Everything about Gigantothermy totally explained
Gigantothermy is a phenomenon with significance in
biology and
paleontology, whereby large, bulky
ectothermic (cold-blooded) animals are more easily able to maintain a constant, relatively high
body temperature than smaller animals by virtue of their greater
volume to
surface area ratio. 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.
The phenomenon is important in the biology of ectothermic
megafauna, such as large
turtles (particularly the
leatherback sea turtle), and aquatic reptiles like
ichthyosaurs and
mosasaurs. It is also present in certain large fish, most notably the
great white shark. Gigantotherms, though almost always ectothermic, generally have a body temperature and
metabolic rate similar to that of
endotherms.
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