The mating season for these marine mammals occurs during the winter months where they spend several months mating and giving birth to offspring. They have a pointed snout, short pectoral fins, and a dorsal fin that is erect and found at the end of the back. 6) Due to extensive whaling efforts during the whaling era these marine mammals are now considered an endangered and protected species. Sei Whales are found in the Atlantic, Pacific, and Indian Oceans. Sei whales are large marine mammals that can reach a length up to 60 feet (18.3 meters) and a weight of 100,000 pounds (45,359 kilograms). Female sei whales bare a single offspring once every 2 – 3 years and on rare occasions twins may be born. Hunting of these whales by humans has been high since the 1950s. Pursuant to section 120.74, Florida Statutes, the Fish and Wildlife Conservation Commission has published its 2019 Agency Regulatory Plan. The sei is a baleen whale and they are usually divided into three families. 2) Because the sei whale is a marine mammal it is warm-blooded, produces milk, gives birth and breathes air. The Sei whale also reproduces at an early age of six years old allowing more sei whales to be produced, the sei whale also lives a long life of about sixty years old so they live longer to control the population even more. 9) Because the sei whale is a baleen whale it is born with two blowholes and lacks teeth, which are instead replaced with up to 400 baleen plates packed with bristles that are used to filter their prey from the water. Oil spills, toxic chemicals and garbage can either affect the whales health directly or through the sources of food they eat. Water pollution can also be a major concern in certain areas. As of current not much is known about why these sounds are created. Maturity is typically reached at around 7 – 11 years which is when these whales can begin mating and reproducing, however they do not reach full maturity until . During feeding periods these whales may dive for up to 20 minutes while searching for food. An American naturalist named Roy Chapman Andrews named it the cheetah whale because of its speed bursts. Found worldwide, the sei whale once numbered in the hundreds of thousands. Like other great whales, they prefer to spend the summer feeding in cooler waters before migrating to … They are a smooth animal with blue gray skin or blubber. Distribution. International Union for Conservation of NatureNational Oceanic & Atmospheric AdministrationSmithsonian National Museum of Natural HistoryPrintable version of this page. Retrieved June 7, 2011 from NOAA National Marine Fisheries Servicehttp://www.nmfs.noaa.gov/pr/species/mammals/cetaceans/seiwhale.htm, Florida Fish and Wildlife Conservation Commission • Farris Bryant Building and A.W. Sei whales are largely solitary animals although they may be seen swimming in small pods of up to 6 at times and on rare occasions may increase to around 50 or more during certain feeding periods. Movement patterns are not well known, but many animals are thought to migrate between lower latitude wintering grounds and higher latitude feeding grounds in the summer. This Sei Whale was a juvenile male, 38 feet in length and still not at the adult size of 45 feet. 5) The sei whale can be found in all of the worlds major oceans, however they tend to avoid extremely cold/hot climates near the polar and tropical regions of the world. Since sei whales are marine mammals they produce milk and the mother whale feeds her newborn by producing milk from her mammary gland which the child suckles from her nipple. Little is known about the social structure of sei whales or their relationships to one another regarding whether or not they bond or develop long-term relationships. 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. Quick facts about this endangered baleen whale. Sei whales have a wide distribution and live in subtropical, temperate, and subpolar waters around the world. In regards to natural threats the only marine mammals known to hunt these large whales is a pod of killer whales. These whales are the third largest known whales in existence reaching lengths of up to 60 feet. They feed mainly on copepods and are thought to skim the surface for their prey. Killer Whales are also the deadliest Whales in the oceans. The scientific name of Balaenoptera borealis has the meaning “winged whale” and “northern.” After the Blue whale and Fin whale, the Sei … The sei whale typically travels alone or in groups of two to five, but occasionally forms loose gatherings of 30 to 50 animals on productive feeding grounds. 7 Scintillating Sei Whale Facts. Sei whales can be broken down into two sub species: the northern sei whale and the southern sei whale. 3) The scientific name for the sei whale is, “Balaenoptera borealis”. The Sei Whale migrates annually from cool and subpolar waters in summer to temperate and subtropical waters for winter. Adult male sei whales usually grow to be 40 – 50 feet long and weigh as much as 100,000 pounds, while female whales generally grow to be a bit larger than their male counterparts. 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. National Marine Fisheries Service, Office of Protected Resources, Silver Spring, MD.105 pp. It has very fine grey-black baleen that traps very small particles of food. The reported global catch of Sei whales in the 1978-79 season was only 150, showing the dramatic drop in whale populations. Their diet primarily consists of zooplankton (copepods and krill); however, small fish and squid can also be part of their diet (National Oceanic & Atmospheric Administration, n.d.). Sei whales reach sexual maturity at ten years old and reach full-body size at around 25 years old (National Oceanic & Atmospheric Administration, n.d.). While these marine mammals are a protected species they may face occasional threats from whalers or poachers. Habitat Sei Whales are found in waters worldwide. The average lifespan for sei whales is 50 – 70 years. Balaenopteridae is from a Danish word meaning "tubed" or "pleated" whale. As such, they appear to be absent from a band around the equator and do not range as far toward the poles and ice edge as other baleen whale species. How You Can Help: NOAA: Learn more about the Sei Whale's habitat, threats, and efforts being made for conservation. When slow moving Sei whales surface, their blowholes and dorsal fin are often visible above the water at the same time. Interesting Sei whale Facts: Sei whale can reach 64 feet in length and 28 tons of weight. Introduction to Sei Whale. Summary; Policy Actions; Pertinent Documents; Critical Habitat; In compliance with the Endangered Species Act (ESA), the National Marine Fisheries Service (NMFS) and U.S. The nicknames ‘pollack whale', ‘coalfish whale' and ‘sardine whale' come from the fact that the appearance of sei whales often signalled the presence of large numbers of these fish. It was listed as endangered under the Endangered Species Conservation Act, the predecessor to the Endangered Species Act (ESA), in 1970. The sei whale can be found around the outer continental shelf and slope in the Atlantic, Pacific, and Indian Ocean (National Oceanic & Atmospheric Administration, n.d.). Sei Whales are the 4 th largest rorqual (the largest group of baleen whales) after the Blue Whale, the Fin Whale, and the Humpback Whale. The common name sei, pronounced “say” or “sigh” is derived from the Norwegian word for pollack (seje) - the whale usually appears in … This is believed to be one of the fastest of all whales, and it can easily travel several miles per day while migrating. Photo courtesy of Christin Khan from NOAA. They are fast swimmers, possibly the fastest of all cetaceans (whales and dolphins) reaching 50 kmh (31 mph) over short distances. Galapagos Sei Whales. Under Japan's Northern Pacific research whaling program for 2017-2028, allowed by the International Whaling Commission, it … Gregr, E.J. These whales can reach speeds of 30 miles per hour although the Dall’s Porpoise and the Sei Whale may be even faster. Sei whales grow to be 60 feet long, weigh up to 100,000 pounds and live to be 70 years old, according to the National Oceanic and Atmospheric Administration. A sei whale’s diet and feeding behaviour are more similar to those of a right whale than to other rorquals such as blue and fin whales. (n.d.). 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. Sei whale has pointed rostrum (snout), short pectoral fins, tall, slightly hooked dorsal fin … 1) The sei whale is the 3rd largest living animal on this planet after the blue whale and fin whale. They are also known to feed on fish and squid if they are encountered. During the colder winter months these whales will travel towards the warmer tropical/sub tropical environments where they and mate and give birth to their offspring. Like many other whales it migrates to northern temperate waters in summer and returns to warm tropical breeding grounds in winter. The sei whale is a baleen whale and belongs to the group known as Cetacea which also all whales, dolphins and porpoises. (It is estimated that nearly 2/3 of their population was decimated due to whaling). Sei whales are classified as baleen whales – they filter water for food through baleen plates. He also said the whale becomes tired after a couple of hundred meters and needs to calm down, just like a cheetah. The sei whale can be found swimming in all of the worlds major oceans, however certain populations may be more abundant than others. Critical Habitat The sei whale population was decimated by commercial whaling in the 1800s and early 1900s. Despite their large size these whales maintain a diet consisting primarily of krill, copepods, fish and plankton. Their skin is often covered in scars that become apparent after healing from being attacked or injured. They are 40 to 60 feet long and weigh around 100,000 pounds! A Sei Whale lives to be about 70 years old. The total gestation period can last up to the 12 months, with the female giving birth to one calf every other year. During the summer, they are commonly found in the Gulf of Maine, and on Georges Bank and Stellwagen Bank off the U.S. coast in the western North Atlantic. Best, P.B. Due to their large size and relatively wide distribution these marine mammals may face a number of possible thetas. Females are slightly larger than males. 2011. Sei whales inhabit all oceans and adjoining seas except in tropical and polar regions. 10) The sei whale has been recorded holding its breath for up to 20 minutes, however their maximum underwater time is unknown. The “Sei” in “Sei Whale” comes from the Norwegian word for Pollock, a type of fish. Sei whales also face a threat from ship and boat hits when they come to the surface for air. Sei Whale. Diet Sei Whales feed on small fish, squid and krill. 620 S. Meridian St. • Tallahassee, FL • (850) 488-4676 Disclosure Policy | Privacy Policy | Copyright © 2020 WhaleFacts.org. These whales are known for creating very loud low-pitched sounds. 7) The only known potential natural predators of the sei whale is a pack of killer whale. Calves are weaned around seven months. Sei whales are filter feeders and attack their prey by opening its mouth and swimming towards its prey with its mouth open. In areas where commercial fishing is extremely competitive over fishing causing some populations to relocate or face difficulties maintaining their food supply. The sei whale (Balaenoptera borealis). Migration patterns and population divisions are also poorly understood. Sei whale has dark, bluish grey back and light-colored belly. Copyright 1999 - 2020 State of Florida. Sei whales are also Federally protected as a Depleted species by the Marine Mammal Protection Act. Breeding Sei Whales breed during the winter months and after a gestation of 10.5 - 12 months a single calf is born. However, recently there have been more pregnancies spotted, suggesting that due to the mass harvesting and the decline in numbers, more female Sei Whales are giving birth on an increased pace to restore the population. They eat small fish and even smaller ocean creatures like krill and plankton. The sei whale is protected as an Endangered species by the Federal Endangered Species Act and as a Federally-designated Endangered species by Florida’s Endangered and Threatened Species Rule. National Marine Fisheries Service. A whale this size weighs about 10 tons (20,000 pounds). Between the 19th and 20th century, over 300,000 sei whales were killed and harvested by humans (National Oceanic & Atmospheric Administration, n.d.). Sei w… They prefer temperate waters in the mid-latitudes, and can be found in the Atlantic, Indian, and Pacific Oceans. and C.H. One of the Baleen Whale species is the Sei Whale. During their reproductive cycle the average gestation period (the period from conception to birth) for sei whales lasts 11 – 13 months. Sei Whale Balaenoptera borealis. The movement patterns of sei whales are not well known, but they are typically observed in deeper waters far from the coastline. 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. These whales have a dark bluish-gray appearance with a lighter pale under-body. Previously before the whaling era these marine mammals were a much more abundant species throughout the world, however extensive hunting has caused significant decreases in certain sei whale populations. Sei whales can blow water straight up out of their blow hole to a height up to 13 feet (four meters) (NMFS 2011, National Oceanic & Atmospheric Administration, n.d.). The sei whale can be found swimming in all of the worlds major oceans, however certain populations may be more abundant than others. 8) Aside from natural predators sei whales also face threats from collisions with ships, accidental catches in fishing nets and hazards with other fishing gear. Sonic whale. Habitat The sei whale can be found around the outer continental shelf and slope in the Atlantic, Pacific, and Indian Ocean (National Oceanic & Atmospheric Administration, n.d.). … It is ranked #3 in terms of overall Baleen Whale size. In the 1980’s the International Whaling Commission made whaling illegal; however, illegal poaching still continues today. They occur throughout all major oceans worldwide, except the polar regions, although they are known for their sudden influxes to an area and subsequent disappearances. Habitat. The name "sei" comes from the Norwegian "seje", used to describe a type of fish which gathers Norway's coast around the same time as sei whales. National Oceanic and Atmospheric Association. Everyday, an Orcas needs to eat hundreds of pound of fish, marine mammals (including other whales), squid, sea birds, etc. Sei whales reach sexual maturity at ten years old and reach full-body size at around 25 years old (National Oceanic & Atmospheric Administration, n.d.). 24 p. 111-133. This species is primarily gray with oval shaped white scars due to bites from cigar sharks and lampreys (fish). Sei whales are widely distributed in open ocean waters in temperate and sub-polar regions, appearing to favour areas with temperatures between 8-18 degrees Celsius2. The sei belongs to the Balaenopteridae, or rorqual whales, that have numerous ventral grooves and a dorsal fin. In highly commercialized areas these whales may be threatened by potential collisions with large ships or boats. Sei whale facts! 