas have a speed advantage over sperm whales.

2007年5月15日 · The brain of a sperm whale is about 60% larger in absolute mass than that of an elephant. Furthermore, the brains of toothed whales and dolphins are significantly larger than those of any nonhuman primates and are second only to human brains when measured with respect to body size . How and why did such large brains evolve in these modern ...

2019年12月16日 · Smaller brains, smaller cerebellums and fewer cortical neurons potentially allow the beaked whale and pygmy sperm whale to dive longer and deeper than the dolphins. Although more gray matter, more neurons, and a larger cerebellum may limit dolphins to shorter, shallower dives, these features must give them some advantage.

2019年12月16日 · To begin a study of non-dolphin toothed whales, we measured a 596g brain of a pygmy sperm whale and a 2004g brain of a Cuvier's beaked whale. We compared neuron density of Nissl stained cortex of these two brains with those of the dolphins.

2024年6月27日 · Orcas have larger brains relative to their body size, which may indicate higher intelligence. 4. The cerebellum of a sperm whale is smaller compared to its overall brain mass, while orcas have a relatively larger cerebellum. This suggests that orcas may possess higher cognitive abilities than sperm whales. 5.