Navigation Links
'Explosive' evolution in pupfish
Date:4/27/2011

Two groups of small fish, one from a Caribbean island and one from the Yucatan peninsula of Mexico, exhibit some of the fastest rates of evolution known in any organism, according to a new UC Davis study.

About 50 species of pupfish are found from Massachusetts to Venezuela -- and they are all pretty much the same, said lead study author Chris Martin, a UC Davis graduate student working with Peter Wainwright, a professor of evolution and ecology at UC Davis.

"They look the same and they act the same," eating detritus and algae off rocks, Martin said.

Except in two places. In shallow, salty lakes on San Salvador island in the Bahamas, Martin found that one of the three pupfish species present lives by biting the scales off other fish, while another eats small snails and clam shrimp.

No other pupfish is known to eat scales, Martin said.

Among pupfish originally from the Yucatan area, one eats other fish and another feeds on plankton. Sadly, these fish are now extinct in the wild and only found in labs and aquaria.

The pupfish evolved changes to their jaws to match their specialized diet, allowing Martin to construct an evolutionary map for the species.

If the evolution of all pupfish is like a steadily expanding cloud, Martin found that the San Salvador Island and Yucatan pupfish are like bursts of fireworks within it. They show explosive rates of evolution changing up to 130 times faster than other pupfish, he said.

It's not clear why the pupfish in the two locations are evolving so fast. In both places, the lake water is hot and salty but that's true in other places where pupfish live. And mosquito fish, found in the same two lakes, show no signs of rapid change.

Martin is continuing his research by taking lab-bred fish, including hybrids, back to the lakes to see whether they thrive. He hopes to see which fish succeed out of a spectrum of hybrids.

The research is published online in the journal Evolution. Martin is a National Science Foundation graduate research fellow.


'/>"/>

Contact: Andy Fell
ahfell@ucdavis.edu
530-752-4533
University of California - Davis
Source:Eurekalert  

Related biology news :

1. New method for detecting explosives
2. Water acts as catalyst in explosives
3. Explosive growth of life on Earth fueled by early greening of planet
4. New NIST trace explosives standard slated for homeland security duty
5. Developing enzymes to clean up pollution by explosives
6. Genomic research will enable greener cleanup of military explosive test sites
7. International Drug & Explosives Detection Company IDenta Corp Reports on BTK- Bullet Hole Testing Kit
8. Sniffing out shoe bombs: A new and simple sensor for explosive chemicals
9. Sensors to detect explosives, monitor food being developed at UH
10. NIST, ASTM land a one-two punch to fight explosives terrorism
11. Worm genome offers clues to evolution of parasitism
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
'Explosive' evolution in pupfish
(Date:3/23/2016)... , March 23, 2016 ... erhöhter Sicherheit Gesichts- und Stimmerkennung mit Passwörtern ... (NASDAQ: MESG ), ein führender ... das Unternehmen mit SpeechPro zusammenarbeitet, um erstmals ... Finanzdienstleistungsbranche, wird die Möglichkeit angeboten, im Rahmen ...
(Date:3/22/2016)... Ontario , PROVO and ... Newborn Screening Ontario (NSO), which operates the ... for molecular testing, and Tute Genomics and UNIConnect, ... management technology respectively, today announced the launch of a ... next-generation sequencing (NGS) testing panel. NSO ...
(Date:3/18/2016)... March 18, 2016 --> ... Biometrics, ICT, Manned & Unmanned Vehicles, Physical infrastructure and Perimeter ... companies in the border security market and the continuing migration ... Europe has led visiongain to publish ... success. --> defence & security companies in ...
Breaking Biology News(10 mins):
(Date:5/25/2016)... ... May 25, 2016 , ... WEDI, the nation’s leading authority on the ... Charles W. Stellar has been named by the WEDI Board of Directors as WEDI’s ... an executive leader with more than 35 years of experience in healthcare, association management ...
(Date:5/24/2016)... ... May 24, 2016 , ... Last week, Callan Capital, ... executives and entrepreneurs, held The Future of San Diego Life Science event at the ... life science community attended the event with speakers Dr. Rich Heyman, former CEO of ...
(Date:5/23/2016)... 23, 2016 Oxitec CEO Hadyn ... at 10:15 a.m. ET before the United States House Committee ... mosquitos can play in controlling the spread of the ... virus.      (Logo: http://photos.prnewswire.com/prnh/20150630/227348 ) ... a self-limiting gene. Trials in Brazil , ...
(Date:5/20/2016)... ... 2016 , ... The leading Regenerative Veterinary Medicine Company, VetStem Biopharma ., ... over 100 of their own patients with the VetStem Cell Therapy. Each of these ... for their patients. , The veterinarians are Dr Ross Rich former owner of ...
Breaking Biology Technology: