HOME >> BIOLOGY >> NEWS
An (ecological) origin of species for tropical reef fish

etically different North and South of this barrier. Since all of these species have similar abilities to disperse, I expected to find genetic differences that corresponded to the barrier in all of them, but, surprisingly, that wasn't the case."

Mitochondrial DNA of adult fish and larvae from three locations in the Caribbean and from three locations in Brazil showed much clearer genetic differences within, rather than across, the two sides of the Amazon barrier. Genetically similar fish were found in ecologically similar habitats--even thousands of miles apart.

Wrasses collected only 360 km apart along the Brazilian coast were genetically more distinct than were fish collected 4200 km apart, from Fernando de Noronha island off of the Brazilian coast and St. Croix in the Caribbean.

The fact that evolutionary partitions correspond more closely to habitat type, rather than to conventional geographical barriers, indicates that local speciation events may overcome the homogenizing effect of migration in the ocean, vindicating Darwin's original ideas about the importance of ecological speciation in biodiversity evolution.


'"/>

Contact: Beth King
kingb@si.edu
202-786-2094 x8216
Smithsonian Tropical Research Institute
6-Apr-2005


Page: 1 2

Related biology news :

1. Discredited Korean embryonic stem cells true origins revealed
2. New research proves single origin of humans in Africa
3. The origin of perennial water-ice at the South Pole of Mars
4. Surprising origin of cells internal highways
5. Nobel scientists Craig Mello and John Mather to speak on origins of life and universe
6. Inflammation is at the origin and progression of diseases such as diabetes or cancer
7. Smithsonian scientists connect climate change, origins of agriculture in Mexico
8. Pediatric cancer stem cell identified: understanding the origin of ERMS
9. Spud origin controversy solved
10. The origin of the brain lies in a worm
11. Could USA presidential DNA trail reveal Middle-Eastern origins?

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/6/2017)... 2017  Privately-held CalciMedica, Inc., announced that it ... of a novel calcium release-activated calcium (CRAC) channel ... Acute pancreatitis, sudden painful inflammation of ... can be very serious.  In severe cases it can ... hospital stays, time in the ICU and substantial ...
(Date:1/4/2017)... 2017  CES 2017 – Valencell , the ... announced the launch of two new versions of ... biometric sensor modules that incorporate the best of ... expertise. The two new designs include Benchmark BE2.0, ... and Benchmark BW2.0, a 2-LED version of its ...
(Date:12/20/2016)... , Dec. 20, 2016 The ... sharing, rental and leasing is stoking significant interest ... radio frequency technology, Bluetooth low energy (BLE), biometrics ... as the next wave of wireless technologies in ... access system to advanced access systems opens the ...
Breaking Biology News(10 mins):
(Date:1/17/2017)... ... 17, 2017 , ... Pono Ola , a mind-body wellness firm on ... the official launch of its much-anticipated Pono Board: a re-invented fitness and anti-fatigue balance ... for over a year, the patented Pono Board is the world’s only exercise balance ...
(Date:1/17/2017)... ... January 17, 2017 , ... Diagenode, a leading ... a collaboration with the Heidelberg University Hospital and the German Cancer Research Center ... the company’s successful launch of its CATS (Capture and Amplification by Tailing ...
(Date:1/16/2017)... ... January 16, 2017 , ... Appellate Court of ... on the appeal filed by India-based Dishman Pharmaceutical & Chemical Ltd. company (DPCL) ... and one of its Dishman Group’s 100% wholly owned New Jersey-based subsidiary Dishman ...
(Date:1/16/2017)... , Jan. 16, 2017  Eurofins Genomics today ... will allow more customers to receive their primers in ... or compromise in quality found with other providers. Express ... United States at no additional fee. ... routine genetic studies, including DNA sequencing, genotyping, site-directed mutagenesis, ...
Breaking Biology Technology:
Cached News: