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:1/20/2016)... Jan. 20, 2016   MedNet Solutions , an ... spectrum of clinical research, is pleased to announce the ... achievements are the result of the company,s laser focus ... eClinical , it,s comprehensive, easy-to-use and highly affordable ... --> Key MedNet growth achievements in 2015 include: ...
(Date:1/13/2016)... 2016 --> ... market report titled - Biometric Sensors Market - Global Industry ... 2023. According to the report, the global biometric sensors market was valued ... reach US$1,625.8 mn by 2023, expanding at a CAGR ... volume, the biometric sensors market is expected to reach ...
(Date:1/8/2016)... and MANCHESTER, United Kingdom , Jan. 8, ... of innovative sensor-based diagnostic products, today announced the closing of ... and existing investors.  Proceeds from the financing will be used ... a hand-held device for detecting early-stage pressure ulcers. ... after receiving CE Mark approval. The device,s introduction ...
Breaking Biology News(10 mins):
(Date:2/9/2016)... Prussia, PA (PRWEB) , ... February 09, 2016 , ... ... Development, Europe. Based in Paris, he will focus on acquiring new accounts and ... being met. , “Fred brings to our European clients more than ...
(Date:2/9/2016)... CA (PRWEB) , ... February 09, 2016 , ... ... strategic changes over the years and Open Access publishing is one of the ... With its 700+ open access journals and 3000+ International Conferences ...
(Date:2/9/2016)... Feb. 9, 2016  DNAtrix, a clinical ... cancer, announced that its lead product, DNX-2401, ... as an orphan medicinal product for the ... of glioma, strikes approximately 25,000 people a ... http://photos.prnewswire.com/prnh/20160208/330986LOGO --> ...
(Date:2/9/2016)... and LONDON , February 9, 2016 /PRNewswire/ ... tech replace paper and protect IP   ... laboratory notebook (ELN) will be rolled out in ... and development (R&D) and protect valuable IP. Users will be ... a specific researcher or experiment as part of the application, ...
Breaking Biology Technology: