Baleen Whales

The heavyweightb unity whales, also describeed whalebone whales or great whales, recoil the Mysticeti, one of two suborders of the Cetacea (whales, dolphins, and porpoises). Baleen whales ar characterized by having whalebone p later(a)s for filtering food from water, rather than having odontiasis. This distinguishes them from the some other suborder of cetaceans, the scraggy whales or Odontoceti. life sentence Mysticeti species have teeth only during the embryotic phase. fogey Mysticeti had teeth before baleen evolved. The suborder contains cardinal families and 14 species. A list of species can be fix infra and at the Cetacea article. The scientific name derives from the classical countersignature mystidos, which means unknowable. Baleen whales are the largest animals on earth, all the same they feed on some of the meekest animals in the ocean. thither are 12 baleen whale species divided into 4 families: indemnify, pygmy flop, gray and rorqual whales. Right wh ales were called the overcompensate whales to envision by archean hunters because they are large, swim slowly, have keen-sighted baleen plates, contain lots of oil, and float when killed. Right whales do non have abaxial tailfins or pharynx grooves. The taxonomy of this family is rather confusing, scarcely currently there are three species of right whales: the Union right whale, Southern right whale, and bowhead whale. The pygmy right is in a separate family although it shares similar characteristics to right whales. ancient whales have their own taxonomic family, genus, and species. They are the close to coastal of the baleen whales and are often found indoors a few miles of shore. Each year gray whales emigrate among their summertime feeding curtilage in the Bering, Chukchi, and Beaufort Seas to their winter breeding grounds off Baja California, Mexico. This is one of the longest migrations by a mammalian species. Gray whales are gray in color and their shinn y is encrusted with barnacles and a unique s! pecies of small crustaceans known as whale lice. They have 2-3 short throat grooves and instead of a dorsal fin they have a low dorsal hump followed by 6-12 knuckles or bumps. Whalers used to call gray whales devil fish because of their pugnacious response to be hunted. Rorqual whales are relatively aerodynamic in fashion and have pointed heads and small pointed fins. They can be distinguished from other whales by m whatsoever (25-90) deep groves along their throats that flesh out when they feed. There are 8 species of rorqual whales: the hunchback whale, fin whale, Brydes whale, blue whale, northern minke, antarctic minke, Edens (small-type) whale. earlier baleen whales freshman appeared as far back as primal Oligocene, or perhaps the latest Eocene (39-29 million years past; E.g. Llanocetus). Early baleen whales possess teeth inherited from their ancestors, as strange to baleen, in modern species. The Oligocene species Aetiocetus cotylalveus is considered the evolut ionary link between toothed and baleen whales. It was discovered by renowned dodo gatherer Douglas Emlong in 1964 near Seal Rock arouse refreshment Site, Oregon in a sandstone formation.

In the early 1990s, the species Janjucetus hunderi was discovered in Victoria, Australia by a surfer and was expound in 2006 by E. M. G. Fitzgerald. Janjucetus was a baleen whale with crisp teeth that hunted fish and squid as healthful as larger prey, potentially including sharks and dolphin-like cetaceans. These fogys hint that early baleen whales were wolfish and eventually evolved into the gentler, edental whales known t oday. A late get word identified palatal foramina (! bony impressions of blood vessels that feed the baleen racks) in the roof of the mouth of a toothed mysticete, Aetiocetus weltoni. The scientists involved indicated that this discovery implies that this whale possessed both teeth and baleen, and serves as an intermediate adaptive fibre between primitive toothed mysticetes and more travel toothless mysticetes. The first baleen-bearing, toothless baleen whales (such as Eomysticetus, and Micromysticetus)appeared in the late Oligocene. Early baleen whales probably could not echolocate; no anatomic evidence preserved in the skulls and ear regions of any fossil baleen whales show any of the adaptations associated with echolocation as in toothed whales (Odontoceti). Bibliography:http://virtualology.com/aquatichall/baleenwhales.com/http://en.wikipedia.org/wiki/Baleen_whalehttp://www.seaworld.org/infobooks/baleen/home.html If you want to buzz off a overflowing essay, order it on our website: OrderCustomPaper.com

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