One of the most important senses a whale has is its sense of hearing. (A number of exhibits within the Whales: Giants of the Deep exhibition feature these large whales.) The sei belongs to the Balaenopteridae, or rorqual whales, that have numerous ventral grooves and a dorsal fin. They hang down from the upper jaw forming the two uprights of a triangle with the lower jaw being the flat third side. The other rorquals are: blue, fin, Bryde's and minke. Photo courtesy of Christin Khan from NOAA. Sei whales occur in subtropical, temperate, and subpolar waters around the world. It is the only large whale that lacks a dorsal fin. The sei belongs to the Balaenopteridae, or rorqual whales, that have numerous ventral grooves and a dorsal fin. The baleen in their mouths filter the food for the other animals who feed on the algae and the clean the gook out of their mouths and the plaque off their teeth as well. Sei whales don’t gulp-feed like the other whales in their family. (A number of exhibits within the Whales: Giants of the Deep exhibition feature these large whales.) Sei Whales are protected under the Marine Mammal Protection Act of 1972 and the Endangered Species Act of 1973. World Wildlife Fund: Learn more about the Sei Whale, conservation efforts, and what you can do to help ensure the species' survival. They have a wide and tall dorsal fin. Sei Whales (pronounced either “sigh” or “say”) migrate to the Galapagos’ warmer waters during the winter. Whales are an amazing species that have evolved from land dwelling creatures millions of years ago (through ancestral blood lines) to the marine mammals we know today. Having acute hearing when submerged underwater is also extremely important because sound travels 4 times faster in water than it does and land, and those who have developed good underwater hearing have the best chances of survival, especially species that have to worry about potential predators. Mostly minos are the ones the most common type of animal that feed on the sei whales plaque, and herring feed on the gook. Sei whales inhabit all oceans and adjoining seas except in tropical and polar regions. In fact some whales can have blubber that measures up to 11 inches thick! One of the Baleen Whale species is the Sei Whale. Most sei whales appear to prefer living in moderate temperate cool to warm waters rather then in the freezing polar or hottest tropical regions of the world. Whales have a very acute sense of hearing and can detect sounds made by other whales from miles away, which can be important for mating or locating other whales in a pod. Not much is know about the resident whales, however, five different areas of the archipelago have been determined as gathering fields for Sperm whales. Lastly, smaller species of whale and other cetaceans are known to form pods or large communities which increase social interaction among marine mammals and helps deter large predators or at least minimizes the chance of any one animal being harmed since they all belong to a group. The sei whale migrates annually from cool, subpolar waters in summer to temperate, subtropical waters in winter with a lifespan of 70 years. Attention to dorsal -fin shape and position, head shape, and colour patterns will help to distinguish among the 3. Sei whales, in the skimming stance, must optimize the smaller mouth cross-section with the surface area of the exposed baleen at partial gape, which in turn, generates a Bernoulli effect, facilitated by external flow toward the negative pressure generated posterior to the expanded buccal pouch. This occurred in the South Atlantic, some 300 miles from the coast of present day Namibia. Sign in|Recent Site Activity|Report Abuse|Print Page|Powered By Google Sites. On August 6, 1848, at about 5 pm, the frigate H.M.S. Introduction to Mysticetes . Manta ray no affected and remora gets food and transport. The blue whale for example has a heart the can weigh the size of a small car (1,300 pounds) and its arteries are so large that a human could crawl through them. Status: Endangered Scientific Name: Balaenoptera borealis Length: 45-66 feet Weight: About 20 tons Reaching speeds up to 34.5 miles per hour makes the Sei Whale the fast whale in the water. Dolphins. Gestation lasts from 10 1/2 to 12 months. 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. Skimming the water for food while swimming, their short ventral pleats and bristle-packed baleen help them to collect as much delicious food as possible. Today’s whales share many anatomical traits with other mammals, but the unique adaptations of species such as Physeter macrocephalus, the sperm whale, illustrate how organisms can transform over time as they carve out their place on the planet. A big part of a whales ability to survive in the ocean has to do with its four chamber heart & large arteries which allow blood to quickly pass through the body and move to vital organs in an effective manner. Migration for the sei whale typically involves traveling to cooler waters during the warmer summer months in order to obtain food and build up their supply of blubber. Larger red blood cells allow whales to transfer oxygen more effectively than humans and other land mammals, and when submerged underwater their diving reflex allows them to distribute oxygen and blood to vital organs while restricting it in other non-essential areas. While not always the case large whales (particularly those that belong to the baleen whale suborder) tend to live more solitary lives and are more likely to travel alone or in small temporary pods. Muscles in the upper and lower regions of the caudal peduncle (tail stalk) provide power. Their throat grooves, in addition to str… from. While whales aren’t born with massively large lungs they are able to exchange as much as 90% of the oxygen they inhale as compared to humans who only exchange 10 %- 15%. It is dark blue-gray or brownish, with white patches on the belly. They have a pointed snout, paired blowholes, and a broad, flat rostrum (upper part of the head). Many adaptations allow the huge creature, and other deep-sea organisms, to function normally at great depths. No one thing is too small. Three professional drawings of the animal (The Illustrated London News 1848; reproduced in Figures 1 and 2 here), authorized b… Because whales are mammals they breathe oxygen and because they breathe oxygen they must come to the surface of the water to breathe. Unlike smaller species these whales have a much lower risk of being attacked by a predator and thus do not need to rely on large pods or groups for protection. Tucking into a variety of treats, fish, squid, krill, copepods and zooplankton are all part of their diets. ... black whale, or blackfish, porpoise, right whale, rorqual, sei whale, sperm whale or cachalot, toothed whale, … What is an adaptation of a Sei Whale? This is made possible by their baleen plates - fringed plates made of keratin that hang down from the whale's palate in the upper jaw and are supported by its gums. This is believed to be one of the fastest of all whales, and it can easily travel several miles per day while migrating. Seis are somewhat smaller than the fin whale which, in turn, is smaller than the blue whale. This goes at the bottom of every page. Dolphins and porpoises. The body is typ­i­cally a dark steel gray with ir­reg­u­lar white mark­ings ven­trally. They feature a pointed snout and very short pectoral fins. It avoids polar and tropical waters and semi-enclosed bodies of water. The sei whale (Balaenoptera borealis). These adaptations have played a huge role in their survival in the ocean and in particular against other oceanic animals that could do them harm. [11] [7] The specific name is the Latin word borealis, meaning northern. The Blue Whale is the largest animal in the world, which requires lots of food hence why they try to find large groups of krill. In addition to all of this whales are able to fill their lungs with oxygen in just 2 seconds. Balaenopteridae is from a Danish word meaning "tubed" or "pleated" whale. Daedalus encountered what its captain, P. M’Quhae, later described in a published official report (M’Quhae 1848a) as an enormous serpent, at least sixty feet long. Whale Adaptations Blubber. Not only did whales have to adapt to a purely aquatic lifestyle they also had to survive against predators that were already living in the ocean well before them. Often found with pollack in Norway, the name \"sei\" comes from the Norwegian word for pollack, \"seje.\" The sei whale (Balaenoptera borealis) is a medium sized rorqual with basic features similar to the larger fin and blue (Balaenoptera sp.). It is thickset and has small paddlelike flippers and a series of rounded humps on its back. In order to survive in the ocean whales have had to adapt their lungs so that they could breathe easily and hold their breath for extended amounts of time when submerged underwater. The Sei Whale has a body that is very slender. Mysticetes are carnivores, but rather than feeding with teeth, they use a straining system to eat great quantities of small fish, crustaceans or plankton in one gulp. In fact during migration periods the blue whale will go without food for up to four months while they migrate and live primarily off of the body fat and calories that are stored within its blubber. These large marine mammals are often passed by numerous would be predators because they are simply too large to be successfully attacked and therefore attempting to injure and kill a large whale would likely be a huge waste of time and energy. Identification. Minke Whale | Bryde’s Whale | Sei Whale | Humpback Whale | Fin Whale | Blue Whale | Sperm Whale | Short Finned Pilot Whale | Orca/Killer Whale. Population Habitat & … Survival Adaptations Sei whales have rare thick blubber and harder metal plates and baleen in their teeth with larger bodies and body mass than other whales. The sei whale is one of the fastest whales, reaching speeds of up to 30 miles per hour. Commerson’s dolphin; Dusky dolphin; Hourglass dolphin; Long-finned pilot whale; Orca; Peale’s dolphin; Southern right whale dolphin; Porpoises. The Structures & Adaptations to Marine Living; ... Sei whale mating occurs during the winter months with sei whales in the Northern Hemisphere mating between November-February and between May-July in the Southern Hemisphere. Whale Adaptations - Respiration However, the problem with this type of respiration is that large lungs full of air would hinder the whale’s ability to dive to any significant depths. Sei whales are most likely to be confused with Bryde's whales and, less likely, with fin whales. Sei whales have a rel­a­tively slen­der body with a com­pressed tail stock that abruptly joins the flukes. It is ranked #3 in terms of overall Baleen Whale size. Detection of prey … Flippers help to steer, while the back muscles, which are very large, … This is supplied by up to 3.6 tonnes or about 40 million individual krill eaten per day which all have to be processed by the digestive system. The 3 head ridges of Bryde's whales, and larger size and asymmetrical head coloration of fin whales will help make them distinguishable. The Sei Whale, Balaenoptera borealis, is a baleen whale, the third largest rorqual after the Blue Whale and the Fin Whale. While the sei whale has an expandable buccal pouch, it’s capacity is substantially reduced by the length of the ventral grooves relative to fin and blue whales. The sei is a baleen whale and they are usually divided into three families. During periods of rest whales can often be found logging around (resting motionless) at or near the surface of the water so that they can easily obtain oxygen whenever necessary. Blubber plays an extremely important role in a whales life. The other rorquals are: blue, fin, Bryde's and minke. and Media Sources:List the titles of Anatomical Adaptations Baleen plates in the mouth instead of teeth, made of keratin, the same tough protein that makes hair and nails. Over the course of their evolution whales have made many adaptations towards their oceanic lifestyle so that they could survive and thrive in the underwater world. This blubber not only keeps whales warm but also acts as a protective barrier against smaller predators such as sharks. It inhabits most oceans and adjoining seas, and prefers deep offshore waters. Length: 60 ft. (Adult) Mass: 44,000 lbs (Adult) Scientific name: Balaenoptera borealis. The sei whale is one of the fastest whales, reaching speeds of up to 30 miles per hour. When threatened some whales are able to reach speeds of 25 – 30 mph for short bursts in order to escape potential predators or threats. Echolocation is extremely useful in areas where visibility is low and helps whales avoid colliding with other objects when they are unable to see what is around them. Mammals are characterized by the following features: ... And sei whales don't migrate as far toward the poles as most species do. A pod of Sei whales is spotted as the R/V Thomas G. Thompson conducted magnetic surveys of the ocean floor about 150 miles from Wake Island. In both sei and Bryde's whales, the dorsal fin rises at a steep angle from the back. The baleen in their mouths filter the food for the other animals who feed on the algae and the clean the gook out of their mouths and the plaque off their teeth as well. Lungs. Hunting of these whales by humans has been high since the 1950s. How is the manta ray specifically designed to conserve energy? Information By using echolocation toothed whales can determine many factors about their environment such as how far an object is, how fast it is moving, whether it is above or below them, what direction it is traveling in, how large it is and whether it is a hollow or solid object. Right whales are the rarest of all large whales. How You Can Help: NOAA: Learn more about the Sei Whale's habitat, threats, and efforts being made for conservation. They prefer subtropical to subpolar waters and can be found in all oceans and adjoining seas, except for those in tropical and polar regions. Rorquals are more streamlined than other baleen whale families, and they swim fastest of baleen whales. As many people know some species of whale have very thick layers of blubber. Over the course of evolution whales (or rather their ancestors) have evolved and adapted their physiology from living and walking on land to living solely in the ocean. 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