[72], The sperm whale has the longest intestinal system in the world,[73] exceeding 300 m in larger specimens. [37] An individual measuring 20.7 metres (68 ft) was reported from a Soviet whaling fleet near the Kuril Islands in 1950 and is cited by some authors as the largest accurately measured. [224] Although the story may not be true, sperm whales were indeed soon exploited by American whalers. Socializing usually takes place in the afternoon. Like other toothed whales, the sperm whale can retract and protrude its eyes, thanks to a 2-cm-thick retractor muscle attached around the eye at the equator,[114] but are unable to roll the eyes in their sockets.[115]. The name sperm whale is a truncation of spermaceti whale. Learn more. Other than sperm whales, southern right whales had been observed to perform similar formations. [36][37][38] By contrast, the second largest toothed whale (Baird's beaked whale) measures 12.8 metres (42 ft) and weighs up to 14 tonnes (15 short tons). All those authors so far mentioned, who believed that the substance was not whale [9][10][11] They are a prime example of a species that has been K-selected, meaning their reproductive strategy is associated with stable environmental conditions and comprises a low birth rate, significant parental aid to offspring, slow maturation, and high longevity. Bulls will fight with each other over females, and males will mate with multiple females, making them polygynous, but they do not dominate the group as in a harem. And modern biologists assume that it probably functions to help with buoyancy or aid in echolocation 3. Use * for blank tiles (max 2) Advanced Search Advanced Search: Use * for blank spaces Advanced Search: Advanced Word Finder: See Also in English. [151], Grown males are known to enter surprisingly shallow bays to rest (whales will be in state of rest during these occasions). [214] Placoziphius, found in Europe, and Acrophyseter, from Peru, are dated to the late Miocene. Sperm whales gather off Sri Lanka in great number - at least 100, perhaps many more. [124] The lower jaw is the primary reception path for the echoes. An incident was filmed from a long-line trawler: a killer whale pod was systematically taking fish caught on the trawler's long lines (as the lines were being pulled into the ship) when a male sperm whale appeared to repeatedly charge the killer whale pod in an attempt to drive them away; it was speculated by the film crew that the sperm whale was attempting to access the same fish. Sperm whales are listed on Appendix I[240] and Appendix II[240] of the Convention on the Conservation of Migratory Species of Wild Animals (CMS). A continuous fat-filled canal transmits received sounds to the inner ear. [216], The traditional view has been that Mysticeti (baleen whales) and Odontoceti (toothed whales) arose from more primitive whales early in the Oligocene period, and that the super-family Physeteroidea, which contains the sperm whale, dwarf sperm whale, and pygmy sperm whale, diverged from other toothed whales soon after that, over 23 million years ago. [105], Below the spermaceti organ lies the "junk" which consists of compartments of spermaceti separated by cartilage. The name sperm whale is a truncation of spermaceti whale. [26] These anatomical differences suggest that fossil species may not have necessarily been deep-sea squid eaters such as the modern sperm whale, but that some genera mainly ate fish. Rudimentary teeth are also present in the upper jaw, but these rarely emerge into the mouth. [163] In one case, three sperm whales were observed attacking or playing with a megamouth. In Current Biology recorded evidence that suggests that female sperm whales will use their head. 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