4) These marine mammals make up one of around 80 known species of cetacea (cetaceans include all species of whale, dolphin and porpoise). The Sei Whale (Balaenoptera borealis) is the third largest rorqual after the Blue Whale and the Fin Whale.It can be found worldwide in all oceans and adjoining seas and prefers deep off-shore waters. The whaling from that time period could still affect the population today if more females were killed than males. HABITAT AND DISTRIBUTION. If the numbers do not recover, they could be listed as critical. Currently the Sei Whale is an endangered species on the threatened list. Japan has killed up to 100 sei whales annually since 2000. Sei whale, (Balaenoptera borealis), also called Rudolphi’s rorqual or pollack whale, species of baleen whale capable of short bursts of speed that make it the swiftest of the rorquals.Usually attaining a length of about 13–15 metres (43–49 feet), this cetacean is bluish gray or blackish above with paler underparts and a relatively large hook-shaped (falcate) dorsal fin. These whales have 300 – 400 baleen plates on each side of its mouth which measure about 19 inches long per plate. Once its prey is captured it then pushes the water out of its mouth while keeping its food trapped in the baleen plates. It prefers waters with a surface temperature of 46-77 ° F (8-25 ° C). Breeding seasons differ in the geographical regions as the Northern Hemisphere sei whale population breeds between November and February, while the Southern Hemisphere population breeds between the months of May and July. Other threats include incidental capture in fish nets that can cause whales to drown. Florida Youth Conservation Centers Network, Florida’s Endangered and Threatened Species Rule, International Union for Conservation of Nature, National Oceanic & Atmospheric Administration, Smithsonian National Museum of Natural History, http://www.nmfs.noaa.gov/pr/species/mammals/cetaceans/seiwhale.htm, See a full list of our Social Media accounts. They are big eaters and are able to consume as much as 2,000 pounds of food per day. Sei whales are often seen in groups of two to five. Despite its large body size and mass, the sei whale is a super-fast swimmer.It can easily swim up to 35-40 mph (55-65 km/h). The take of these animals peaked in the 1964-65 season, when 25,454 of these whales were taken. The organ samples will be able to give more information to scientists about this whale’s health as well as add to the knowledge of this species. They eat around 900 kgs (1,985 lbs) of food per day. Note: When a sei whale feels threatened or startled it is estimated that they can reach speeds of up to 35 mph for short periods of time in order to escape a life threatening situation, however some estimates claim speeds of up to 40 mph. The dorsal fin is tall and located near the rear end of the whale about 2/3 down its back. Sei whales will take whatever is in abundance locally, whether it be fish (up to 30 cm long), squid or plankton, as long as it is shoaling (schooling).Sei whales obtain food by skimming through the water and catching prey in its baleen plates.An average sei whale can eat about 900 kgs of zooplankton (copepods, amphipods, euphausiids (aka krill)) and small fish a day. The sei whale is found in all oceans. The Sei whale (Balaenoptera borealis) is a dark-gray, stream-lined baleen whale that is found worldwide except in polar waters. Trites, Predictions of critical habitat for five whale species in the waters of coastal British Columbia. Draft Recovery Plan for the Sei Whale (Balaenoptera borealis). Sei Whale (Balaenoptera borealis) Critical Habitat. Interesting Facts about Sei Whales. One of the least well understood baleen whales, they are often confused with Bryde’s whales at sea, which m… Once born the mother will nurse her child and look after it and may continue to feed the calf milk for up to 9 months. Lockyer, Reproduction, growth and migrations of sei whales Balaenoptera borealis off the west coast of South Africa in the 1960's South African Journal of Marine Science, 2002. The sei whale is one of the fastest whales, with a cruising speed of 16 mph and a maximum speed reaching up to 35 - 40 mph. Report fish kills, wildlife emergencies, sightings, etc. Sei Whales are protected under the Marine Mammal Protection Act of 1972 and the Endangered Species Act of 1973. The sei whale is one of the fastest whales, reaching speeds of up to 30 miles per hour. During the colder winter months these whales will travel towar… Sei whale images (Balaenoptera borealis) - stock photos, illustrations & facts on this large baleen whale endangered due to commercial whaling We have the rare underwater images of this endangered sei whale, created by the world’s renowned professional wildlife photographers. Historically, the sei whale population has been seriously depleted due to human capture and harvesting. These whales can reach speeds in excess of 30 miles per hour for short bursts/periods of time. Derived from the Norwegian word for Pollack, there are two subspecies of the little-known sei whale: the northern and the southern. It swims in small pods of 3-5 whales but larger groups may form at rich feeding grounds. The global distribution of sei whales is unpredictable and poorly understood.

sei whale habitat

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