Diapause
Diapause (pronounced: /ˈdaɪəˌpɔːz/) is a period of suspended development and growth accompanied by decreased metabolism in insects and some other animals. It is a survival strategy that allows these organisms to survive unfavorable environmental conditions.
Etymology
The term "diapause" is derived from the Greek words "dia", meaning "through", and "pausis", meaning "stop". It was first used in the early 20th century to describe the phenomenon observed in insects.
Overview
Diapause is a physiological state of dormancy with very specific and often complex physiological and biochemical characteristics. It is typically induced by environmental signals, such as changes in day length, temperature, or food availability, allowing the organism to survive periods of harsh conditions.
Types of Diapause
There are three main types of diapause:
- Prediapause: This is the period before diapause when the organism prepares for the dormant state.
- Diapause proper: This is the actual period of dormancy.
- Postdiapause: This is the period after diapause when the organism resumes its normal activities.
Related Terms
- Dormancy: A state of suspended physical functions observed in various forms of life.
- Hibernation: A state of inactivity and metabolic depression in endotherms.
- Estivation: A state of dormancy during hot or dry periods.
- Brumation: A state of dormancy in reptiles similar to hibernation.
See Also
External links
- Medical encyclopedia article on Diapause
- Wikipedia's article - Diapause
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