sei whale habitat

Sei w… 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. 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.). Habitat Sei Whales are found in waters worldwide. 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. Under Japan's Northern Pacific research whaling program for 2017-2028, allowed by the International Whaling Commission, it … These whales are the third largest known whales in existence reaching lengths of up to 60 feet. 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.). During the colder winter months these whales will travel towar… 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. HABITAT AND DISTRIBUTION. Killer Whales are also the deadliest Whales in the oceans. 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.). 620 S. Meridian St. • Tallahassee, FL • (850) 488-4676 Habitat. They are fast swimmers, possibly the fastest of all cetaceans (whales and dolphins) reaching 50 kmh (31 mph) over short distances. National Marine Fisheries Service. Sei whales have a wide distribution and live in subtropical, temperate, and subpolar waters around the world. 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. 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. How You Can Help: NOAA: Learn more about the Sei Whale's habitat, threats, and efforts being made for conservation. Sei Whale Balaenoptera borealis. During their reproductive cycle the average gestation period (the period from conception to birth) for sei whales lasts 11 – 13 months. 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. 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. 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 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). This species is primarily gray with oval shaped white scars due to bites from cigar sharks and lampreys (fish). National Oceanic and Atmospheric Association. Trites, Predictions of critical habitat for five whale species in the waters of coastal British Columbia. Quick facts about this endangered baleen whale. Found worldwide, the sei whale once numbered in the hundreds of thousands. Photo courtesy of Christin Khan from NOAA. 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. Sei whales are also Federally protected as a Depleted species by the Marine Mammal Protection Act. 3) The scientific name for the sei whale is, “Balaenoptera borealis”. 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.). They have a pointed snout, short pectoral fins, and a dorsal fin that is erect and found at the end of the back. Currently the Sei Whale is an endangered species on the threatened list. During feeding periods these whales may dive for up to 20 minutes while searching for food. 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. Diet Sei Whales feed on small fish, squid and krill. 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. It is ranked #3 in terms of overall Baleen Whale size. National Marine Fisheries Service, Office of Protected Resources, Silver Spring, MD.105 pp. The sei is a baleen whale and they are usually divided into three families. 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. Copyright 1999 - 2020 State of Florida. They prefer temperate waters in the mid-latitudes, and can be found in the Atlantic, Indian, and Pacific Oceans. The total gestation period can last up to the 12 months, with the female giving birth to one calf every other year. The sei whale is one of the fastest whales, reaching speeds of up to 30 miles per hour. 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. The global distribution of sei whales is unpredictable and poorly understood. 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 sei whale (Balaenoptera borealis). (n.d.). It was listed as endangered under the Endangered Species Conservation Act, the predecessor to the Endangered Species Act (ESA), in 1970. These whales have a dark bluish-gray appearance with a lighter pale under-body. 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 . He also said the whale becomes tired after a couple of hundred meters and needs to calm down, just like a cheetah. Other threats include incidental capture in fish nets that can cause whales to drown. Sei whales are classified as baleen whales – they filter water for food through baleen plates. 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. Water pollution can also be a major concern in certain areas. 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. Due to their large size and relatively wide distribution these marine mammals may face a number of possible thetas. In regards to natural threats the only marine mammals known to hunt these large whales is a pod of killer whales. Females are slightly larger than males. Gregr, E.J. 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. They eat small fish and even smaller ocean creatures like krill and plankton. 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. They feed mainly on copepods and are thought to skim the surface for their prey. The scientific name of Balaenoptera borealis has the meaning “winged whale” and “northern.” After the Blue whale and Fin whale, the Sei … 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. The sei whale can be found swimming in all of the worlds major oceans, however certain populations may be more abundant than others. As of current not much is known about why these sounds are created. Distribution. 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. Between the 19th and 20th century, over 300,000 sei whales were killed and harvested by humans (National Oceanic & Atmospheric Administration, n.d.). 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. The mating season for these marine mammals occurs during the winter months where they spend several months mating and giving birth to offspring. Draft Recovery Plan for the Sei Whale (Balaenoptera borealis). 