Navigation Links
New light trap captures larval stage of new species; DNA barcode technology used
Date:10/23/2007

VIRGINIA KEY, FLA. (Oct. 22, 2007) When David Jones, a fisheries oceanographer at the Cooperative Institute for Marine and Atmospheric Studies (CIMAS) located at the University of Miamis Rosenstiel School, set out to design a better light trap to collect young reef fishes, he never imagined his invention would contribute to the discovery of a new species. But, after finding a goby that didnt quite fit any known description, his catch turned out to be the answer to another scientists twenty-five-year-old research conundrum. The larval stage captured in Joness new trap was matched to the adult form of a previously unknown species of reef fish by new DNA barcoding technologywhich confirmed both were members of a new species.

Jones and his team deployed his new light traps in the deep tropical waters surrounding Banco Chinchorro, a remote coral reef atoll off Mexicos Costa Maya which was recently designated as a Marine Biosphere Reserve. The traps capture fish larvae in a manner similar to a fishermans minnow trap, but attract them with a programmable lighting system enclosed in a submersible housing. The lights entice marine organisms to enter the trap like a moth to a flame. Joness innovative trap intercepts fish returning to the reef at the end of their journey as larvae through the treacherous waters of the open ocean. This allows researchers access to species normally inaccessible by traditional sampling methods, such as those that occupy deep recesses within the reef as adults.

Working with scientists from El Colegio de la Frontera Sur (ECOSUR) in Mexico, we retrieved the nightly catches of the light traps each morning. The traps performed well, collecting live specimens from a diverse range of reef fish species. Each evening we meticulously sorted and identified our catch, using a microscope to count fin rays, scales, and bones and examine pigmentation patterns that distinguish species. I came across one specimen of goby that wasnt quite right, said Jones.

That individual differed slightly from the known species of Atlantic gobies by having fewer fin rays and lacking a frenum, the small fold of tissue in the pelvic fins of most gobies that forms a sucking disc for grasping the substrate.

The fish was sent to Dr. Benjamin Victor of the Ocean Science Foundation in California, who used a new biochemical technique known as barcoding to match DNA from the larva to an adult fish Victor himself stumbled upon a quarter of a century earlier in Panama. Testing confirmed that the fish was in fact a new species, genetically different from its closest know relatives by about 25%. The specimen in Joness trap turned out to be a Coryphopterus kuna, a new species of goby named after the indigenous people of Panama.

This discovery marks the first vertebrate to have its genetic barcode included in its original species description, which was published by Victor in the July 2007 issue of Zootaxa http://www.mapress.com/zootaxa/2007f/zt01526p061.pdf. The process involves identifying and isolating a section of an organisms mitochondrial DNA to allow researchers a simple and definitive method of recognizing and categorizing existing species by assigning each a unique, searchable DNA barcode.

DNA barcoding allowed me to match the larva to the adult...[and] prove to the other fish biologists that this was a new species, said Victor.


'/>"/>

Contact: Barbra Gonzalez
bgonzalez@rsmas.miami.edu
305-421-4704
University of Miami Rosenstiel School of Marine & Atmospheric Science
Source:Eurekalert

Related biology news :

1. Researchers discover way to make cells in the eye sensitive to light
2. Recent breakthroughs in common adult leukemia highlighted in New England Journal of Medicine
3. Bacteria collection sheds light on urinary tract infections
4. Sea skate experiment sheds light on human cell transport
5. X-Ray Beams And Fruit Fly Flight Simulator Aid Scientists View Of Muscle Power
6. McGill researchers shed light on formation of carcinogen in food
7. Scientists discover how plants disarm the toxic effects of excessive sunlight
8. Light therapy may combat fungal infections, new evidence suggests
9. Medical molecules designed to respond to visible light that can penetrate tissue
10. Genetic defects give the immune system the green light to attack the pancreas
11. Researchers find gene that may be at root of potato blight
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/24/2017)... -- EyeLock LLC, a leader of iris-based identity authentication ... solution on the latest Qualcomm® Snapdragon™ 835 mobile ... Congress 2017 (February 27 – March 2, ... Stand 3E10. The Snapdragon 835 ... combination of hardware, software and biometrics technologies ...
(Date:2/21/2017)... , February 21, 2017 ... 70 Millionen US-Dollar wachsen. Nach einem Gespräch mit mehr als ... einige Hindernisse zu überwinden gilt, um diese Prognose zu ... ... anderem die Mobilisierung der finanziellen Mittel für die Biobank, ...
(Date:2/13/2017)... FRANCISCO , Feb. 13, 2017  RSA ... centralized platform that is designed to enhance fraud ... latest release in the RSA Fraud & Risk ... enable organizations to leverage additional insights from internal ... tools to better protect their customers from targeted ...
Breaking Biology News(10 mins):
(Date:3/24/2017)... , March 24, 2017  Infectex Ltd., a ... today announced positive results of a Phase 2b-3 clinical ... regimen in patients with multidrug-resistant pulmonary tuberculosis (MDR-TB). SQ109 ... at Sequella, Inc. ( USA ) and ... A total of 140 patients were enrolled in a ...
(Date:3/24/2017)... March 24, 2017 Agenus Inc. (NASDAQ: AGEN), ... antibodies and cancer vaccines, today announced participation at the ...  Annual William Blair and Maidstone Life Sciences conference "Cancer ... in New York, NY . Agenus ... 29 at 9:40 am: Robert B. Stein , ...
(Date:3/23/2017)... , March 23, 2017  SeraCare ... to global in vitro diagnostics manufacturers and ... the industry,s first multiplexed Inherited Cancer ... testing by next-generation sequencing (NGS). The Seraseq™ ... developed with input from industry experts to ...
(Date:3/23/2017)... NetworkNewsWire Editorial Coverage  ... Cancer remains one of the world,s ... systems, in terms of costs and resources. However, as the ... of innovative and efficient therapies that demonstrate higher chances of ... cancer treatments, a growing number of patients receiving immuno-oncology therapies ...
Breaking Biology Technology: