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Aestivation (Latin: aestas (summer); also spelled estivation in American English) is a state of animal dormancy, similar to hibernation, although taking place in the summer rather than the winter. Aestivation is characterized by inactivity and a lowered metabolic rate, that is entered in response to high temperatures and arid conditions. [ 1 ]
Aestivation, also spelled estivation, is an example of consequential dormancy in response to very hot or dry conditions. It is common in invertebrates such as the garden snail and worm but also occurs in other animals such as lungfish, salamanders, desert tortoises, and crocodiles.
Some marine animals do go through periods of dormancy, but the effect is stronger and more widespread in terrestrial environments. As hibernation is a seasonal response, the movement of the ancestor of birds and mammals onto land introduced them to seasonal pressures that would eventually become hibernation. [ 46 ]
Top: A male ornate boxfish (aracana ornata). Bottom left: a close-up of the boxfish’s natural hexagonal pattern. Bottom center: fish pattern simulation based on Turing’s reaction-diffusion theory.
Animal faith is the study of animal behaviours that suggest proto-religious faith. It is commonly believed that religion and faith are unique to humans, [1] [2] [3] largely due to the typical dictionary definition of the word religion (see e.g. Wiktionary or Dictionary.com) requiring belief in a deity, which has not been observed in non-human animals. [4]
Heralded as the world's largest rodents, the South American rainforest natives can actually weigh as much as a full grown man.. But despite the fact that they apparently like to eat their own dung ...
Denise Richards has one movie that's off limits to her daughters. In PEOPLE's latest cover story, Richards, 54, opens up about how she feels if her children view her movies — and reveals why she ...
Rats are polyestrous animals that typically have rapid cycle lengths of 4 to 5 days. [22] Although they ovulate spontaneously, they do not develop a fully functioning corpus luteum unless they receive coital stimulation. Fertile mating leads to pregnancy in this way, but infertile mating leads to a state of pseudopregnancy lasting about 10 days.