Navigation Links
Extreme environment changes fish appearance

The world of the Devils Hole pupfish is a small place. The entire species lives in one rocky pool, 20 meters long and three meters wide, in a cave entrance in Death Valley, Calif. But their environment is not only cramped: it also has a profound effect on the fishes' appearance, raising questions about how rare species can be protected from extinction.

In 1976, the inch-long fish was at the center of a legal battle that reached the U.S. Supreme Court. Conservationists had established the fish in refuges elsewhere in case Devil's Hole became too dry. But the refuge-bred fish began to look different, with deeper bodies and smaller heads, although all the fish are pretty much the same genetically.

Sean Lema, a graduate student at UC Davis, and Gabrielle Nevitt, professor of neurobiology, physiology and behavior, set out to see if environmental changes could affect how the fish looked.

They reared a related but unthreatened species, the Amargosa pupfish, in the lab on a restricted diet and with slight changes in water temperature. The Amargosa pupfish began to look more like the wild Devils Hole pupfish.

"Restricting food availability and raising the temperature just a few degrees shifts morphology dramatically," Lema said.

The findings have implications for conserving species, Lema said.

On one hand, the fish may be more adaptable to changing conditions than thought. But refuge-bred fish might well die if reintroduced directly to Devil's Hole in an attempt to rebuild the population. And if an animal's form is so intimately connected to its environment, is it still the same fish if it is not preserved in the same habitat?

"What is it that we try to preserve -- just genetics, or the habitat that makes them unique?" Lema said.
'"/>

Source:University of California - Davis


Page: 1

Related biology news :

1. Going To Extremes To Improve Human Health
2. Scientists collaborate to assess health of global environment
3. How the environment could be damaging mens reproductive health
4. Study reveals new technique for fingerprinting environmental samples
5. Compounds in plastic packaging act as environmental estrogens altering breast genes
6. UN environmental agency steps up battle against marine pollution
7. Grass makes environmentally friendly biofuel
8. Two studies document rise of superbugs in the environment
9. MRSA study demonstrates need for frequent hand washing and environmental disinfection in health care settings
10. A radical solution for environmental pollution
11. Lactose intolerance linked to ancestral environment
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/22/2016)... Jan. 22, 2016 ... of the "Global Biometrics Market in ... offering. --> http://www.researchandmarkets.com/research/p74whf/global_biometrics ) ... "Global Biometrics Market in Retail Sector 2016-2020" ... --> Research and Markets ( http://www.researchandmarkets.com/research/p74whf/global_biometrics ...
(Date:1/20/2016)... LONDON , Jan. 20, 2016 A ... positioned to directly benefit from the explosion in genomics ... from Howe Sound Research. A range of dynamic trends ... ...... - personalized medicine - pharmacogenomics - pathogen ... economies with large markets - greater understanding of the ...
(Date:1/20/2016)... JOSE, Calif. , Jan. 20, 2016 /PRNewswire/ ... developer of human interface solutions, today announced sampling ... controller solution for wearables and small screen applications ... such as printers. Supporting round and rectangular shapes, ... S1423 offers excellent performance with moisture on screen, ...
Breaking Biology News(10 mins):
(Date:2/9/2016)... ... February 09, 2016 , ... Clinovo ... free and validated Electronic Data Capture (EDC) system ClinCaptureand its new Contract Research ... West Coast 2016 Conference in San Mateo, California on February 10th and 11th. ...
(Date:2/9/2016)... ... February 09, 2016 , ... PharmApprove ... Policy for the National Organization for Rare Disorders (NORD). Dorman will lead PharmApprove ... voices are heard throughout the drug regulatory review process. , “Adding Diane Dorman ...
(Date:2/9/2016)... , February 9, 2016 Three-Year ... Enables Children to Take Part in Life-Changing Camp ... new initiative designed to positively affect the lives of children born ... care. --> SHPG ) is announcing a new initiative ... diseases, as well as the future of rare disease care. ...
(Date:2/8/2016)... 2016 Should antibiotic bone cement products be ... prevent infection after standard total hip or knee replacement ... Institute have been fielding a lot lately. ... Line?" --> "Antibiotic Bone Cement: ... --> While there isn,t a simple answer, ...
Breaking Biology Technology: