Hibernation and aestivation, Biology

Hibernation and Aestivation

Poikilotherms pass the winter in a resting state, known as hibernation. When they enter a resting state in response to heat or drought, the condition is called aestivation. In general Poikilotherms derive two types of benefit from the resting states that may enter during times of environmental stress.

First, by virtue of their special physiological state, the animals may enjoy an enhanced physiological ability to cope with the extreme conditions. (Example increased freezing resistance etc.) Second, they are often permitted to remain continuously in favourable microhabitats. Their metabolism is depressed to such an extent that the store of nutrients (example, body fat) can augment. The variety of mechanisms exploited by Poikilotherms in escaping some of the rigors of extreme temperatures may be divided into behavioural and physiological adaptations.

 

Posted Date: 1/16/2013 5:14:08 AM | Location : United States







Related Discussions:- Hibernation and aestivation, Assignment Help, Ask Question on Hibernation and aestivation, Get Answer, Expert's Help, Hibernation and aestivation Discussions

Write discussion on Hibernation and aestivation
Your posts are moderated
Related Questions
Does the environment exert an influence on the phenotype? A phenotype may be changed (compared to the original situation conditioned by its genotype) by nongenetic means. Examp

Systolic heart failure is a classic heart failure where the inotropic (contractile) state is impaired and the expulsion of blood is not adequate. So the main manifestations of syst

Determine about the Nervous System and Behaviour Damage to certain parts of the brain will be reflected as behaviour deficits. For example, damage to the temporal lobe may affe

Complete feed blocks For manufacturing the pellets, processes such as grinding, mixing, steaming and pressing and some times extruding, are applied using special and expensive

Before you solve the problem organize your thoughts on paper in the following manner. A) What will my answer look like? What units will I be using? B) What do I need to know

Q. What is represented by the cellular secretion? Cell secretion is the removal to the exterior of substances produced by the cell for instance, hormones, mucus, and sweat, so

Uses of Grafting Grafting helps to preserve and perpetuate varieties that cannot reproduce by vegetative method. Grafting changes less useful varieties to more desirable

Leptospirosis Leptospirosis is a general term that denotes all infections of man and animals caused by spirochaetes of the genus Leptospira. At one time, the infection had bee

What would the effect be if a cell made defective receptor tyrosine kinase protein that were unable to dimerize?

Regeneration - Root and Shoot Morphogenesis Higher plants have three kinds of regenerative activities; All plants possess inherent ability to regenerate lost parts. Fo