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Aestivation

Definition

noun

(1) (botany) The arrangement of petals (as well as sepals) within a flower bud that is yet to open.

(2) (zoology) The lack of or slowing of activity and metabolism during hot, dry season such as summer; summer dormancy; prolonged and deep torpor during the hot, dry season.


Supplement

In botany, aestivation may be valvate, imbricate, plicate, or contorted.

In zoology, while hibernation refers to dormancy during the cold season, aestivation pertains to a state where some animals go through dormancy or lack of activity during the warm, arid season.


Word origin: Latin aestivare, from aestus, (heat).

Related form(s): aestivate (verb)

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Results from our forum


Re:

... environment is itself determined by the genome. The fact remains that changes that are not inherited do not constitute evolution. 2. The earthworm aestivation, obviously is a physiological regulation in the body, the force of hormones is greater than genes. We can still measure their adaptation ...

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by robsabba
Wed Nov 18, 2009 4:39 pm
 
Forum: Evolution
Topic: About Physiological Darwinism:From Fitness to Optimality
Replies: 13
Views: 17446

About Physiological Darwinism:From Fitness to Optimality

... can not be explained by the traditional genotype theory. These phenomena in fact "be selected and be not inherited." 2. The earthworm aestivation, obviously is a physiological regulation in the body, the force of hormones is greater than genes. We can still measure their adaptation ...

See entire post
by wellalt
Wed Nov 18, 2009 7:14 am
 
Forum: Evolution
Topic: About Physiological Darwinism:From Fitness to Optimality
Replies: 13
Views: 17446

Re: About Physiological Darwinism:From Fitness to Optimality

... I don't see how this example of the earthworm can't be easily explained by mainstream ideas about NS and adaptation.... The benefit is that aestivation enables individuals to reduce their demands on nutrition and energy, so that the earthworms can escape from unsuitable seasonal conditions. ...

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by Dougalbod
Mon Nov 16, 2009 12:07 pm
 
Forum: Evolution
Topic: About Physiological Darwinism:From Fitness to Optimality
Replies: 13
Views: 17446

Intraspecific Adaptation Biology: A New Separated Direction

... Dougal. Here is another one about that. Maybe better for your understanding. Intraspecific Adaptation Biology: A New Separated Direction Aestivation is an important period included within the life cycle of tropical earthworms. Almost all earthworm species display this mechanism as a response ...

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by wellalt
Sat Nov 14, 2009 12:35 am
 
Forum: Evolution
Topic: About Physiological Darwinism:From Fitness to Optimality
Replies: 13
Views: 17446


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