Navigation Links
A snapshot of pupfish evolution in action
Date:1/10/2013

Chris Martin has bred more than 3,000 hybrid fish in his time as a graduate student in evolution and ecology at UC Davis, a pursuit that has helped him create one of the most comprehensive snapshots of natural selection in the wild and demonstrated a key prediction in evolutionary biology.

"We can see a surprisingly complex snapshot of natural selection driving the evolution of new specialized species," said Martin, who with Professor Peter Wainwright published a paper on the topic in the Jan. 11, 2013, issue of the journal Science.

The "adaptive landscape" is very important for evolutionary biology, but rarely measured, Martin said. He's been fascinated with the concept since high school.

An adaptive landscape takes variable traits in an animal or plant, such as jaw size and shape, spreads them over a surface, and reveals peaks of success (what evolutionary scientists call fitness) where those traits become most effective, or adaptive.

It is a common and powerful idea that influences thinking about evolution. But while the concept is straightforward, it is much harder to map out such a landscape in the wild.

For example, about 50 species of pupfish are found across the Americas. The tiny fish, about an inch or so long, mostly eat algae on rocks and other detritus. Martin has been studying species found only in a few lakes on the island of San Salvador in the Bahamas, where some of the fish have evolved different-shaped jaws that allow them to feed on hard-shelled prey like snails or, in one case, to snatch scales off other fish.

In a paper published in 2011, Martin showed that these San Salvadoran fish are evolving at an explosively faster rate than other pupfish.

Martin brought some of the fish back to the lab at UC Davis and bred hybrids with fish with different types of jaws. He created about 3,000 hybrids in all, which were measured, photographed and tagged. Martin then took about 2,000
'/>"/>

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

Page: 1 2

Related biology news :

1. Leading evolutionary scientist to discuss how genome of bacteria has evolved
2. An evolutionary surprise
3. Ancient Egyptian cotton unveils secrets of domesticated crop evolution
4. Did climate change shape human evolution?
5. A University of Tennessee professors hypothesis may be game changer for evolutionary theory
6. Analysis of stickleback genome sequence catches evolution in action
7. Study shows unified process of evolution in bacteria and sexual eukaryotes
8. Rapid method of assembling new gene-editing tool could revolutionize genetic research
9. Whats in a surname? New study explores what the evolution of names reveals about China
10. Scientists trace evolutionary history of what mammals eat
11. Not by DNA alone: How the epigenetics revolution is fostering new medicines
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A snapshot of pupfish evolution in action
(Date:9/30/2014)... (LMU) in Munich report that a new class ... to chemotherapeutic drugs. They have also pinpointed the ... for anti-tumor agents. , Researchers led by ... of the Technische Universitt Mnchen have identified a ... weapon in the fight against malignant tumors. The ...
(Date:9/30/2014)... a suite of perilous threats in today,s ocean. ... climate change, fragile coral ecosystems are disappearing at ... some species of corals surrounding the island of ... in their tropical environment: coral guard-crabs. New research ... Marine Station scientist Seabird McKeon and the museum,s ...
(Date:9/29/2014)... DC September 29, 2014 -- Plants have ... bacteria help the pants extract nutrients and defend ... pathogens from contaminating fruits and vegetables. Now, scientist ... bacteria inside of seeds; thus ensuring that sprouting ... from the University of Notre Dame, presented their ...
Breaking Biology News(10 mins):Cancer therapy: Driving cancer cells to suicide 2Smithsonian scientists discover coral's best defender against an army of sea stars 2Plants prepackage beneficial microbes in their seeds 2
... of their woody material, could be the key to a ... who add that the approach could also help turn agricultural ... component of woody plant material, is woven in with cellulose ... of wind and microbial attack. However, this protective barrier or ...
... NEW YORK, Dec. 22, 2008 NYU Langone Medical Center ... La Jolla, Calif., have discovered an unexpected cause for the ... of the central nervous system, according to a study published ... new way of thinking about how the human immune system ...
... for humans, Plasmodium falciparum , has been linked ... fairly isolated on the malarial family treeuntil now. A ... Genomics at the American Museum of Natural History reveals ... close evolutionary relationship with P. falciparum and ...
Cached Biology News:Modified plants may yield more biofuel 2Peering inside the skull of a mouse to solve meningitis mystery 2Peering inside the skull of a mouse to solve meningitis mystery 3African thicket rat malaria linked to virulent human form 2
(Date:9/30/2014)... MAR, Calif. , Sept. 30, 2014 ... for women,s health announces its receipt of a patent ... FemmyCycle menstrual cup has also received FDA clearance in ... Canada, and the CE in Europe. This patent is related ... conjunction with this issuance, the company is releasing FemmyCycle ...
(Date:9/30/2014)... September 30, 2014 SoundConnect, ... collaboration company is dedicated to supporting business communication ... Julie Power, a carrier services ... collaboration solutions stays connected and productive at all ... increased movement of businesses to cloud communications services. ...
(Date:9/30/2014)... (PRWEB) September 30, 2014 Back in the ... 500 square feet. per employee, which included space for circulation ... then.” says Jeff Howell, partner at Nidea Corporate Real ... in Toronto. “By the year 2000, however, 250 square ... seeing that number come down to 175 to 225 square ...
(Date:9/29/2014)... , Sept. 29, 2014  Ten of ... fields of cartilage repair, regeneration, allograft reconstruction and ... around the world gathered to discuss the future ... Institute of Regenerative Medicine symposium, Cartilage Regeneration: ... Topics included Orthopedic Biosurgery, Minced Juvenile Allograft, and ...
Breaking Biology Technology:The FemmyCycle 2SoundConnect Expands Carrier Services Division 2ITRA Global Reports on How Companies Are Squeezing More Employees into Less Office Space 2ITRA Global Reports on How Companies Are Squeezing More Employees into Less Office Space 3World Renowned Experts Discuss Future Of Cartilage Regeneration 2World Renowned Experts Discuss Future Of Cartilage Regeneration 3
... LOUIS, Aug. 27 Missouri Coalition for,Lifesaving Cures ... far-,reaching initiative petition filed last week by opponents ... worded and scientifically unsound that it,would exclude Missourians ... syndromes from its definition of "human." In ...
... Drug Royalty LP 2 (DRC) announced,today the ... worldwide,royalty interest in PEG-INTRON for $92.5M. DRC will ... certain royalty recognition levels be met.,PEG-INTRON (peginterferon alpha-2b), ... is marketed worldwide by Schering-Plough Corporation (SGP). ...
... 27 NovaQuest has,made a strategic investment ... specializing in respiratory,disorders. The investment was part ... million) in the Montreal-based company. Last ... partnering group,of Quintiles Transnational, helps TOPIGEN accelerate ...
Cached Biology Technology:New Initiative Has Shocking Effect: Thousands of Missourians with Abnormal Chromosome Structures Are Not Human 2Drug Royalty Corporation (DRC) Announces Acquisition Regarding PEG-INTRON(R) From Enzon Pharmaceuticals, Inc. (ENZN) 2NovaQuest Advances 'Virtual Development' Model With Strategic Investment in TOPIGEN Pharmaceuticals 2
...
... reagent; Ideal for clarifying many items ... nucleic acids, & proteoglycans; Contains no ... downstream processing; Utilizes a reagent that ... as a suspension in saline; Simple ...
A simple, sensitive and reliable method for determining free sulfhydryl content in peptides, protein...
... Tecans open platform for clinical diagnostic applications, ... performance in the clinical diagnostic and blood ... barcode reading and sample traceability as standard ... complies with the IVD-Directive* established in the ...
Biology Products: