31 Aug 2012:
Method Uses DNA Technology
To Track Marine Life From Water Samples
Danish scientists say they have developed a process to detect the presence of fish and whales in local waters through the DNA analysis of water samples
, an innovation that will help researchers more safely
Thomsen, et al/PLoS ONE
monitor biodiversity in the world’s oceans. Using sophisticated DNA sequencing technology, researchers from the University of Copenhagen say they were able to detect DNA from 15 different fish species from a half-liter sample of seawater. According to Philip Francis Thomsen, one of the authors of the study published in the journal PLoS ONE
, tests of the water revealed the presence of small and large fish — including common species and species rarely or never recorded by conventional monitoring — in the waters off Denmark. “Cod, herring, eel, plaice, pilchard and many more have all left a DNA trace in the seawater,” he said. The researchers say the use of DNA technology may offer a less invasive way of monitoring marine populations than traditional methods, such as the use of trawls and pots. In addition, such DNA tests could be conducted almost anywhere and on any species, unlike typical monitoring methods that focus mostly on commercial fish species.
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.
is now available for mobile devices at e360.yale.edu/mobile
An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
Ugandan scientists monitor the impact of climate change on one of Africa’s most diverse forests and its extraordinary wildlife. Learn more.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
video goes onto the front lines with Colorado firefighters confronting deadly blazes fueled by a hotter, drier climate. Watch the video.
A three-part series Tainted Harvest
looks at the soil pollution crisis in China, the threat it poses to the food supply, and the complexity of any cleanup. Read the series.