HOME >> BIOLOGY >> NEWS
How do animals exposed to 24-hour light retain their wake-sleep habits?

ere exposed to artificial continuous light and demonstrated the Aschoff effect, where the circadian activity pattern changes quantitatively with the intensity of the light. This group took on a 26-hour day.

This was not the case when the experiment was repeated in the field at the Naval Arctic Research Laboratory - with two species of Arctic rodents exposed to continuous daylight (nocturnal porcupines [Erethizon] N=4, and hibernators, the Arctic ground squirrel [Spermophilis] N=6). Under these circumstances, both species had a specific time of sleep and of wakefulness. In fact, the Arctic rodents, which had undergone 82 days of continuous sun above the horizon, had a crisp, 24-hour day-night rhythm of sleep and wakefulness.

Conclusions

The free-living animals in the Arctic had regular sleep-awake cycles, despite having 82 days of continuous sun. The intriguing question is whether or not these animals have found a clue in the external environment to take the place of the missing sunset. The researchers hypothesize that because the sun during this period is nearer the horizon at one part of the day, this might act as a clue for the biological clocks.

As the American economy requires its work force to abandon traditional work hours of "nine to five," it becomes more important for us to understand how the body's biological clock can respond to unnatural light clues and adapt to a changing environment. This study is another step in the continuing research towards such comprehension.


'"/>

Contact: Donna Krupa
djkrupa1@aol.com
703-527-7357
American Physiological Society
19-Apr-2004


Page: 1 2

Related biology news :

1. Sweet success in targeting sugar molecules to cells in living animals
2. The first engineering of cell surfaces in living animals
3. New comprehensive textbook on companion animals fills need
4. Why some animals have smaller eyes: Lifestyle matters
5. Social benefits of wound healing may not make any difference in animals with multiple partners
6. Firefly compound lights up protein dance in living animals
7. Japanese researchers develop novel method of introducing transgenes into animals
8. Researchers make promiscuous animals monogamous by manipulating genes
9. UIC researchers discover gene that causes liver cancer in animals
10. Mix of chemicals plus stress damages brain, liver in animals and likely in humans
11. Study in worms shows how genes linked to complexity in animals

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: How animals exposed hour light retain their wake sleep habits

(Date:10/15/2014)... Lithuania , Oct. 15, 2014   ... technologies, today announced the availability of the ... VeriLook Surveillance 3.0 provides real-time biometric face identification ... high-resolution digital surveillance cameras. The new version not ... and differentiates people from objects while they are ...
(Date:10/14/2014)... Research shows SIRT6—a protein known to inhibit the ... of skin cancers by turning on an enzyme that ... , Previously considered protective, SIRT6 is part of a ... genomic stability and prevent some of the genetic flaws ... can lead to cancer. This study, in the journal,s ...
(Date:10/14/2014)... N.Y. – Scientists have sequenced the house fly genome ... one might expect from an insect that thrives in ... published Oct. 14 in the journal Genome Biology ... biology and of how flies quickly adapt to resist ... Adult house flies (Musca domestica) carry and transmit more ...
Breaking Biology News(10 mins):VeriLook Surveillance 3.0 SDK Identifies Faces and Moving Objects, Differentiates Pedestrians from Other Moving Objects in Video Surveillance Systems 2VeriLook Surveillance 3.0 SDK Identifies Faces and Moving Objects, Differentiates Pedestrians from Other Moving Objects in Video Surveillance Systems 3Two-faced gene: SIRT6 prevents some cancers but promotes sun-induced skin cancer 2House fly genome reveals expanded immune system 2
(Date:10/20/2014)... MENLO PARK, Calif. , Oct. 20, 2014 ... announced today that the Company has signed a ... Institute of Regenerative Medicine (CIRM), effective October 1, ... of Clinical Development payments and the release of ... $14.3 million CIRM grant award for clinical development ...
(Date:10/20/2014)... (PRWEB) October 20, 2014 ... Sidney Kimmel Cancer Center at Thomas Jefferson University ... , Through the Strategic Alliance Partnership program, the ... will collaborate to raise awareness of the Center’s ... and other projects. Clinicians and other health care ...
(Date:10/19/2014)... Mass. , Oct. 19, 2014 NextCODE Health, ... the whole genome in real time, today announced the launch ... NextCODE Exchange , at the American Society of Human ... . To learn more, sign up and apply for free ... its unique features and benefits can be viewed here ...
(Date:10/19/2014)... 2014 The Asian Orthopedic braces and support ... with analysis and forecast of revenue. The Orthopedic braces and ... around $416.5 million by 2018, at a developing CAGR of ... of the Asian Orthopedic braces and support systems market, to ... provides a glimpse of the segmentation of orthopedic braces and ...
Breaking Biology Technology:Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 2Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 3Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 4Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 2Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 3The NextCODE Exchange: The first global, real-time system for sharing full-resolution genomic data 2The NextCODE Exchange: The first global, real-time system for sharing full-resolution genomic data 3The Asian Orthopedic braces and support systems market is estimated to grow to around $416.5 million by 2018 - New Report by MicroMarket Monitor 2The Asian Orthopedic braces and support systems market is estimated to grow to around $416.5 million by 2018 - New Report by MicroMarket Monitor 3The Asian Orthopedic braces and support systems market is estimated to grow to around $416.5 million by 2018 - New Report by MicroMarket Monitor 4
Cached News: