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Sustained energy output of an endothermic animal and an ectothermic animal as a function of core temperature This image shows the difference between endotherms and ectotherms. The mouse is endothermic and regulates its body temperature through homeostasis.
Endotherms cannot, in general, afford such long periods without food, but suitably adapted ectotherms can wait without expending much energy. Endothermic vertebrate species are therefore less dependent on the environmental conditions and have developed a higher variability (both within and between species) in their daily patterns of activity.
In general, warm-bloodedness refers to three separate categories of thermoregulation.. Endothermy [a] is the ability of some creatures to control their body temperatures through internal means such as muscle shivering or increasing their metabolism.
In biology, thermoregulation is the ability of an organism to maintain its body temperature, and the term "endotherm" refers to an organism that can do so from "within" by using the heat released by its internal bodily functions (vs. an "ectotherm", which relies on external, environmental heat sources) to maintain an adequate temperature. [14]
Kleptothermy is observed, particularly amongst juveniles, in endotherms such as bats [36] and birds (such as the mousebird [37] and emperor penguin [38]). This allows the individuals to increase their thermal inertia (as with gigantothermy) and so reduce heat loss. [39] Some ectotherms share burrows of ectotherms. Other animals exploit termite ...
J.S. Alho and colleagues argued in 2011 that, although Allen's rule was originally formulated for endotherms, it can also be applied to ectotherms, which derive body temperature from the environment. In their view, ectotherms with lower surface area-to-volume ratios would heat up and cool down more slowly, and this resistance to temperature ...
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It may or may not be reciprocal, and occurs in both endotherms and ectotherms. [1] One of its forms is huddling. However, kleptothermy can happen between different species that share the same habitat, and can also happen in pre-hatching life where embryos are able to detect thermal changes in the environment.