Navigation Links
Through evolution, cavefish have lost sleep
Date:4/7/2011

Cave life is known to favor the evolution of a variety of traits, including blindness and loss of eyes, loss of pigmentation, and changes in metabolism and feeding behavior. Now researchers reporting online on April 7 in Current Biology, a Cell Press publication, have added sleeplessness to that list.

"Cave-adapted fish sleep lessmuch lessthan closely related surface fish," said Richard Borowsky of New York University. "In some ways, their sleep phenotypes are similar to those of humans with sleep disorders."

The fish do sleep, but only for relatively short periods, Borowsky explained. Once they wake up, they remain active for a relatively long time. That sleep-and-wake cycle is repeated throughout the continued darkness of the cave.

The discovery was made by studying three cave populations of Mexican Blind Cave Fish (Astyanax mexicanus), a species ideal for such studies because it includes eyed surface and numerous blind cave populations. Although most of those cave populations have been founded independently by individuals living on the surface, they have nonetheless converged over the course of evolution on similar traits suitable to their new environments.

Borowsky and Erik Dubou, lead author of the study, got the idea that the transition from surface to cave might be associated with less sleep based on anecdotal, nighttime observations of fish in their laboratory. Their surface fish clearly sleep at night. They could be found inactive at the bottom of their tanks with fins drooping. The cavefish, on the other hand, actively patrol their laboratory homes through the wee hours.

To further study the basis of those behavioral differences, the researchers allowed surface and cave individuals to mate in the lab and studied their hybrid offspring. Those studies yielded evidence showing that cavefish differ from surface fish in sleep behavior because of a few dominant gene mutations that became fixed in the cave
'/>"/>

Contact: Elisabeth Lyons
elyons@cell.com
617-386-2121
Cell Press
Source:Eurekalert

Page: 1 2

Related biology news :

