The largest suborder, mysticeti (baleen whales) are characterized by baleen, a sieve-like structure in the upper jaw made of keratin, which it uses to filter plankton from the water odontoceti (toothed whales) bear sharp teeth for hunting odontoceti also include dolphins and porpoises. Baleen is a keratinous structure attached to the upper jaw in some whales and is used to filter out water while feeding evolutionists see this unique arrangement as “highly derived” or apomorphic, meaning it’s an evolutionarily advanced character state. The evolution of whales essay - the evolution of whales image sitting on the beach one july morning the sun is beaming down and decide to go for a swim the first group is mysticeti (baleen whales), and the other isodontoceti (toothed whales) in the group odontoceti, there is a family of whales called delphinidae (dolphins and small.
Like a modern baleen whale, janjucetus had baleen in its jaw and had very little biosonar capabilities however, its jaw also contained teeth, with incisors and canines built for stabbing and molars and premolars built for tearing. The ancestors of modern baleen whales—including the ancient forbears of blue whales (balaenoptera musculus) and humpbacks (megaptera novaeangliae)—just got four new relatives. The fin, gray, humpback, blue, bowhead, bryde’s, right, minke, blue, and sei are baleen whales humpback whales are baleen whales baleen whales have two nostrils, or blowholes killer whales and dolphins are both members of the toothed whale group toothed whales have teeth instead of baleen.
Abstract the blue whale is the largest creature of the sea, in fact, it is the contrary to what most people think, even though blue whales live in the sea, they are mammals they breathe air, have their babies born alive and can live anywhere from 30 to 70 years the blue whale is a baleen. Whales strain seawater through the baleen, and hairs on the baleen capture fish, shrimp, and plankton the salt water then flows back out of the whale's mouth the largest baleen whales strain and eat as much as a ton of fish and plankton each day. The baleen species include the right, bowhead and grey whales, and the six rorquals (a norwegian word meaning ‘grooved’ whales, referring to the throat pleats in these species): the blue, fin, sei,) bryde’s, humpback and minke whales.
Most whales have baleen in their mouths, which is a stretchy substance with small, horn-like fixtures the baleen is positioned in a series of plates in the whale's upper jaw, filtering out zooplankton and krill toothed whales, on the other hand, eat fish and other sea creatures. This suborder includes the sperm whale, killer whale, pilot whale, and beluga whale the other cetacean suborder, mysticeti (baleen whales ), comprises filter feeders that eat small organisms caught by straining seawater through a comblike structure found in the mouth called baleen. The other cetacean suborder, mysticeti (baleen whales), comprises filter feeders that eat small organisms caught by straining seawater through a comblike structure found in the mouth called baleen save the whales essay save the whales whaling is the hunting of whales, primarily for their.
We will write a custom essay sample on evolution of whales specifically for you for only $1638 $139/page order now the blue whale is in the sub- order baleen whale and has long slender body shaded blue at some parts of the body they feed on krill and only hunt in areas with concentration of krill they mostly mate during autumn. Let me say at the beginning of this essay that i do not doubt that baleen whales were derived from toothed whale ancestors what i do doubt is the theory that this transformation from toothed whales to baleen whales was accomplished by a process of slow, step-by-step evolution over long periods of time through the action of natural selection on a series of viable and competitive prototypes. Whales are separated into two groups, the baleen and the toothed whales the blue whale is the largest baleen whale and the largest animal that ever lived on earth, including the largest dinosaurs baleen are rows of coarse, bristle-like fibers used to strain plankton from the water. The annual migrations of baleen whales are a conspicuous but unexplained feature of their behavioral repertoire some hypotheses offered to explain whale migration focus on direct benefits to the calf (thermoregulation, calm water) and some do not (resource tracking, and the “evolutionary holdover” hypothesis.
Whales, dolphins and porpoises all belong to the same taxonomic order called cetaceanscetacean distribution and abundance in the bering sea is poorly described, with even recent reviews of cetaceans' role in the ecosystem reliant on data from historical whaling records. Blue whales (balaenoptera musculus) are baleen whales (suborder mysticeti) they are one of 76 species and are marine mammals background the blue whale is called a “rorqual”, a norwegian word for “furrow” referring to the pleated grooves running from its chin to its naval. Essay the blue whale is the largest creature of the sea, in fact, it is the largest creature known to man contrary to what most people think, even though blue whales live in the sea, they are mammals they breathe air, have their babies born alive and can live anywhere from 30 to 70 years the blue whale is a baleen whale, and instead of having teeth, blue whales have around 300-400 baleen.