Navigation Links
Seal rookeries could provide a reliable food source for endangered California condors, study finds

nd Canyon in Arizona.

Newly released condors are fed stillborn calves donated by local cattle ranchers. Eventually, the birds supplement their diet with carcasses of deer, boar and other terrestrial wildlife they happen to find. Unfortunately, many of these animals are killed by hunters using lead shot, which is highly toxic to scavengers. "Condors are obligate scavengers, so they'll feed on anything that's there," Chamberlain says. "If they consume just a small lead fragment, it can kill them."

For the PNAS study, the researchers focused on the dietary habits of condors, past and present, to determine if their food sources had changed over the centuries.

"We wanted to find out what they fed on in historical times and what they feed on now," Chamberlain says, noting that an animal's diet can be determined by measuring the ratio of carbon and nitrogen isotopes that accumulate in its body. For example, seals and sea lions are more enriched in heavy nitrogen-15 and carbon-13 than terrestrial wildlife, such as deer.

Feathers and bones

In 2002, Chamberlain and his colleagues embarked on a worldwide quest for feather and bone samples that would reveal the body chemistry of condors through the ages. "This work was fun," Chamberlain recalls. "First we got modern feathers from the Ventana Wildlife Society in Big Sur, Calif., and other groups involved in the federal Condor Recovery Program. Then I started writing letters to all the museums that had condors, and they were incredibly cooperative."

Among those providing samples were the Smithsonian Institution, the American Museum of Natural History, the California Academy of Sciences, the Natural History Museum of London and the Museums of Paleontology and Vertebrate Zoology at Berkeley.

Using a special laboratory in Stanford's School of Earth Sciences, the research team conducted an isotopic analysis of bones and feathers from 92 individual condors--22 modern
'"/>

Source:Stanford University


Page: 1 2 3 4 5

Related biology news :

