us scientists track fish migration using dna
Last Updated : GMT 11:59:16
Egypt Today, egypt today
Egypt Today, egypt today
Last Updated : GMT 11:59:16
Egypt Today, egypt today

In water samples

US scientists track fish migration using DNA

Egypt Today, egypt today

Egypt Today, egypt today US scientists track fish migration using DNA

The Hudson River is seen on May 29, 2015 in New York City
Washington - Arab Today

A simple analysis of fish DNA in water drawn from two New York rivers successfully tracked the presence or absence of numerous species during a spring marine migration, according to research published Wednesday.

The inexpensive technique, which can have broad applications in monitoring and protecting aquatic life, was conducted in the East River, which is actually an inlet, and the Hudson River last year.

"By conducting a series of tests over time, collecting surface water from the same point on both the Hudson and East Rivers once a week for six months, we've successfully demonstrated a novel way to record fish migration," said the researchers at New York's Rockefeller University, whose work appeared in the latest issue of scientific journal PLOS One.

The weekly "snapshots" came from water samples filtered to concentrate the DNA left behind by the slimy surface of fish as they swim, or from their droppings. The DNA was then extracted and sequenced, with the results matched against an online public reference library.

The researchers' data largely corresponded to findings from years of migration studies conducted by fishnet trawls, the traditional method of tracking marine migration. This is much more labor intensive, expensive and harmful to fish.

"Environmental DNA" sampling will be an easy way to estimate the population and distribution of fish and other aquatic species in bodies of water from rivers and lakes to seas and oceans, the authors said.

- 'Clear new insight' -

"It amazes me that we can get the same information from a small cup of water and a large net full of fish," said Mark Stoeckle, lead author and senior research associate for the Program for the Human Environment at Rockefeller University.

"Our work also offers clear new insight into the durability of DNA in the water, which persists despite currents and tides with a 'Goldilocks' quality just right for research," he said, telling AFP that experiments carried out in aquariums showed DNA survives for a few days or even a week.

Stoeckle's study was inspired by French scientist Pierre Tabarlet of the University of Grenoble, who was the first to show that small volumes of water contained enough DNA fragments to detect dozens of species of fish.

The New York research obtained DNA from 42 species of fish, including 81 percent of those known to be common to the area, such as herring, striped bass and oyster toadfish -- a flattened brown creature with bulging eyes and a mouthful of teeth.

Uncommon species were also detected, while some DNA came from fish frequently consumed by New Yorkers but not naturally present in the East and Hudson Rivers, such as salmon, tilapia and red snapper.

The researchers determined these latter samples likely entered the water after passing through humans and being discharged in wastewater.

- Future applications -

The eDNA technique could allow researchers to identify endangered species sold in markets and restaurants, said Jesse Ausubel, another Rockefeller University researcher and study co-author.

Next steps involve refining the technology by comparing more eDNA results against the findings from traditional studies carried out with nets and sonar. 

"It is unclear, for example, if 100 DNA 'reads' indicate the presence of one fish or 10 fish," researchers said. 

Ausubel said that stage will take five to 10 years but "the upside potential is just enormous."

"It could easily improve the rationality with which fish quotas are set and the quality and reliability of their monitoring around the world," he said.

For Tony MacDonald, director of the Urban Coast Institute at Monmouth University, the science of eDNA sampling "represents a potentially important advance in our capability to detect, understand and more effectively and efficiently manage fisheries and marine biodiversity."

source: AFP

egypttoday
egypttoday

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

us scientists track fish migration using dna us scientists track fish migration using dna



Egypt Today, egypt today Modern colorful bedroom renovation

GMT 12:15 2017 Thursday ,21 December

Modern colorful bedroom renovation
Egypt Today, egypt today Paris Fashion Week: John Galliano goes co-ed on the catwalk
Egypt Today, egypt today For the Variety of Interior Design Styles

GMT 22:35 2017 Tuesday ,19 December

For the Variety of Interior Design Styles

GMT 10:02 2017 Friday ,21 April

Naked mole-rats can survive near-suffocation

GMT 13:03 2017 Saturday ,11 November

Mercedes-Benz S-Class remains

GMT 18:55 2018 Monday ,05 November

Merkel's make-up forms part of Paris exhibition

GMT 09:28 2018 Tuesday ,02 January

Kim says North Korea could participate

GMT 11:17 2017 Thursday ,21 December

Sixteen dead in sauna fire in S. Korea: fire service

GMT 14:19 2017 Wednesday ,20 December

Sharm El Sheikh hosts 3rd Arab Conf. on Food,

GMT 00:33 2011 Wednesday ,28 September

The Last Friday

GMT 20:30 2017 Friday ,10 February

Valentino Couture,Spring 2017-2018

GMT 10:34 2017 Sunday ,29 October

Belgium sets up English-language business court

GMT 12:36 2017 Thursday ,09 February

Brisk demand for Pyeongchang Winter Olympics tickets

GMT 07:25 2017 Monday ,04 December

Obstacles remain as New Caledonia prepares

GMT 18:41 2017 Monday ,18 December

Menna Shalaby happy for her campaign success

GMT 08:47 2017 Sunday ,17 December

Faring badly: Uber struggles to make inroads in Japan

GMT 13:35 2017 Monday ,27 February

Style and politics on Oscars red carpet

GMT 08:26 2017 Friday ,04 August

Philippines Has Fastest Growing

GMT 13:16 2017 Wednesday ,29 March

GQ Style editor Luke Day signs to Bryant Artists
 
 Egypt Today Facebook,egypt today facebook  Egypt Today Twitter,egypt today twitter Egypt Today Rss,egypt today rss  Egypt Today Youtube,egypt today youtube  Egypt Today Youtube,egypt today youtube

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

egypttoday egypttoday egypttoday egypttoday
egypttoday egypttoday egypttoday
egypttoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
egypttoday, Egypttoday, Egypttoday