Blubber is a thick layer of vascularized fat found under the skin of all cetaceans, pinnipeds and sirenians.cite web | url= | title= What is Blubber?]


Lipid-rich, collagen fiber-laced blubber comprises the hypodermis [Struntz DJ et al. "Blubber development in bottlenose dolphins (Tursiops truncatus)." PubMed. From ] and covers the whole body, except for parts of the appendages, strongly attached to the musculature and skeleton by highly organized, fan-shaped networks of tendons and ligaments. It can comprise up to 50% of the body mass of some marine mammals during some points in their lives and can range from a couple of inches thick in dolphins and smaller whales, to more than a foot thick in some bigger whales, such as Right and Bowhead whales. However, this is not indictive of larger whales' ability to retain heat better, as the thickness of a whale's blubber does not significantly affect heat loss. More indictive of a whale's ability to retain heat is the water and lipid concentration in blubber, as water reduces heat retaining capacities, and lipid increases them. [cite web | author=P. H. Kvadsheim, a, b, , L. P. Folkowb, a and A. S. Blixb, a | url= | title=Thermal conductivity of minke whale blubber]


Blubber serves several different functions. it is the primary location of fat on some mammals, and is essential for storing energy. It is particularly important for species which feed and breed in different parts of the ocean. During these periods the species are operating on a fat-based metabolism. Recent research also shows that blubber may save further energy for marine mammals such as dolphins in that it adds bounce to a dolphin's swim [cite web| url= |title= Science Update--Bouncy Blubber] .

Blubber is, however, different from other forms of adipose tissue in its extra thickness, which allows it to serve as an efficient thermal insulator, making blubber essential for thermoregulation. Blubber is also more vascularized, or rich in blood vessels, than other adipose tissue.

Blubber has advantages over fur (as in Sea Otters) in the respect that although fur can retain heat by holding pockets of air, the air pockets will be expelled under pressure (while diving). Blubber, however, does not compress under pressure. It is effective enough that some whales can dwell in temperatures as low as -40 degrees Fahrenheit. [cite web | url= | title= Secrets of the Ocean Realm] While diving in cold water, blood vessels covering the blubber constrict and decrease blood flow, thus increasing blubber's efficiency as an insulator. [Don Galbraith et al. "Biology 11." (Canada: McGraw-Hill Ryerson). pg. 12.]

Blubber can also aid in buoyancy, and acts to streamline the body because the highly organized, complex collagenous network supports the non-circular cross sections characteristic of cetaceans.

Research [cite web | author= Dunkin, Robin et al| title="The ontogenetic changes in the thermal properties of blubber from Atlantic bottlenose dolphin Tursiops truncatus" | publisher="Journal of Experimental Biology" | accessdate=03-05-2005 | url=] into the thermal conductivity of the common bottlenose dolphin's blubber reveals that its thickness varies greatly amongst individuals. However, blubber from emaciated dolphins is much worse of an insulator than that of non-pregnant adults, which in turn have a higher heat conductivity than blubber from pregnant females and pre-adults.

Human Influences


Muktuk, (the Inuit/Eskimo word for blubber) formed an important part of the traditional diets of the Inuit and other northernly peoples because of its high energy value.cite web | url= | title= What is Blubber?] Seal blubber has large amounts of Vitamin E, selenium, and other anti-oxidants that hinder oxidation, which slows the formation of the free radicals that start a wide variety of diseases. The positive effects of consuming blubber can be seen in Greenland; in Uummannaq for example, a hunting district with 3000 residents, no deaths due to cardiovascular diseases occurred in the 1970s. However, emigrants to Denmark have contracted the same diseases as the rest of the population. The average 70-year-old Inuit with a traditional diet of whale and seal has arteries as elastic as that of a 20-year-old Danish resident. [cite web | url=| title= Orsoq - Eat Meat and Blubber from Sea Mammals and avoid Cardiovascular disease.]

One of the major reasons for the whaling trade was the collection of whale blubber. This was rendered down into oil in try pots or later, in vats on factory ships. The oil could be then used in the manufacture of soap, leather, and cosmetics. [cite encyclopedia | last = Donovan | first = Greg | title = Whaling | encyclopedia = Microsoft Encarta | date = 2008] Whale oil was also used in candles as wax, and in oil lamps as fuel.

Blue whales can yield blubber harvests up to 50 tons. [cite encyclopedia | title = Cetacean | encyclopedia = Encyclopædia Britannica. Ultimate Reference Suite | date = 2008]


Recent studies suggest that blubber contains naturally occurring PCB, which are cancer causing and damage the human nervous, immune and reproductive systems. [cite web | url=­/releases/2005/02/050213132247.htm | title=Chemical Compounds Found In Whale Blubber Are From Natural Sources, Not Industrial Contamination] [cite web | url= | title=Japan warned on 'contaminated' blubber] . It is not known where the source of this PCB is. Since toothed whales typically place high on the food chain, they are bound to consume large amounts of industrial pollutants. Even baleen whales, by merit of the huge amount of food they consume, are bound to have toxic chemicals stored in their bodies. Recent studies have found high levels of mercury in the blubber of seals of the Canadian Arctic.

Works Cited


#cite web
title= Education Resources for Teachers--Blubber Experiment

#cite web
title= Arctic Facts-Blubber

ee also

*Adipose tissue

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, (so as to swell the cheeks), , ,

Look at other dictionaries:

  • Blubber — Blub ber, n. [See {Blobber}, {Blob}, {Bleb}.] [1913 Webster] 1. A bubble. [1913 Webster] At his mouth a blubber stood of foam. Henryson. [1913 Webster] 2. The fat of whales and other large sea animals from which oil is obtained. It lies… …   The Collaborative International Dictionary of English

  • blubber — Ⅰ. blubber [1] ► NOUN ▪ the fat of sea mammals, especially whales and seals. DERIVATIVES blubbery adjective. ORIGIN originally denoting the foaming of the sea: perhaps symbolic. Ⅱ. blubber [2] …   English terms dictionary

  • Blubber — Blub ber, v. i. [imp. & p. p. {Blubbered}; p. pr. & vb. n. {Blubbering}.] To weep noisily, or so as to disfigure the face; to cry in a childish manner. [1913 Webster] She wept, she blubbered, and she tore her hair. Swift. [1913 Webster] …   The Collaborative International Dictionary of English

  • Blubber — Blub ber, v. t. 1. To swell or disfigure (the face) with weeping; to wet with tears. [1913 Webster] Dear Cloe, how blubbered is that pretty face! Prior. [1913 Webster] 2. To give vent to (tears) or utter (broken words or cries); with forth or out …   The Collaborative International Dictionary of English

  • Blubber —   [ blʌbə; englisch »Tran«, »Speck«] der, s, Bezeichnung für Walspeck …   Universal-Lexikon

  • blubber — vb *cry, weep, wail, keen, whimper …   New Dictionary of Synonyms

  • blubber — blubber1 [blub′ər] n. [ME blober, a bubble; prob. of echoic orig.: see BLEB] 1. the fat of the whale and other sea mammals, from which an oil is obtained 2. Informal unsightly fat on the human body blubber2 [blub′ər] vi. [ME bloberen, to bubble:… …   English World dictionary

  • Blubber — Wal Blubber Als Blubber (von engl. blubber: Walspeck, Fischtran) wird die mehrere Zentimeter dicke Fettschicht von Walen und Robben bezeichnet. Da Wale im Gegensatz zu anderen Säugetieren kein Fell besitzen, das sie warm hält, benötigen sie eine… …   Deutsch Wikipedia

  • blubber — blub|ber1 [ˈblʌbə US ər] v also blub [blub] [Date: 1400 1500; Origin: blubber [i] to make a bubbling sound (14 18 centuries), from blubber bubble ; BLUBBER2] to cry noisily, especially in a way that annoys people blubber 2 blubber2 n [U] [Date:… …   Dictionary of contemporary English

  • blubber — {{11}}blubber (n.) late 14c., blober a bubble, bubbling water; foaming waves, probably echoic of bubbling water. Original notion of bubbling, foaming survives in the figurative verbal meaning to weep, cry (c.1400). Meaning whale fat first… …   Etymology dictionary

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