Navigation Links
Isotope analysis reveals foraging area dichotomy for Atlantic leatherback turtles
Date:3/25/2008

The beaches of French Guiana constitute a major reproduction site for leatherback turtles. This sea turtle, although a protected species, is threatened by human activity: it ingests plastics, get accidentally caught in fishing nets, sees its egg-laying sites destroyed and its adults hunted illegally for their meat and their eggs. Female turtles return to the same beach every two to three years to lay their eggs. What happens in the interval remains a mystery. It is sometimes possible to spot them offshore in the North Atlantic. Some even swim to very high latitudes (Canada) in search of their favorite food (principally jellyfish). Argos beacons have recently revealed that some females were swimming in two principal directions: the north as would be expected, but also towards the African coast east of French Guiana.

The question is whether these locations represent two distinct feeding areas or simply an extra stopover in their migration to the far north.

Several French and Belgian scientists (University of Paris-Sud and the Laboratory for Oceanology of the University of Lige, respectively) have studied the question, in particular the carbon and nitrogen isotope ratios (d13C and d15N) in the blood and eggs of these turtles. Isotope ratios are indeed significant dietary markers and indicate, if conditions are favorable, the diet of the animals in recent days, weeks or months, depending on the tissue analyzed.

These analyses, published in this weeks PLoS ONE, are the culmination of long and painstaking fieldwork carried out by the team from the University of Paris-Sud in Guiana. Researchers worked around the clock spotting the turtles, identifying them thanks to their tags (electronic chips serving to identify the animals), and taking blood and egg samples. Some of the sampled females had laid their eggs on the same beach two years previously, others three.

Analysis of the samples showed that the carbon and nitrogen isotrope r
'/>"/>

Contact: Didier Moreau
dmoreau@ulg.ac.be
Public Library of Science
Source:Eurekalert

Page: 1 2

Related biology news :

1. Ginkgo SRMs: Tools for product analysis/quality
2. DNA analysis shows true dispersal of protozoa
3. Interacting protein theory awaits test from new neutron analysis tools
4. Analysis of breast and colon cancer genes finds many areas of differences between tumors
5. Tumor genome analysis unveils new insights into lung cancer
6. Powerful integration of lipid metabolic profiling with gene expression analysis
7. Human clones: New U.N. analysis lays out worlds choices
8. More comprehensive analysis of Klamath River basin needed to aid decision makers
9. Analysis calls for medical device information to better serve patients and doctors
10. Avian origins: new analysis confirms ancient beginnings
11. DOE JGI releases a new version of its metagenome data management and analysis system
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/22/2014)... Conn. , Dec. 22, 2014  NXT-ID, Inc. (NASDAQ: ... biometric authentication company focused on the growing mobile commerce market, ... Apollo Robbins for the 2015 International CES debut ... Apollo Robbins will be at the NXT-ID booth January ...
(Date:12/19/2014)... Markets ( http://www.researchandmarkets.com/research/8kmfcn/iphone_5s ) has announced the ... Apple/AuthenTec TMDR92 & Sapphire - Technology Report" report ... Following the acquisition of AuthenTec in ... the iPhone 5S. It is currently the only device ...
(Date:12/19/2014)... , Dec. 18, 2014   LaunchKey , the first ... post-password and Internet of Things era, today announced the ... venture round was led by Metamorphic Ventures with participation ... Partners, VegasTechFund, and others.  LaunchKey has raised $4 million ...
Breaking Biology News(10 mins):NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 2NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 3NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 4iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3
... Children,s Hospital of Philadelphia has announced the establishment of ... A ceremony on Feb. 15 at the Hospital,s ... the first holder of the chair, pediatric immunologist Jordan ... will allow Dr. Orange to break new ground in ...
... brain are characteristic features of Alzheimer disease. The effect ... plays a central role in learning and memory, is ... of tau protein is largely eliminated when the corresponding ... Planck Research Unit for Structural Molecular Biology at DESY ...
... available in Spanish . Tomatoes spend ... estimated 20 percent are lost to spoilage, according to the ... Research Service (ARS) are working with colleagues at Purdue University ... may lead to tomatoes that taste better and are more ...
Cached Biology News:Modell Chair in Pediatric Immunology established 2Tau-induced memory loss in Alzheimer's mice is reversible 2Tau-induced memory loss in Alzheimer's mice is reversible 3Finding a way to extend tomato shelf-life 2
(Date:1/22/2015)... Crystal Diagnostics (CDx) Xpress System, a rapid ... AOAC-PTM Certifications for the six non-O157 Shiga toxin-producing E. coli ... to as STEC or the “Big-6”) as well as Escherichia ... per 325 g of raw ground beef and raw beef ...
(Date:1/22/2015)... WI (PRWEB) January 22, 2015 Dr. Greg ... the 12th annual Scripps Natural Supplements Pre-Conference seminar on probiotics ... Conference is an annual continuing education conference for health care ... and included the topic of probiotics in health. Dr. Leyer ...
(Date:1/22/2015)... 2015 Diagenode, Inc., a leading ... Bioruptor® and complete solutions for epigenetics research, recently ... alleviating the need for manual processing. The new ... ChIP of histones or transcription factors and a ...
(Date:1/22/2015)... , Jan. 22. 2015  Varian Medical Systems (NYSE: ... has been honored for its commitment to sustainability with inclusion ... Varian is the highest ranked healthcare equipment company among the ... during the World Economic Forum at Davos, Switzerland ...
Breaking Biology Technology:Crystal Diagnostics Awarded AOAC-PTM Accreditation for the Rapid Detection of “Big 6” E.coli Food Pathogens 2Diagenode Launches Unique Semi-Automated Solution for Chromatin Immunoprecipitation 2Varian Honored Among World's 100 Most Sustainable Corporations 2
... LMNX ) today announced that management will ... Growth Conference to be held,September 20, 2007, in ... Balthrop, president and chief,executive officer, and Harriss T. ... Eastern time on Thursday, September 20, 2007. The,presentation ...
... ... Pathogens, PHILADELPHIA, Sept. ... agreement with the Defense,Threat Reduction Agency (DTRA) of the U.S. Department ... targeting both Gram,negative biothreats and conventional Gram negative hospital pathogens. The,agreement ...
... Intra-Cellular Therapies today,announced it has developed a novel ... treatment of female sexual dysfunction (FSD). These,small molecule ... neuronal activity in selected regions of the brain. ... the treatment of hypoactive,sexual desire disorder (HSDD), a ...
Cached Biology Technology:Luminex Corporation to Present at America's Growth Capital Emerging Growth Conference 2GlaxoSmithKline Awarded U.S. Department of Defense Contract to Pursue Novel Antibacterial Research Program 2GlaxoSmithKline Awarded U.S. Department of Defense Contract to Pursue Novel Antibacterial Research Program 3Intra-Cellular Therapies Provides Overview of its Proprietary Portfolio of Compounds for the Treatment of Female Sexual Dysfunction (FSD) 2Intra-Cellular Therapies Provides Overview of its Proprietary Portfolio of Compounds for the Treatment of Female Sexual Dysfunction (FSD) 3
Human Serpin A3 MAb (Clone 213907)...
Recombinant Ovine (Sheep) Growth Hormone, Ultra Pure...
Human SorCS1 Affinity Purified Polyclonal Ab Protein Family: Neurotrophins...
Viral CCI Biotinylated Affinity Purified PAb...
Biology Products: