Navigation Links
DNA better than eyes when counting endangered species
Date:3/7/2011

WEST LAFAYETTE, Ind. - Using genetic methods to count endangered eagles, a group of scientists showed that traditional counting methods can lead to significantly incorrect totals that they believe could adversely affect conservation efforts.

Andrew DeWoody, a professor of genetics at Purdue University; Jamie Ivy, population manager at the San Diego Zoo; and Todd Katzner, a research assistant professor at the University of West Virginia, found that visual counts of imperial and white-tailed sea eagles in the Narzum National Nature Reserve of Kazakhstan significantly underestimated the imperial eagle population there. Using DNA from eagle feathers gathered in the area, the researchers were able to identify individual DNA fingerprints for each bird.

The technique showed that there were 414 eagles, more than three times as many as had been visually observed, and more than two and a half times more than modeling suggested would be there.

"A biologist doesn't always see them coming and going," said DeWoody, whose findings were published in the early online version of the journal Animal Conservation. "Eagles are difficult to capture, mark and resight. Biologists in the field can't differentiate individuals, whereas by a genetic fingerprint geneticists can differentiate among individuals that have visited a site."

DeWoody, Ivy and Katzner, with collaborator Evgeny Bragin of the Narzum Natural Nature Reserve collected thousands of eagle feathers around roosts and nesting sites. DeWoody's team at Purdue was able to extract DNA from those feathers and determine that there were hundreds of eagles that had recently visited the site.

"Generally we say 'what you see is what you get,' but in this case it's the complete opposite," said Katzner, who used the data to model more accurate estimates of eagle populations. "When your field data are off by that much, it's difficult to build accurate models because your starting poi
'/>"/>

Contact: Brian Wallheimer
bwallhei@purdue.edu
765-496-2050
Purdue University
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Army can boost mission success by better managing
2. Efavirenz-based initial therapies associated with better outcomes in HIV-infected adults
3. Caltech scientists engineer supersensitive receptor, gain better understanding of dopamine system
4. Better beer: College team creating anticancer brew
5. Building a better bee
6. Men are better at detecting infidelities
7. Sniffing out a better chemical sensor
8. Sibling study could lead to better treatments for inherited form of colon cancer
9. Soybean grant gives researchers tools to unravel better bean
10. EPA and USDA should create new initiative to better monitor nutrients
11. In the animal world, bigger isnt necessarily better
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
DNA better than eyes when counting endangered species
(Date:10/31/2014)... Geologists are letting the air out of a nagging mystery ... have long speculated as to why animal species didn,t flourish ... to prosper at the end of the Proterozoic period, about ... stretch before that, when most researchers think there also was ... so great then, after all. , In a study published ...
(Date:10/31/2014)... uncovered key steps involved in programmed cell death, offering ... cancers and neurodegenerative diseases. , The research teams ... to discover the three-dimensional structure of a key cell ... in how it causes cell death. Their studies were ... Proceedings of the National Academy of Sciences ...
(Date:10/30/2014)... soil subsidence and reduce greenhouse gas emissions, according ... by Dartmouth College researchers and their colleagues. , ... to continually measure the fluctuations of both carbon ... in the journal by Global Change ... organic soils has resulted in vast soil subsidence ...
Breaking Biology News(10 mins):Lack of oxygen delayed the rise of animals on Earth 2A matter of life and death: Cell death proteins key to fighting disease 2Dartmouth study finds restoring wetlands can lessen soil sinkage, greenhouse gas emissions 2
... A deadly, rare type of soft-tissue cancer may be completely ... growth, UT Southwestern Medical Center researchers report. In the ... found that inhibiting the action of a protein called BRD4 ... malignant peripheral nerve sheath tumors (MPNSTs). "This study identifies ...
... international group of investigators has discovered new genes, pathways ... to rheumatoid arthritis (RA). The findings are published online ... association study (GWAS) meta-analysis in more than 100,000 people ... sites of genetic variation involved in risk for RA. ...
... of Excellence for Coral Reef Studies has been awarded $A28m ... Centre will be reorganised into three new research programs - ... Responding to a Changing World. , Centre Director, Professor Terry ... provide understanding of coral reefs and their interaction with ...
Cached Biology News:UTSW study identifies potential therapeutic target for incurable, rare type of soft-tissue cancer 2Researchers complete a milestone in defining the genetic basis of rheumatoid arthritis 2
(Date:10/31/2014)... FAIRFIELD, Connecticut (PRWEB) October 31, 2014 ... remains sanitary is an uphill battle in many corners ... for a rural farming community in northwestern Bolivia where ... is where a group from Fairfield University’s School of ... at the Unidad Academica Campesina (UAC), “the united college ...
(Date:10/31/2014)... October 30, 2014 Two separate ... were hosted by Charm Sciences at its Andover, ... week in the US, the participants discussed international ... hygiene management, and process verification, and received hands-on ... This was the first visit to the United ...
(Date:10/31/2014)... (PRWEB) October 31, 2014 This ... Global and China Biocides industry. The report provides ... and industry chain structure as well as industry ... including China’s domestic market as well as Global ... analysis. The report on the Chinese biocides ...
(Date:10/31/2014)... 2014 ENVIRON , an ... today that Dr. Harvey Clewell III has rejoined ... work closely with senior professionals in ENVIRON’s Health ... serve at The Hamner Institutes for Health Sciences ... where he is Director, Center for Human Health ...
Breaking Biology Technology:Fairfield University School of Engineering project reduces illness in rural community 2Fairfield University School of Engineering project reduces illness in rural community 3Charm Sciences Hosts Executives from Latin America for Dairy Safety Executive Seminar 2Biocides Market for International & Chinese Regional Development Analysis Now Available at DeepResearchReports.com 2Biocides Market for International & Chinese Regional Development Analysis Now Available at DeepResearchReports.com 3Internationally recognized health scientist Dr. Harvey Clewell renews association with ENVIRON 2Internationally recognized health scientist Dr. Harvey Clewell renews association with ENVIRON 3
... a world-wide leader in custom genomic and molecular ... position itself as the Next-Generation Sequencing Provider of ... attributed to the company,s ability to respond quickly ... genomics technologies. Building on this success, SeqWright announced ...
... that a new market research report is available in ... 1011 http://www.reportlinker.com/p0358381/Industrial-Biotechnology-China-News-1011.html ... not past." Owing to the monetary easing policy adopted ... affect almost all industries in China, including corn products. ...
... can be used to control the electrical properties ... devices and highly sensitive sensors. This year,s ... into graphene, recognising its potential for many applications ... technology. The UK,s National Physical Laboratory, along with ...
Cached Biology Technology:SeqWright Continues Expansion of Next-Generation Sequencing Capabilities 2Reportlinker Adds Industrial Biotechnology China News 1011 2New research shows how light can control electrical properties of graphene 2
... A full-featured high-performance ICP-MS system designed for ... interface, Omega II off-axis ion lens, true ... 7500a can handle the widest range of ... the 7500a now includes as standard Agilents ...
... Identical to the DH-2000, except that it ... 190-1700 nm wavelength range and comes with a ... up to 5 Hz) The DH-2000 ... spectrum of deuterium and tungsten halogen light sources ...
One controller two vessel system suitable for early stage of fermentation, and small scale, Application : cultivation of microorganisms and human or animal cells...
... handy dispensers save space and organize ... other garb. They are the perfect ... used in labs, processing and manufacturing. ... and the particles they attract. Many ...
Biology Products: