Sperm whale lung volume

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The lower jaw usually has 20 to 25 pairs of large 10 inches [25 cm] long teeth. One source suggests the teeth are more for fighting amongst males or for defense than for eating. Young sperm whales often don't sprout teeth until some time after they have started feeding themselves.

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I become concerned when a diver is advised to avoid diving deeper that 30 feet. The reason is depicted in the graph below which shows that the greatest change in lung volume occurs near the surface, where the risk for lung overpressure injury and Arterial Gas Embolism is the greatest. As pressure falls on ascent, the lung volume expands.

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Cuvier's beaked whales dive deeper than any other animal, going down almost 3km. How do they survive in the crushing pressure? When it comes to diving deep, Cuvier's beaked whales lead the pack.

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No light reaches the murky depths, and no human could survive the crushing pressure from the water above. It is easier for a person to exist in space than it is to explore the ocean floor at such depths. Despite the extreme conditions, these whales manage to hunt two kilometres deep, surviving on a single breath for near to an hour, many times each day. Marine mammals as a group are accomplished divers.

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It is the only living member of the genus Physeter and one of three extant species in the sperm whale familyalong with the pygmy sperm whale and dwarf sperm whale of the genus Kogia. The sperm whale is a pelagic mammal with a worldwide range, and will migrate seasonally for feeding and breeding. The females cooperate to protect and nurse their young.

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Caring for Stranded Marine Animals. Because whales live in the ocean, many people think they are fish. But do you know that whales and dolphins are not fish?

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E-mail address: piscitellim uncw. Use the link below to share a full-text version of this article with your friends and colleagues. Learn more.

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Some sea creatures exploit great depths. The biggest physiological challenges in adapting to pressure are probably faced by those animals that must routinely travel from the surface to great depth. Two such animals are the sperm whale and the bottlenose whale.

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Whales are mammoth creatures and are mammals; both factors that may make the assumption that they have enormous lungs seem to be quite reasonable. However, this is not actually the case. In fact, the lungs of the whales are quite small in proportion to their bodies.

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Diving lung volume and tissue density, reflecting lipid store volume, are important physiological parameters that have only been estimated for a few breath-hold diving species. We fitted 12 northern bottlenose whales with data loggers that recorded depth, 3-axis acceleration and speed either with a fly-wheel or from change of depth corrected by pitch angle. The resulting estimate of diving gas volume was Dive-by-dive variation in gas volume did not correlate with dive depth or duration.


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