One of the Baleen Whale species is the Sei Whale. Photo courtesy of Christin Khan from NOAA. An average sei whale eats about 1,984 pounds of food each day, eating mostly small fish and other organisms. ), then average sized sei whale requires about 900 kg of food daily. Are Sei Whales social? Once in a while a good food spot will be used by larger groups, and up to 100 sei whales have been seen in a limited area. I/daily ration"=;:0.11 (const. What do sei whales eat? The krill is the primary consumer and the krill eats the phytoplankton. 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. It inhabits most oceans and adjoining seas, and prefers deep offshore waters. FOOD AND FEEDING OF SEI WHALE 221 Pacific between 50°N and 60°N must be quite natural as well as the case of many other fisheries in that region. In the eastern north Pacific, the reported take of sei whales by commercial whalers totaled 61,500 between 1947 and 1987. Instead it stays near the surface of the water, swimming on its side through clouds of krill or other prey. Life history: Sei whales reach sexual maturity by 10 years of age although adult size may not be attained until 25 years. It is ranked #3 in terms of overall Baleen Whale size. The other rorquals are: blue, fin, Bryde's and minke. Threats to Sei Whales. Sei Whales will eat about 900kg of food per day. This is believed to be one of the fastest of all whales, and it can easily travel several miles per day while migrating. Natural enemies of sei whales are killer whales and humans. Sei whales are relatively shallow divers, staying under from 5 to 15 minutes. After fin and blue whale populations were exhausted, Sei whales became the target of whalers in the 1950s and 1960s and the population was severely depleted. A right whale "grazes" by swimming slowly through swarms of small zooplankton (animal plankton) with its mouth open. spiked to over 500 whales a year, after populations of blue and fin whales had been reduced by overharvesting. To explain this the producer in the sei whale food chain is the phytoplankton. Large pods (50 or more sei whales) can be seen in areas that provide plenty of food. Method of Collecting and Eating Food. Sei whale. The local distribution is probably related to the location of the whale's food source, and sei whales are well known for their sudden "invasions" of an area to … The sei whale ( or ), Balaenoptera borealis, is a baleen whale, the fourth-largest rorqual after the blue whale, the fin whale and the humpback whale. The sei belongs to the Balaenopteridae, or rorqual whales, that have numerous ventral grooves and a dorsal fin. Daily dietary intake for a sei whale is estimated at 1 ton. Sei whale is solitary creature that occasionally travels in small groups (pods) composed of 2 to 3 (up to 6) animals. Baleen whales, however, are … Introduction to Sei Whale. Sei whales don’t gulp-feed like the other whales in their family. Starting in 1962, the number of sei whales targeted by whalers in B.C. Blubber makes up 27% of a blue whale's body weight, 23% of a fin whale, 21% of a sei whale, 29% of a gray whale, and 36% to 45% of a right whale. They also feed on small fish and squid. The figures both amout of stomach contents and daily ration in sei whale lead to a considera­ Much accumulations of whales are usually expected in these seas during warm season. Phytoplankton is a single celled plant that lives in the ocean. The sei whales position in the food web would be a secondary consumer. Balaenopteridae is from a Danish word meaning "tubed" or "pleated" whale. Binomial name: Balaenoptera borealis, René Primevère Lesson, 1828. 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