1. Protein discovery could unlock the secret to better TB treatment
2. Tiny particles could solve billion-dollar problem
3. First atlas of key brain genes could speed research on cancer, neurological diseases
4. Discovery of key proteins shape could lead to improved bacterial pneumonia vaccine
5. A comprehensive response to HIV could prevent 10 million AIDS deaths in Africa by 2020
6. How the environment could be damaging mens reproductive health
7. Dead zone area in Gulf could be increasing, researchers say
8. Growth in biomass could put US on road to energy independence
9. Nano-bumps could help repair clogged blood vessels
10. Researchers develop assay that could be applied to drug screening
11. Currents could disrupt ocean food chain
Post Your Comments:
(Date:9/19/2014)... a newly discovered hadrosaur with a truly ... Rhinorex condrupus by paleontologists from North Carolina ... what is now Utah approximately 75 million years ... which translates roughly into "King Nose," was a ... hadrosaurs like Parasaurolophus and Edmontosaurus. Hadrosaurs are usually ...
(Date:9/19/2014)... Oklahoma biology professor will study the unique bioelectric signaling ... eventually benefit people,s health. The OU researcher is ... required to produce the signals used to map the ... at a rate of 500-600 discharges a second throughout ... electric fish are extreme, but necessary for survival. , ...
(Date:9/19/2014)... did not evolve for the sake of fairness per ... continued cooperation, so say Frans de Waal, PhD, and ... inequity aversion (IA), which is defined as a negative ... Science . , Their conclusion comes after ... address their hypothesis that it is the evolution of ...
Breaking Biology News(10 mins):New hadrosaur noses into spotlight 2Evolution of responses to (un)fairness 2Evolution of responses to (un)fairness 3
... evidence that a direct interaction between vitamin D and ... multiple sclerosis (MS). The research, published on 6 February ... that vitamin D deficiency during pregnancy and the early ... MS later in life. MS is the most ...
... (NYSE: CSC ) announced today that it ... and Support Services Unrestricted contract by the Department of ... (IDIQ) contract covers a broad range of services, solutions ... BTF business and program units. The contract has a ...
... Feb. 3 SectorWatch.biz announces the availability of a commentary ... Controls, Inc. (OTC Bulletin Board: FOUR), Magal Security Systems Ltd. ... NSSC ), Pointer Telocation (Nasdaq: PNTR ... Systems Inc. (NYSE: CKP ).To view the FiSpace.net ...
Cached Biology News:Genetic study shows direct link between vitamin D and MS susceptibility 'gene' 2Genetic study shows direct link between vitamin D and MS susceptibility 'gene' 3CSC Awarded Department of Defense Biometrics Contract 2SectorWatch.biz Issues Commentary for Investors of Homeland Defense Companies FOUR, MAGS, NSSC, PNTR, BCO, and CKP 2
(Date:9/23/2014)... Cambridge Semantics, the leading provider of ... named in the recent ‘Hype Cycle for Life Sciences ... report details key insights pertaining to the benefits in ... analysts Michael Shanler and Stephen Davies, “The use of ... relationships with scientific stakeholders, and support collaboration and innovation ...
(Date:9/23/2014)... 23, 2014 Marktech Optoelectronics has introduced ... violet emitters in the 280 nm wavelength range. This ... which range from 280nm to 405nm. These new devices ... as well as curing. Mark Campito, Marktech’s CEO states ... interest to manufacturers is that we offer it in ...
(Date:9/23/2014)... 23, 2014 New spin-out ... Innovations, Cambridge Innovation Capital and Johnson & Johnson ... genomics company focused on harnessing the potential of ... testing and treatment, today announced it has raised ... Innovations and including Cambridge Innovation Capital and Johnson ...
(Date:9/22/2014)... 2014 Research and Markets ... the "Global Biotechnology Reagents Market 2014-2018" ... http://photos.prnewswire.com/prnh/20130307/600769) Biotechnology reagents are chemical compounds ... to detect and examine another substance to provide ... laboratories to prepare, collect, and examine specimens from ...
Breaking Biology Technology:Cambridge Semantics Identified in Gartner’s ‘Hype Cycle for Life Sciences 2014’ Report 2Marktech Introduces its New Line of Deep UV Emitters 2Inivata Raises £4m to Realise the Potential of ctDNA Analysis to Improve Cancer Treatment Through Simple Blood Tests 2Inivata Raises £4m to Realise the Potential of ctDNA Analysis to Improve Cancer Treatment Through Simple Blood Tests 3Inivata Raises £4m to Realise the Potential of ctDNA Analysis to Improve Cancer Treatment Through Simple Blood Tests 4Global Biotechnology Reagents Market 2014-2018: Key Vendors are Agilent, BD Biosciences, Bio-Rad, F. Hoffmann-La Roche, Sigma-Aldrich and Thermo Fisher 2Global Biotechnology Reagents Market 2014-2018: Key Vendors are Agilent, BD Biosciences, Bio-Rad, F. Hoffmann-La Roche, Sigma-Aldrich and Thermo Fisher 3
... Reportlinker.com announces that a new market research report is ... Biology: Emerging Global Markets ... INTRODUCTION ... goal for this study is to determine the specific ...
... necessity often taken for granted. However UNICEF estimates that ... access to safe drinking water. New research published in ... shows that an enteric virus-binding protein (EVBP), isolated from ... viruses often present in contaminated water. One of ...
... provider of comprehensive sample management solutions, including storage, cold ... the bioscience industry, is pleased to announce that Mike ... the Indianapolis Business Journal (IBJ). Reffeitt was recognized as ... $100 million or less in annual revenue. ...
Cached Biology Technology:Synthetic Biology: Emerging Global Markets 2Synthetic Biology: Emerging Global Markets 3Synthetic Biology: Emerging Global Markets 4Synthetic Biology: Emerging Global Markets 5Synthetic Biology: Emerging Global Markets 6Synthetic Biology: Emerging Global Markets 7Synthetic Biology: Emerging Global Markets 8Synthetic Biology: Emerging Global Markets 9Synthetic Biology: Emerging Global Markets 10Synthetic Biology: Emerging Global Markets 11BioStorage Technologies' Mike Reffeitt Named "CFO of the Year" by Indianapolis Business Journal 2
... The Mini-PROTEAN II multiscreen apparatus is used ... 7 cm) gels. The apparatus can screen up ... to cut the blot into strips. The apparatus ... templates that accommodate one or two 8 x ...
Fingerprinting II database sharing tools is an optional module for the Fingerprinting II Basic software package that enables peer-to-peer data exchange over the internet and provides external databas...
... Fingerprinting II ... is an optional ... principal component analysis, ... analysis and MANOVA, ...
Fingerprinting II comparative quantification and polymorphism analysis is an optional module that adds comparative quantification and polymorphism analysis functions to the Fingerprinting II Basic so...
Biology Products: