Lesson, 1828 - Sei whale Distinctive Characteristics Sei whales can be confused with fin and Bryde's whales, both of which also have a prominent falcate dorsal fin.All 3 have typical rorqual body shapes. They have between 318 - 410 baleen plates on each side of the upper jaw. These whales feed near the surface of the ocean, swimming on their sides through swarms of prey. The Sei whale obtains food by skimming through the water and catching prey in its baleen plates. A S e i whale feeding at the surface. One of the fastest swimmers among the whales, the sei whale is capable of bursting speeds up to 30 mph (48 kph). The fastest whales are the Orca (or Killer Whale) and the Pilot Whale. 4) estimated from the aligned sequences was comprised of two clades with sei whale mtDNA sequences supported by a bootstrap value at 90%. They will twist their body from side to side, skimming to help them with filtering the food supply into the baleens. Between the 19th and 20th century, over 300,000 sei whales were killed and harvested by humans (National Oceanic & Atmospheric Administration, n.d.). Sei whales belong to the Mammalian Order Cetacea, in the suborder Mysticeti. The final alignment of sei, Bryde’s and fin whale mtDNA control region sequences yielded a consensus sequence of 491 nucleotides (including alignment gaps). It is found in warm and temperate waters in all oceans but not normally in the coastal waters around Northern Ireland. The Sei Whale is a member Balaenopteridae and they are third biggest member, the first is Blue Whale, which is up to 180 tonnes, (200 tons) and the second member is Fin Whale which is over 70 tonnes (77 tons), the Sei Whale is between 12 and 15 meters (40~50ft) and weighs 22~33tons. It is a member of the rorqual family with the characteristic ventral pleats of skin under the eye and the relatively flat and broad jaw. The blue whale (Balaenoptera musculus) is listed as endangered, and fin (Balaenoptera physalus) and sei (Balaenoptera borealis) whales are listed as vulnerable under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act).This plan outlines the measures necessary to ensure recovery of the Australian … Binomial name: Balaenoptera borealis, René Primevère Lesson, 1828. The sei whale is slender bodied and can reach up to 16 m in length. Behavior. Vessel SEI WHALE is a fishing ship sailing under the flag of Cameroon.Her IMO number is 7703950 and MMSI number is 613003577. Sei whale definition is - a widely distributed dark gray baleen whale (Balaenoptera borealis) that has a ridge on the top of the head and may reach a length of nearly 60 feet (18 meters) —called also sei. In both sei and Bryde's whales, the dorsal fin rises at a steep angle from the back. This is usually done in order to catch prey. Fast swimmers in bursts - R.C. Balaenoptera borealis is a baleen whale and can be recognised as such by the plates of baleen (rather than teeth) suspended from the upper jaw and the two blowholes on the upper body. New research has found southern Australian long-finned pilot whales are able to mimic the calls of its natural predator and food rival - the killer whale, as a possible ploy to outsmart it. It has very fine grey-black baleen that traps very small particles of food. Behaviour Sei Whales are consistent about staying at the water’s surface and have a rather regular dive sequence. This website will detail the Southern Sei whale as a species and discuss why it became endangered. [7] It avoids polar and tropical waters and semienclosed bodies of water. It weighs at least 20 tons and eats 900 kilograms of food daily. BLUE, FIN AND SEI WHALE RECOVERY PLAN . Comparison of the filtering ability in sei whale with others revealed the sei whale to be poor in those ability being 1 /5 of the fin whale, and 1 /8 of the bolting silk cloth GG54 (0.33 mm mesh aperture, 46% in porosity). The sei whale, one of the fastest marine mammals in the world, is part of the same family as blue and fin whales. Sei whales are almost exclusively plankton feeders. The fastest of the great whales is the Sei, which reaches 23 miles (or 37 kilometres) per hour. Order : Cetacea (suborder) -Mysticeti Shape : The Sei Whale has a slender head. Sei whale (Balaenoptera borealis) Baleen whale. The sei whale (/ ˈ s eɪ /, [4] [5] Balaenoptera borealis) is a baleen whale, the third-largest rorqual after the blue whale and the fin whale. The females do not tend to travel in groups of two to five individuals, although larger aggregations occur.... Whales measure, on average, between 12 and 16 metres long, which is equivalent to to... 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