1. Major breakthrough in preventing premature birth announced by NIH/WSU
2. From science fiction to research breakthrough
3. The way to (kill) a bugs heart is through its stomach
4. No scalpel: Minimally invasive breakthrough for men’s enlarged prostates improves symptoms
5. Breakthrough in Niemann-Pick Type C research reported by Notre Dame and Cornell scientists
6. San Diego Zoo Global joins effort to conserve the Amazonian rain forest through Peru field station
7. Researchers looking at a rare disease make breakthrough that could benefit everyone
8. Cancer breakthrough to prevent heart failure and increase survival rates
9. Breakthrough on cystic fibrosis 1 step closer as new research alliance formed
10. Biomedical breakthrough: Blood vessels for lab-grown tissues
11. 7 CAMH scientists win Young Investigator awards focused on breakthrough research
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/9/2014)... cell divides, it must first make a copy of its ... that occurs billions of times a day in the human ... tools that cells use to replicate DNAthe enzymes that unzip ... a clear picture of how the process works. , Now, ... to decipher what goes on at the "replication fork"the point ...
(Date:7/8/2014)... reefs and the animals that depend on them relies ... sea creature to get fatand to be flexible about ... the first study of its kind, scientists at The ... live symbiotically with algaeare better able to recover from ... keep large energy reservesmostly as fatsocked away in their ...
(Date:7/8/2014)... increased risk of severe perineal tearing during childbirth in women ... a new study published today (9 July) in BJOG: ... This study, investigates among women who have had a third ... subsequent pregnancies and the recurrence of severe perineal tears. ... in some women the tear may be more extensive. A ...
Breaking Biology News(10 mins):Rockefeller scientists first to reconstitute the DNA 'replication fork' 2Rockefeller scientists first to reconstitute the DNA 'replication fork' 3Rockefeller scientists first to reconstitute the DNA 'replication fork' 4For corals adapting to climate change, it's survival of the fattest -- and most flexible 2For corals adapting to climate change, it's survival of the fattest -- and most flexible 3For corals adapting to climate change, it's survival of the fattest -- and most flexible 4Mode of delivery following a perineal tear and recurrence rate in subsequent pregnancies 2
... of corals are likely to succeed at the expense of ... in the Cell Press journal Current Biology that ... "The good news is that, rather than experiencing wholesale ... the mix of coral species as the ocean warms and ...
... genomes, says a new study of poison frogs from ... changes over time, but the rate at which those ... Juan C. Santos of the National Evolutionary Synthesis Center ... trying to explain why some species have faster-changing genomes ...
... ARLINGTON, Va.The deafening roar of supersonic aircraft can cause ... so the Office of Naval Research (ONR) is funding ... announced April 12. "The noise problem falls into ... noise impact on the communities surrounding air bases," said ...
Cached Biology News:Under climate change, winners and losers on the coral reef 2Athletic frogs have faster-changing genomes 2ONR taps research teams to help reduce jet noise 2
(Date:1/15/2014)... device," Nobel laureate Herbert Kroemer famously observed, referring ... the junctures where layers of different materials meet. ... between layers of metal oxides are becoming increasingly ... spintronics, high-temperature superconductors, ferroelectrics and multiferroics. Realizing the ...
(Date:1/15/2014)... Jan. 15, 2014   Niagara Thermal Products is ... Buffalo BioBlower Technologies LLC ("B3") as the critical thermal ... award from the Army Corps of Engineers.  B3 has ... all biological contaminants and destroys VOCs and other chemical ...
(Date:1/15/2014)... SAN JOSE, California , January 15, 2014 ... for cancer, today announced the appointment of Thomas C Reynolds ... over 20 years, development experience gained in the biotechnology industry, ... "I am delighted to welcome Tom at this transformative ...
(Date:1/15/2014)... A study has been launched to test whether ... could help to tackle the problem of obesity.  This unique ... surgery based in Stowmarket) and academics at University Campus Suffolk ... technology, which is inspired by equipment used to collect data ...
Breaking Biology Technology:A deeper look at interfaces 2Niagara Thermal Products LLC Selected as Critical Supplier for Buffalo BioBlower Air Purification Systems 2Oxford BioTherapeutics Appoints Thomas C Reynolds MD, PhD to its Board of Directors 2Oxford BioTherapeutics Appoints Thomas C Reynolds MD, PhD to its Board of Directors 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 4
... 2011  Amgen (NASDAQ: AMGN ) announced that its ... for the first quarter of 2012. This represents an approximate 29 ... The dividend will be paid on March 7, 2012 to ... on Feb. 15, 2012.  About Amgen ...
... Inc. (PDL) (NASDAQ: PDLI ) today announced that ... payment of $0.15 per share to all stockholders owning shares ... (Logo: http://photos.prnewswire.com/prnh/20110822/SF55808LOGO )   ... humanization of monoclonal antibodies and, by doing so, enabled the ...
... tune and enhance thermal conductivity a basic property generally ... engineers a new tool for managing thermal effects in smart ... devices. The finding was made by a group of ... at Vanderbilt University, and published online in the journal ...
Cached Biology Technology:Amgen Announces 2012 First Quarter Dividend 2Amgen Announces 2012 First Quarter Dividend 3New method for enhancing thermal conductivity could cool computer chips, lasers and other devices 2New method for enhancing thermal conductivity could cool computer chips, lasers and other devices 3
... The IHC Select Immunophosphatase Secondary Detection System ... IHC Select Prediluted Primary Antibody reagents, which ... qualitative identification of antigens by light microscopy ... Secondary Detection System may also be used ...
... FLISP Assay with SR-101 Labeled Substrates ... • Accurately measure serine protease activation ... • B-Bridge's FLISP Kits utilize cell-permeable, ... (FLISPs) to measure chymotrypsin-like activity in ...
From the company that first brought you the chromatin immunoprecipitation (ChIP) kit, a new and improved kit, EZ-ChIP, is now available to make your experiments easier, quicker, and most importantly,...
The PDS-1000 He Hepta system includes the PDS-1000 He biolistic system and the Hepta adaptor....
Biology Products: