Brain size area in women, corresponding to spatial versus language specializations. Small studies have attempted to link brain volume with functional measures such as P300 auditory evoked potentials but finding no association. Studies attempting to related sibling differences in IQ to differences in brain volume are hampered by relatively small sample sizes and the noisy nature of such difference scores, yielding weak evidence for cross-trait cross-sib correlations. The largest brain is that of the sperm whale, weighing about , and killer whales, weighing about . An elephant's brain weighs just over and a bottlenose dolphin's . Brain size tends to vary according
Subsistence hunting of the bowhead whale say that one cannot live without the other. According to the Iñupiat, the whale is the center of their diet, culture, and spirit. This makes them dependent on the complex system of sharing and celebrating the whale, and leads them to pray to any killed bowhead whale in thanks for the life it has given to them. For the Iñupiat, subsistence hunting and fishing are important and viable economic strategies, which provide food and raw materials for the whole group. When hunters bring whales back to the community, about 65–70 people drag the whale onto the ice, where they work