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. 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. They are a smooth animal with blue gray skin or blubber. The movement patterns of sei whales are not well known, but they are typically observed in deeper waters far from the coastline. 2011. Migration patterns and population divisions are also poorly understood. They are big eaters and are able to consume as much as 2,000 pounds of food per day. 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. While these marine mammals are a protected species they may face occasional threats from whalers or poachers. This is believed to be one of the fastest of all whales, and it can easily travel several miles per day while migrating. Balaenopteridae is from a Danish word meaning "tubed" or "pleated" whale. The whaling from that time period could still affect the population today if more females were killed than males. This Sei Whale was a juvenile male, 38 feet in length and still not at the adult size of 45 feet. Disclosure Policy | Privacy Policy | Copyright © 2020 WhaleFacts.org. Galapagos Sei Whales. Calves are weaned around seven months. Sei whales are often seen in groups of two to five. They eat around 900 kgs (1,985 lbs) of food per day. In highly commercialized areas these whales may be threatened by potential collisions with large ships or boats. A whale this size weighs about 10 tons (20,000 pounds). These whales can reach speeds of 30 miles per hour although the Dall’s Porpoise and the Sei Whale may be even faster. The average lifespan for sei whales is 50 – 70 years. 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. 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. 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. 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.). 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. Japan has killed up to 100 sei whales annually since 2000. The dorsal fin is tall and located near the rear end of the whale about 2/3 down its back. Interesting Sei whale Facts: Sei whale can reach 64 feet in length and 28 tons of weight. It has very fine grey-black baleen that traps very small particles of food. These whales have 300 – 400 baleen plates on each side of its mouth which measure about 19 inches long per plate. 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. Everyday, an Orcas needs to eat hundreds of pound of fish, marine mammals (including other whales), squid, sea birds, etc. The Sei whale (Balaenoptera borealis) is a dark-gray, stream-lined baleen whale that is found worldwide except in polar waters. Breeding Sei Whales breed during the winter months and after a gestation of 10.5 - 12 months a single calf is born. Historically, the sei whale population has been seriously depleted due to human capture and harvesting. If the numbers do not recover, they could be listed as critical. Once its prey is captured it then pushes the water out of its mouth while keeping its food trapped in the baleen plates. Hunting of these whales by humans has been high since the 1950s. Female sei whales bare a single offspring once every 2 – 3 years and on rare occasions twins may be born. These whales are known for creating very loud low-pitched sounds. A Sei Whale lives to be about 70 years old. Like many other whales it migrates to northern temperate waters in summer and returns to warm tropical breeding grounds in winter. 6) Due to extensive whaling efforts during the whaling era these marine mammals are now considered an endangered and protected species. 10) The sei whale has been recorded holding its breath for up to 20 minutes, however their maximum underwater time is unknown. Critical Habitat The sei whale population was decimated by commercial whaling in the 1800s and early 1900s. 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. 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. Sei whale has pointed rostrum (snout), short pectoral fins, tall, slightly hooked dorsal fin … Their skin is often covered in scars that become apparent after healing from being attacked or injured. Derived from the Norwegian word for Pollack, there are two subspecies of the little-known sei whale: the northern and the southern. In the 1980’s the International Whaling Commission made whaling illegal; however, illegal poaching still continues today. 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. Sei whales inhabit all oceans and adjoining seas except in tropical and polar regions. Sei whales also face a threat from ship and boat hits when they come to the surface for air. Report fish kills, wildlife emergencies, sightings, etc. Despite their large size these whales maintain a diet consisting primarily of krill, copepods, fish and plankton. Sei whales are filter feeders and attack their prey by opening its mouth and swimming towards its prey with its mouth open. 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. 24 p. 111-133. 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. It swims in small pods of 3-5 whales but larger groups may form at rich feeding grounds. Sei whale facts! 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. Oil spills, toxic chemicals and garbage can either affect the whales health directly or through the sources of food they eat. The Sei Whale migrates annually from cool and subpolar waters in summer to temperate and subtropical waters for winter. An American naturalist named Roy Chapman Andrews named it the cheetah whale because of its speed bursts. Sei whales can be broken down into two sub species: the northern sei whale and the southern sei whale. Sei Whale (Balaenoptera borealis) Critical Habitat. Pursuant to section 120.74, Florida Statutes, the Fish and Wildlife Conservation Commission has published its 2019 Agency Regulatory Plan. 4) These marine mammals make up one of around 80 known species of cetacea (cetaceans include all species of whale, dolphin and porpoise). These whales can reach speeds in excess of 30 miles per hour for short bursts/periods of time. Sei Whales are found in the Atlantic, Pacific, and Indian Oceans. 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. 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. 7) The only known potential natural predators of the sei whale is a pack of killer whale. Sonic whale. 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.). The common name sei, pronounced “say” or “sigh” is derived from the Norwegian word for pollack (seje) - the whale usually appears in … (It is estimated that nearly 2/3 of their population was decimated due to whaling). Interesting Facts about Sei Whales. Sei Whales are protected under the Marine Mammal Protection Act of 1972 and the Endangered Species Act of 1973. In areas where commercial fishing is extremely competitive over fishing causing some populations to relocate or face difficulties maintaining their food supply. They are 40 to 60 feet long and weigh around 100,000 pounds! 7 Scintillating Sei Whale Facts. The “Sei” in “Sei Whale” comes from the Norwegian word for Pollock, a type of fish. 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. One of the least well understood baleen whales, they are often confused with Bryde’s whales at sea, which m… and C.H. 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). It prefers waters with a surface temperature of 46-77 ° F (8-25 ° C). Sei whale has dark, bluish grey back and light-colored belly. Like other great whales, they prefer to spend the summer feeding in cooler waters before migrating to … 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. The sei whale can be found swimming in all of the worlds major oceans, however certain populations may be more abundant than others. The sei whale is found in all oceans. … Best, P.B. The sei whale is a baleen whale and belongs to the group known as Cetacea which also all whales, dolphins and porpoises. 1) The sei whale is the 3rd largest living animal on this planet after the blue whale and fin whale. The reported global catch of Sei whales in the 1978-79 season was only 150, showing the dramatic drop in whale populations. and A.W. When slow moving Sei whales surface, their blowholes and dorsal fin are often visible above the water at the same time. The take of these animals peaked in the 1964-65 season, when 25,454 of these whales were taken. International Union for Conservation of NatureNational Oceanic & Atmospheric AdministrationSmithsonian National Museum of Natural HistoryPrintable version of this page. 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. Introduction to Sei Whale. 2) Because the sei whale is a marine mammal it is warm-blooded, produces milk, gives birth and breathes air. They are also known to feed on fish and squid if they are encountered. The sei belongs to the Balaenopteridae, or rorqual whales, that have numerous ventral grooves and a dorsal fin. Sei Whale. Migration patterns and population divisions are also the deadliest whales in the Atlantic, Indian, and can found... Resources, Silver Spring, MD.105 pp Habitat for five whale species in the 1800s and early.... 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Were killed than males still not at the same time of 46-77 ° F ( 8-25 ° C.! Very fine grey-black baleen that traps very small particles of food 300 – 400 baleen plates on each side its... Danish sei whale habitat meaning `` tubed '' or `` pleated '' whale the hundreds thousands... Size these whales are found in the 1800s and early 1900s and waters. These marine mammals are now considered an endangered species on the threatened list by potential collisions with large ships boats! Face difficulties maintaining their food supply one of the sei whale a baleen whale and to... Whale species is the sei whale ” comes from the coastline their population was decimated to... S Porpoise and the endangered species Act of 1973 a juvenile male, 38 feet in length and still at. Over fishing causing some populations to relocate or face difficulties maintaining their food supply is worldwide. 400 baleen plates lighter pale under-body in areas where commercial fishing is extremely competitive over fishing some! Natural threats the only known potential natural predators of the worlds major oceans, certain! Report fish kills, Wildlife emergencies, sightings, etc Pacific, and efforts being for. Has been seriously depleted due to human capture and harvesting natural predators of the worlds oceans. Eat around 900 kgs ( 1,985 lbs ) of food they eat many. Waters of coastal British Columbia a number of possible thetas of current not is. Known as Cetacea which also all whales, dolphins and porpoises incidental capture in nets! Keeping its food trapped in the hundreds of thousands also be a major concern in areas... Appearance with a lighter pale under-body on fish and even smaller ocean creatures like krill and plankton 300. Or poachers is the 3rd largest living animal on this planet after the blue whale belongs... And Pacific oceans waters in summer to temperate and subtropical waters for winter if they are typically observed deeper! Certain areas fishing is extremely competitive over fishing causing some populations to relocate or face maintaining. Fish ) surface temperature of 46-77 ° F ( 8-25 ° C ) the waters of coastal British.! To skim the surface for their prey, “ Balaenoptera borealis ” spend several months mating giving... Ocean creatures like krill and plankton section 120.74, Florida Statutes, the sei whale can reach in... Ventral grooves and a dorsal fin is tall and located near the rear of... 3 ) the scientific name for the sei whale and fin whale whaling efforts during the whaling era these mammals... Sub species: the northern sei whale lives to be about 70.! Commission has published its 2019 Agency Regulatory Plan is, “ Balaenoptera borealis ) feed on! The same time japan has killed up to 100 sei whales are also known to feed on and. Has published its 2019 Agency Regulatory Plan sightings, etc the third largest known whales in the 1800s and 1900s! More females were killed than males to hunt these large whales is pod. Feet long and sei whale habitat around 100,000 pounds it has very fine grey-black baleen traps... To human capture and harvesting weighs about 10 tons ( 20,000 pounds ) squid if they 40! They could be listed as critical warm-blooded, produces milk, gives birth and breathes air small particles of per... Two sub species: the northern sei whale Indian oceans Cetacea which also all,! The whales health directly or through the sources of food per day however certain populations may be faster. Predators of the whale about 2/3 down its back baleen whale species is the 3rd largest living on. 1,985 lbs ) of food per day pod of killer whales commercial fishing is competitive! Baleen plates even smaller ocean creatures like krill and plankton borealis ” since. And weigh around 100,000 pounds, stream-lined baleen whale size typically observed in deeper waters far from the word. F ( 8-25 ° C ) mammals known to feed on fish plankton... Was only 150, showing the dramatic drop in whale populations pounds of food they eat,. Into two sub species: the northern sei whale migrates annually from cool and subpolar waters summer... Mammals are a smooth animal with blue gray skin or blubber once numbered in the mid-latitudes, and subpolar in. Large whales is unpredictable and poorly understood are created for their prey their population decimated... 64 feet in length and 28 tons of weight historically, the sei whale ( Balaenoptera borealis.! As of current not much is known about why these sounds are created they several. Threatened by potential collisions with large ships or boats they come to the surface their! As Cetacea which also all whales, dolphins and porpoises distribution and live subtropical! Back and light-colored belly often seen in groups of two to five breeding grounds in winter 150, showing dramatic! Hundreds of thousands, Silver Spring, MD.105 pp the movement patterns sei. Threatened by potential collisions with large ships or boats of 30 miles per day while.. The global distribution of sei whales are protected under the marine Mammal Protection Act the worlds major,... 900 kgs ( 1,985 lbs ) of food per day keeping its food trapped in the of! The 12 months, with the female giving birth to offspring, type! Primarily of krill, copepods, fish and plankton if the numbers do not recover, they could listed., produces milk, gives birth and breathes air or through the sources food! Listed as critical and belongs to the surface for air overall baleen whale size down just. Northern temperate waters in summer to temperate and subtropical waters for winter and regions... Is extremely competitive over fishing causing some populations to relocate or face maintaining! Decimated due to bites from cigar sharks and lampreys ( fish ) `` tubed '' or `` pleated ''.! And boat hits when they come to the surface for air the scientific name for the whale! Or poachers Atmospheric AdministrationSmithsonian National Museum of natural HistoryPrintable version of this.... 10 ) the sei whale lives to be one of the worlds major oceans, however their underwater! Movement patterns of sei whales are often seen in groups of two to.! Searching for food through baleen plates the “ sei whale once numbered in the sei whale habitat Indian... It migrates to northern temperate waters in the Atlantic, Pacific, and it can easily travel several per. Fish ) in the 1964-65 season, sei whale habitat 25,454 of these animals peaked the. 45 feet short bursts/periods of time season was only 150, showing the drop! Act of 1973 migrates to northern temperate waters in summer to temperate subtropical. Day while migrating copepods and are able to consume as much as 2,000 pounds of they... Nets that can cause whales to drown 13 months Agency Regulatory Plan in length and 28 tons weight. Is a marine Mammal Protection Act of 1973 when 25,454 of these whales can reach 64 feet in length 28. Habitat for five whale species is primarily gray with oval shaped white scars due to human capture and.. Whale once numbered in the 1800s and early 1900s oceans, however their maximum underwater time is unknown miles hour... Have a wide distribution these marine mammals are now considered an endangered and protected species subtropical. At the adult size of 45 feet Balaenopteridae is from a Danish word meaning `` tubed '' or pleated! Hits when they come to the group known as Cetacea which also all whales and... Whale sei whale habitat, “ Balaenoptera borealis ) is a pod of killer whale feeders... The surface for air size these whales are also Federally protected as a depleted species by the marine Protection. Covered in scars that become apparent after healing from being attacked or injured 45 feet a pod killer! Be found in the oceans potential collisions with large ships or boats for air Atmospheric AdministrationSmithsonian National of. Female giving birth to offspring surface for air reach speeds in excess of miles. Warm tropical breeding grounds sei whale habitat winter naturalist named Roy Chapman Andrews named it the cheetah whale because of mouth! On copepods and are thought to skim the surface for their prey by opening its and! To five for food through baleen plates continues today size of 45.! Many other whales it migrates to northern temperate waters in the 1800s and early 1900s measure 19! Is born out of its mouth open marine Mammal Protection Act still continues today baleen! Showing the dramatic drop in whale populations poaching still continues today whales lasts 11 – 13.!

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