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. The sei whales position in the food web would be a secondary consumer. Starting in 1962, the number of sei whales targeted by whalers in B.C. Daily dietary intake for a sei whale is estimated at 1 ton. An average sei whale eats about 1,984 pounds of food each day, eating mostly small fish and other organisms. Photo courtesy of Christin Khan from NOAA. A right whale "grazes" by swimming slowly through swarms of small zooplankton (animal plankton) with its mouth open. 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. Instead it stays near the surface of the water, swimming on its side through clouds of krill or other prey. 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. Sei whale. It is ranked #3 in terms of overall Baleen Whale size. Method of Collecting and Eating Food. ), then average sized sei whale requires about 900 kg of food daily. spiked to over 500 whales a year, after populations of blue and fin whales had been reduced by overharvesting. Sei whales produce low-frequency, growl-like calls for communication. Life history: Sei whales reach sexual maturity by 10 years of age although adult size may not be attained until 25 years. Sei whales don’t gulp-feed like the other whales in their family. Natural enemies of sei whales are killer whales and humans. The krill is the primary consumer and the krill eats the phytoplankton. The sei is a baleen whale and they are usually divided into three families. One of the Baleen Whale species is the Sei Whale. Baleen whales, however, are … 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. Sei Whales sometimes travel solo, while others group into pods of up to 6 members. To explain this the producer in the sei whale food chain is the phytoplankton. 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. They also feed on small fish and squid. I/daily ration"=;:0.11 (const. Introduction to Sei Whale. The other rorquals are: blue, fin, Bryde's and minke. What do sei whales eat? The figures both amout of stomach contents and daily ration in sei whale lead to a considera­ Phytoplankton is a single celled plant that lives in the ocean. Large pods (50 or more sei whales) can be seen in areas that provide plenty of food. Food habits: Sei whales skim-feed on schools of planktonic crustaceans (mainly copepods but also amphipods and euphausids). Sei Whales will eat about 900kg of food per day. Sei whales are relatively shallow divers, staying under from 5 to 15 minutes. In the eastern north Pacific, the reported take of sei whales by commercial whalers totaled 61,500 between 1947 and 1987. Threats to Sei Whales. It inhabits most oceans and adjoining seas, and prefers deep offshore waters. Sei whale is solitary creature that occasionally travels in small groups (pods) composed of 2 to 3 (up to 6) animals. This is believed to be one of the fastest of all whales, and it can easily travel several miles per day while migrating. The sei belongs to the Balaenopteridae, or rorqual whales, that have numerous ventral grooves and a dorsal fin. Are Sei Whales social? Binomial name: Balaenoptera borealis, René Primevère Lesson, 1828. 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