Unlike the megamouth shark and whale shark, the basking shark relies only on the water it pushes through its gills by swimming; the megamouth shark and whale shark can suck or pump water through their gills.[6]. [52], "Basking Sharks" redirects here. During the winter, Basking Sharks swim to deeper waters. [46], The eastern north Pacific Ocean population is a U.S. National Marine Fisheries Service species of concern, one of those species about which the U.S. Government's National Oceanic and Atmospheric Administration has some concerns regarding status and threats, but for which insufficient information is available to indicate a need to list the species under the U.S. They can form sex-segregated shoals, usually in small numbers (three or four), but reportedly up to 100 individuals. It is tolerant of boats and divers approaching it, and may even circle divers, making it an important draw for dive tourism in areas where it is common. Basking sharks are slow-moving filter-feeders. 2015. These sharks seasonally migrate to reproduce and in search of food. Commercially, it was put to many uses: the flesh for food and fishmeal, the hide for leather, and its large liver (which has a high squalene content) for oil. This classifies them as Chondrichthyes fish. [40] Since 2008, it has been illegal to fish for, or retain if accidentally caught, basking sharks in waters of the European Union. Longevity is likely about 50 years, while maximum reported length is 12.2 m. The species can be found alone or in groups and appears to be segregated based on sex. A single shark can yield 200-400 gallons of oil. [4][27] They shed and renew their gill rakers in an ongoing process, rather than over one short period. The largest basking is recorded up to 12.27 m yet and the weight is about 16 tons. [8] Management plans have been declared to promote effective conservations. California Horn sha... Crested Port Jackso... Deepwater Spiny Dog... Dusky shark. Blue shark. Gestation is thought to span over a year (perhaps two to three years), with a small, though unknown, number of young born fully developed at 1.5–2 m (4 ft 11 in–6 ft 7 in). Other distinctive characteristics include a strongly keeled caudal peduncle, highly textured skin covered in placoid scales and a mucus layer, a pointed snout—distinctly hooked in younger specimens—and a lunate caudal fin. The maturity comes at the age of 6 – 13 and at the length of 4.6 – 6 m. the breeding frequency is thought to be two to four years. [28], A 2009 study tagged 25 sharks off the coast of Cape Cod, Massachusetts, and indicated at least some migrate south in the winter.

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