Navigation Links
Cosmopolitan eels
Date:4/7/2010

g vertebrate forms, says Reece. Its body wall is only one cell thick and it has no digestive tract to speak of.

"Most reef-fish larvae feed on plankton in the water column," Reece says. "Moray larvae are so simple, they can't digest plankton, so they feed on the shed exoskeleton of plankton and on plankton excrement."

"It's ironic these vicious predators start out too delicate to eat even plankton they have to eat plankton poop and work their way up," he says laughing.

Barriers in the ocean?

In biology textbooks the go-to mechanism for speciation (or the splitting of a population into two groups that no longer interbreed) is geographic isolation. One group gets separated from the other, by for example, the formation of a mountain, and then over time natural selection and genetic drift gradually remodel the two similar groups into two dissimilar ones.

The question is whether there are barriers in the ocean that play the same role in speciation as the mountain ranges do on land.

Two suspects are the Eastern Pacific Barrier and the Sunda Shelf. The Eastern Pacific Barrier is a stretch of open ocean 3000 to 5000 kilometers wide that separates the Hawaiian archipelago and the Central Pacific Islands from the Americas. "That's just too much open ocean for larvae to cross," says Reece.

The Sunda Shelf, on the other hand, is an area of relatively shallow water between the Indian Ocean and the Pacific Ocean that has been repeatedly exposed when sea levels fell during periods of extensive glaciation.

Were the undulated and yellow-edged morays on either side of these barriers distinguishable genetically?

To find out the biologists looked at selected mitochondrial and nuclear genes and asked whether there were unique alleles (variants) of these genes and whether the degree of variance was correlated with geographic separation.

They found lots of variation among the eel genes they examin
'/>"/>

Contact: Diana Lutz
dlutz@wustl.edu
314-935-5272
Washington University in St. Louis
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology news :

1. Cosmopolitan microbes -- hitchhikers on Darwins dust
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Cosmopolitan eels
(Date:9/30/2014)... Institutes of Health (NIH) awarded Lawrence Livermore National ... electrode array system that will enable researchers to ... resolution and scale. , LLNL,s grant-funded project is ... BRAIN (Brain Research through Advancing Innovative Neurotechnologies) ... our understanding of the human mind and uncover ...
(Date:9/30/2014)... of environmental scientists and engineers, led by Clemson ... three-year, $5.25 million grant from the U.S. Department ... to make a direct positive impact on South ... disposal of radioactive contaminants. , "Understanding the scientific ... with environmental aspects of nuclear technologies is imperative ...
(Date:9/30/2014)... New England Journal of Medicine reports positive results ... crizotinib against the subset of lung cancer marked by ... of 50 patients with advanced non-small cell lung cancer ... was 72 percent, with 3 complete responses and 33 ... takes for the disease to resume its growth after ...
Breaking Biology News(10 mins):NIH taps lab to develop sophisticated electrode array system to monitor brain act 2NIH taps lab to develop sophisticated electrode array system to monitor brain act 3Researchers get $5.25 million to advance nuclear technologies in South Carolina 2NEJM: Crizotinib effective in Phase 1 trial against ROS1 lung cancer 2
... Calif. Researchers at Sandia National Laboratories will use ... high-throughput assays as part of a multiproject, $34 ... (ARPA-E) aimed at developing advanced biocatalyst technologies that ... transportation. The ARPA-E program is Reducing Emissions ...
... scientific team has discovered a gene associated with a ... variant may be an actual cause of this form ... children. "Because asthma is a complex disease, with ... recurrent asthma occurring between ages two and six," said ...
... OVERVIEW: Straight from Stockholm: Randy Schekman, Ph.D., ... New Orleans after receiving the 2013 Nobel Prize in ... 2,500 poster presentations about the latest research on cellular ... cell interactions and the proverbial much, much more. ...
Cached Biology News:Converting natural gas to liquid transportation fuels via biological organisms 2Converting natural gas to liquid transportation fuels via biological organisms 3Novel gene variant found in severe childhood asthma 2
(Date:9/30/2014)... 2014 OriginOil Inc. (OTC/QB: OOIL), developer ... to clean up large quantities of water, announced today ... reported on the launch of the company's CLEAN-FRAC™ industrial ... by partner STW Resources . , Immediately upon ... day (bpd) and achieved a 99.8% reduction in Turbidity ...
(Date:9/30/2014)... and ROCKVILLE, Md., Sept. 30, 2014 ... partnership focusing on commercializing market-relevant biohealth innovations and increasing ... , announced today that venture capitalist, Tania ... a strategic advisor. Dr. Fernandez will be a member ... Fund, which will provide up to $50 million in ...
(Date:9/30/2014)... September 30, 2014 iLab Solutions announced ... Benchmarking study which focuses on core facility operations, ... core managers face today. , In its 4th year ... of note is the year-over-year decrease in the percentage ... appear to be feeling the constraints of this trend. ...
(Date:9/30/2014)... The custom stainless steel fabrication company ... 2014. The Boston Area Chapter of ISPE (International Society ... event for Wed., Oct. 1 at Gillette Stadium Clubhouse ... largest in ISPE Boston’s long history, with more than ... expected. , HOLLOWAY AMERICA President David Simpson is ...
Breaking Biology Technology:OriginOil, Inc. Report to Shareholders: Blue Gold in West Texas 2Seasoned Life Sciences Venture Capitalist Tania Fernandez Joins BHI to Help Manage New BioHealth Gap Fund 2iLab Solutions Announces the Results of the 2014 Core Facility Benchmarking Study 2iLab Solutions Announces the Results of the 2014 Core Facility Benchmarking Study 3HOLLOWAY AMERICA to Exhibit at ISPE Boston Product Show 2014 2HOLLOWAY AMERICA to Exhibit at ISPE Boston Product Show 2014 3
... technologys sake. And yet a visiting space alien that is ... for believing thats what most of us are doing. We ... the technology and almost none of our energy into assessing ... From the way we allocate our energy and attention, it ...
... MADISON, Wis. — With the University of Wisconsin System ... of creating two separate statewide networks, Gov. Jim Doyle ... efforts. , ,"It's more sensible for taxpayers to have ... spokesperson Dan Leistikow. , ,Initial discussions last year about ...
... a new product, behave just like parents jumping in ... of the incubation wing is often replaced by a ... Dilbertish style revolution. Objects do fly, even though they ... Everyone shares the excitement and all fights are well ...
Cached Biology Technology:Why are you buying technology? 2Why are you buying technology? 3Governor tells UW to scrap network plans 2Naming that thing... again? 2Naming that thing... again? 3Naming that thing... again? 4
...
TNM-FH Insect Medium 1 liter...
IHC Polymer Detection Kit (Rabbit DAB)150 slides...
Performance, mycoplasma, virus, and endotoxin tested. Collected from calves 14 days old or less...
Biology Products: