Blue whale size

Blue whale size


  • Why Are Blue Whales So Gigantic?
  • Blue whale
  • How Big Is the Biggest Whale?
  • Fun Facts About Blue Whales
  • What Is The Total Length Of A blue whale?
  • 40 Fascinating Blue Whale Facts (From Size & Diet to Conservation)
  • Why Are Blue Whales So Gigantic?

    However, the distinctive blue-grey coloration and vast size of blue whales distinguishes them from all other whales. They can be found in both coastal and pelagic waters. Due to commercial whaling, their global population has been significantly reduced; at present it is unclear how many blue whales remain in the ocean due to their large range and dispersal, as well as low sampling efforts.

    In Canada, blue whales are present on the Pacific and Atlantic coasts. Through studying distinctive calls it is believe that there are at least two distinct populations within the North Pacific; one occupies the western and central North Pacific, while the other occupies the eastern North Pacific.

    In , researchers from DFO and Cascadia Research found 5 blue whales off Haida Gwaii Blue whales appear to be migratory, spending summer month in higher latitudes and winter in lower. Some tropical areas, however, have shown certain whales present year round, indicating possible non-migratory blue whales. They are capable of covering long distances in short periods of time; one animal was documented travelling from the Queen Charlotte Islands to the Santa Barbara Channel, a distance of km in 28 days or less.

    Researchers are able to identify individual blue whales by the pigmentation and mottling patterns on their flanks. Much of this photo-identification has taken place in California, a hotspot for blue whale sightings. Blue whales feed on zooplankton, most commonly a variety of euphasiid krill species, as well as some copepods.

    This allows them to expand their throat while feeding, and then expel salt water through their baleen, which acts as a food sieve. To feed, blue whales lunge through swarms of krill, sometimes on their side or back. This may be observed above water, but most surface-feeding probably happens at night, when krill concentrations rise in the water column. Due to their enormous size blue whales must eat several tons of zooplankton a day. This large energetic demand may mean their range and recovery is constrained by food availability.

    Climate change and other oceanographic shifts may greatly affect zooplankton and, therefore, the blue whale. The majority of feeding happens in high latitude water, usually in productive upwellings along the continental shelf break. For example, females and calves are often spotted in the Gulf of California, Mexico.

    Females have a gestation of months and will nurse for months. Most likely, the calves are weaned in the summer on the feeding grounds. Females and males reach sexual maturity between 5 and 15 years of age, and a female has a birthing interval of years. The vocalization of a blue whale may be the loudest sound made by an animal.

    Most of their calls are low frequency and infrasonic; the human ear does not hear them. These types of calls can travel huge distances ss of kilometers and are well-suited for an animal that has such a large dispersal, enabling communication between animals very far apart.

    Acoustics are increasingly being used to understand the range of the blue whale and to some degree, their abundance. Off British Columbia, blue whale calls are most consistently heard between October and February. Researchers approach a blue whale to obtain photos and DNA samples It is unclear exactly how many blue whales would have been present in the North Pacific prior to whaling. However, it is estimated that blue whales were taken from north Pacific by commercial whalers.

    In BC, at least blue whales were killed between and Blue whales may be preyed upon by killer whales, though this is thought to be an unusual occurrence in most of their range. Status in Canada The rarity of sightings visual and acoustic suggests their numbers are currently very low significantly less than mature individuals.

    Threats for blue whales along the coast of British Columbia are unknown, but may include ship strikes, pollution, entanglement in fishing gear, and long-term changes in climate which could affect the abundance of their zooplankton prey.

    The population was reduced by whaling. Knowlton, J. Mead, A. Collet, M. Collisions between ships and whales. Marine Mammal Science 17 1 : Berube, M. A new hybrid between a blue whale, Balaenoptera musculus, and a fin whale, b. Marine Mammal Science 14 1 : Calambokidis, J. Abundance of blue and humpback whales in the eastern North Pacific estimated by capture-recapture and line-transect methods.

    Marine Mammal Science 20 1 : Nichol, J. Ford, G. Ellis and A. Migration and population structure of northeastern Pacific whales off coastal British Columbia: An analysis of commercial whaling records from Marine Mammal Science 16 4 : Mate, B.

    Lagerquist and J. Marine Mammal Science Sears, R. In: Perrin, W. Thewissen eds. Encyclopedia of Marine Mammals. Academic Press, San Diego. Predictions of critical habitat for five whale species in the waters of coastal British Columbia. Canadian Journal of Fisheries and Aquatic Sciences 58 7 Oleson, E. Barlow, and J. Blue whale visual and acoustic encounter rates in the southern California Bight. Marine Mammal Science 23 3 : Abundance of blue and humpback whales in the eastern north Pacific estimated by capture-recapture and line-transect methods.

    Douglas, E. Falcone, and L. Final report: Abundance of blue whales off the US west coast using photo identification. Report to the Southwest Fisheries Science Centre. Cascadia Research.

    Cetacean Sightings Network is partially funded by the Government of Canada.

    Blue whale

    The blue whale is one of the most amazing animals on this earth. It also happens to be the largest living animal currently in existence. In fact the blue whale is so large that some researchers and marine biologists believe that the blue whale is the largest animal to have ever roamed the earth; this also includes the largest known dinosaurs that inhibited the planet millions of years ago.

    Even from birth the blue whale is a large animal with some baby whales having been known to be born at lengths of up to 25 ft. Surprisingly, a baby blue whale can consume up to gallons of milk per day during its first year of birth! When fully matured the blue whale can reach lengths in excess of ft. Most blue whales however are considerably smaller and lighter in size at an average length of 70 — 90 ft.

    In regards to the largest known blue whale to have ever lived on earth various estimates ranging from ft — ft. The largest scientific measurement officially recorded is around ft. At an average weight of tons , — , pounds on average or more these whales are also considered one of the heaviest creature to have ever lived on earth.

    Despite being a massive marine mammal though the blue whale feeds primarily on a diet consisting of krill a tiny animal that averages less than 2 inches. In order to consume enough calories the blue whale can consume up to 40 million krill 8, lbs.

    Here are several other comparisons to stress just how large blue whales really are: The Largest Dinosaur Amphicoelias — The largest dinosaur ever recorded is believed to have reached lengths of ft — ft when fully matured and weigh around tons.

    The Largest Land Animal In Current Existence The African Elephant — Currently the largest living land animal in existence can grow to a height of 7 ft — 13 ft and weigh over 13, pounds Maximum weight is around 27, pounds.

    Bonus: Despite the massive size of these creatures they would never be able to swallow a human. In fact the blue whales throat is about the size of a beach ball or dinner plate less than 12 inches.

    Because of its small throat this whale survives primarily on a diet consisting of krill small shrimp — like creatures. Post navigation.

    How Big Is the Biggest Whale?

    The deepest dive recorded by a Cuvier's beaked whale is 2,m just under 3km or 2 miles below the surface of the ocean in southern California. Top predator At the very top of all food chains or food pyramids are carnivores. The absolute top, gold-medal winning oceanic predator, above sharks even, is a dolphin — the orca. Orcas have even been recorded attacking and killing great white sharks so they can eat their energy-rich livers.

    The only predator orcas really have to fear are humans. Who eats the most? Sperm whales are the biggest creature with teeth on Earth; the blue whale is much bigger, but is toothless. Male sperm whales are quite a bit bigger than females and grow to 18m 60ft in length and weigh up to 57 tonnes 57,kg.

    Sperm whales mostly hunt prey found on or near the ocean floor; giant, large and medium-sized squid are their favourite food. Largest mouth The Bowhead whalewhich lives in the arctic, has the largest mouth in the world; measuring 5m 16ft long, 4m 13ft high and 2.

    Fun Facts About Blue Whales

    Their mouths are steeply arched to accommodate their long baleen plates. When feeding, bowheads open their mouths and skim through the water. As the water flows through their mouths, it passes through the baleen and food tiny crustaceans gets trapped on the plates.

    Bowheads use their huge, thick, muscular tongues, which weigh about kg to wipe off the prey caught in their baleen plates, ready for swallowing.

    Longest mammal migration Baleen whales are long-distance travellers, and the champions amongst them include gray whales and humpback whales. These whales regularly make incredible annual journeys of between and miles to km each way, between their favoured cold water feeding grounds and their warm water breeding grounds. Some humpback whale populations have been found to journey even further than this, swimming between Antarctic waters where they feed, across the Equator to reach their coastal breeding sites in Colombia, Panama and Costa Rica.

    This is a round-trip of up to miles 11,km. Scientists tracked Vavara, a female gray whale, as she swam a round-trip of 13, miles 22,km in days.

    What Is The Total Length Of A blue whale?

    She migrated between the east coast of Russia to the gray whale breeding grounds in Mexico and back again. Smartest marine creature Although it is hard for scientists to agree on how best to measure intelligence and it is difficult to compare intelligence from one species to another, broadly speaking, intelligence can be defined as the ability to learn and apply knowledge; to understand new or challenging situations and the ability to think abstractly.

    Dolphins clearly demonstrate the ability to do all of these things and most scientists agree that dolphins are very intelligent creatures. Dolphins have a large brain. Large brain animals like humans, chimpanzees, and dolphins have a number of things in common. They generally live long lives. At this time, the formation of ice caps in winter was conducive to oceanic upwellings that bring huge quantities of nutrients to the surface, thereby creating areas of high prey density. Logically, this seasonal concentration of prey favoured the engulfment technique favoured by whales.

    The combination of this feeding technique with the appearance of upwelling was the magic formula behind the evolution of whales to their present-day size, concludes the research team led by Jeremy Goldbogen. The Ice Age contributed to the development of upwelling phenomena, which concentrates prey in dense schools. In a Scientific American article, biologist Eric M. While other whales are able to hunt different types of prey, the blue whale feeds exclusively on krill.

    To stumble upon booms of krill yet survive the inevitable busts, blue whales need extreme mobility and large energy reserves. They achieve these with enormous size, sleek bodies, and small, hydrodynamic flippers. But this gigantism has been achieved at the expense of manoeuvrability.

    40 Fascinating Blue Whale Facts (From Size & Diet to Conservation)

    Additionally, to effectively hunt krill and properly nourish its huge body, the blue whale compensates for the lack of agility with an even bigger mouth, and therefore an even bigger body. And this is the problem for our giants of the seas. Because an ecological niche as narrow as that of the blue whale is a double-edged sword. Of course, such a large size makes the species safe from most predators on the planet — notwithstanding humans.

    But such a high degree of specialization makes the blue whale very vulnerable to changes in its environment.


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