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Gigantothermy
Gigantothermy
Published: 2016/08/31
Channel: WikiWikiup
Gigantothermy
Gigantothermy
Published: 2015/03/21
Channel: J.P. Anderson - Topic
How to Pronounce Gigantothermy
How to Pronounce Gigantothermy
Published: 2015/03/07
Channel: Pronunciation Guide
Overwatch Temple of Anubis Glitch
Overwatch Temple of Anubis Glitch
Published: 2018/01/04
Channel: Gigantothermy
Episode 1: SUE
Episode 1: SUE's really big butt
Published: 2016/02/25
Channel: discoverycentre1215
Poikilothermy & How it is achieved ? Cold Blooded or Warm Blooded
Poikilothermy & How it is achieved ? Cold Blooded or Warm Blooded
Published: 2017/06/17
Channel: Hussain Biology
Pacific Leatherback Sea Turtles
Pacific Leatherback Sea Turtles
Published: 2014/07/14
Channel: Thankyouocean
Baby Galápagos tortoises, Darwin Research Station, Santa Cruz Island, Galápagos Islands, Ecuador
Baby Galápagos tortoises, Darwin Research Station, Santa Cruz Island, Galápagos Islands, Ecuador
Published: 2013/05/29
Channel: Pietro Pecco
Gibson Atherton
Gibson Atherton
Published: 2016/08/31
Channel: WikiWikiup
Galápagos tortoise, Charles Darwin Research Station, Santa Cruz Island, Galápagos Islands, Ecuador
Galápagos tortoise, Charles Darwin Research Station, Santa Cruz Island, Galápagos Islands, Ecuador
Published: 2013/05/29
Channel: Pietro Pecco
Galápagos tortoises, Charles Darwin Research Station, Santa Cruz Island, Galápagos Islands, Ecuador
Galápagos tortoises, Charles Darwin Research Station, Santa Cruz Island, Galápagos Islands, Ecuador
Published: 2013/05/29
Channel: Pietro Pecco
Giant current ripples
Giant current ripples
Published: 2016/08/31
Channel: WikiWikiup
Baby Galápagos tortoises, Darwin Research Station, Santa Cruz Island, Galápagos Islands, Ecuador
Baby Galápagos tortoises, Darwin Research Station, Santa Cruz Island, Galápagos Islands, Ecuador
Published: 2013/05/29
Channel: Pietro Pecco
Tortuga laud | El visitante de todos los mares| (Animales del Mundo) |Mes playero|
Tortuga laud | El visitante de todos los mares| (Animales del Mundo) |Mes playero|
Published: 2016/07/22
Channel: Cityanimal
Galápagos tortoises, Charles Darwin Research Station, Santa Cruz Island, Galápagos Islands, Ecuador
Galápagos tortoises, Charles Darwin Research Station, Santa Cruz Island, Galápagos Islands, Ecuador
Published: 2013/05/29
Channel: Pietro Pecco
Galápagos tortoise, Charles Darwin Research Station, Santa Cruz Island, Galápagos Islands, Ecuador
Galápagos tortoise, Charles Darwin Research Station, Santa Cruz Island, Galápagos Islands, Ecuador
Published: 2013/05/29
Channel: Pietro Pecco
Dyer Island
Dyer Island
Published: 2015/03/21
Channel: J.P. Anderson - Topic
Ferocius Man Eater?
Ferocius Man Eater?
Published: 2015/03/21
Channel: J.P. Anderson - Topic
Gaans Bay, South Africa
Gaans Bay, South Africa
Published: 2015/03/21
Channel: J.P. Anderson - Topic
How to Pronounce Haematachometers
How to Pronounce Haematachometers
Published: 2015/03/07
Channel: Pronunciation Guide
Sea Turtles of the San Francisco Bay Area - Golden Gate Brown Bag Lunch Presentation
Sea Turtles of the San Francisco Bay Area - Golden Gate Brown Bag Lunch Presentation
Published: 2012/03/29
Channel: SFNPS Science and Learning
How to Pronounce Handsomes
How to Pronounce Handsomes
Published: 2015/03/07
Channel: Pronunciation Guide
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WIKIPEDIA ARTICLE

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Gigantothermy (sometimes called ectothermic homeothermy or inertial homeothermy) is a phenomenon with significance in biology and paleontology, whereby large, bulky ectothermic animals are more easily able to maintain a constant, relatively high body temperature than smaller animals by virtue of their smaller surface area to volume ratio.[1] A bigger animal has proportionately less of its body close to the outside environment than a smaller animal of otherwise similar shape, and so it gains heat from, or loses heat to, the environment much more slowly.[2]

The phenomenon is important in the biology of ectothermic megafauna, such as large turtles, and aquatic reptiles like ichthyosaurs and mosasaurs.[citation needed] Gigantotherms, though almost always ectothermic, generally have a body temperature similar to that of endotherms.[citation needed] It has been suggested that the larger dinosaurs would have been gigantothermic, rendering them virtually homeothermic.[3]

Negative effects[edit]

Gigantothermy allows animals to maintain body temperature, but is most likely detrimental to endurance and muscle power as compared with endotherms due to decreased anaerobic efficiency.[4] Mammals' bodies have roughly four times as much surface area occupied by mitochondria as reptiles, necessitating larger energy demands, and consequently producing more heat to use in thermoregulation. An ectotherm the same size of an endotherm would not be able to remain as active as the endotherm, as heat is modulated behaviorally rather than biochemically. More time is dedicated to basking than eating.

Positive effects[edit]

Large ectotherms displaying the same body size as large endotherms have the advantage of a slow metabolic rate, meaning it takes reptiles longer to digest their food. Subsequently gigantothermic ectotherms would not have to eat as often as large endotherms that need to maintain a constant influx of food to meet energy demands. Although lions are much smaller than crocodiles, the lions must eat more often than crocodiles because of their higher metabolic output necessary to maintain the lion's heat and energy. The crocodile must only lay in the sun to digest more quickly and create ATP.

See also[edit]

References[edit]

External links[edit]

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