Navigation Links
Scientists can track origin of shark fins using 'zip codes' in their DNA
Date:4/27/2011

the future. Like many large sharks, these species have a wide distribution around the globe but are tied to coastal areas for reproduction.

"By analyzing part of the genome that is inherited solely through the mother, we were able to detect differences between sharks living along different continents in effect, their DNA zip codes," said Dr. Demian Chapman, leader of the research team and assistant director of science of the Institute for Ocean Conservation Science. "This research shows that adult females faithfully give birth along the continental region where they were born. If fished too much, the population will collapse, and it is extremely unlikely that it will be replenished from immigration of sharks from another region."

This is precisely what has happened along the U.S. Eastern Seaboard, where the once common dusky shark is now rare and a species of concern for listing under the Endangered Species Act. At one time, these animals were common in ocean waters off the United States; however, a recent stock assessment of the sharks along the U.S. East Coast and in the Gulf of Mexico showed an 80 percent decline even though they have been protected since 2000. The recovery of the species is extremely slow because the average age of maturity is 20 years, its reproductive cycle only occurs every three years including a two-year pregnancy and its litter size is relatively small (three to 14 offspring).

"Here in the United States, it took only a few decades to nearly wipe out our dusky sharks, and it will probably take a few centuries for their stocks to be replenished," said Martin Benavides, lead author of both studies and research assistant at the Institute for Ocean Conservation Science. "Our results dash any hopes that dusky sharks from other areas of the world will replenish the depleted U.S. stock. The sight of a dusky shark swimming off our shores will be a rare experience for generations to come."

"We know very lit
'/>"/>

Contact: Cindy Yeast
cdyeast@earthlink.net
720-542-9455
Stony Brook University
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Jefferson scientists deliver toxic genes to effectively kill pancreatic cancer cells
2. Scientists identify novel inhibitor of human microRNA
3. Argonne scientists peer into heart of compound that may detect chemical, biological weapons
4. MU scientists go green with gold, distribute environmentally friendly nanoparticles
5. Scientists identify gene that may contribute to improved rice yield
6. Scientists discover why a mothers high-fat diet contributes to obesity in her children
7. MU scientists see how HIV matures into an infection
8. Earth scientists keep an eye on Texas
9. Thinking it through: Scientists call for policy to guide biofuels industry toward sustainability
10. Scientists identify a molecule that coordinates the movement of cells
11. Scientists Find new migratory patterns for Mediterranean and Western Atlantic bluefin tuna
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists can track origin of shark fins using 'zip codes' in their DNA
(Date:8/19/2014)... DIEGO, Calif. (August 19, 2014) Daylight was breaking ... MY Hanse Explorer. Between sips, about a dozen scientists ... and slip below the surface to collect water samples ... would tinker with the whirring gizmos and delicate machinery ... single goal: Be the first research group to bring ...
(Date:8/18/2014)... person,s gut may protect against or increase susceptibility to ... bacterial intestinal inflammation, according research published this week in ... American Society for Microbiology. The study also found that ... one,s gut bacteria composition. , "It has been known ... in the gut, can protect a person from colonization ...
(Date:8/18/2014)... UT Southwestern Medical Center have found a new way that ... known as long non-coding RNA. , The internal body clocks, ... functions, from waking and sleeping to body temperature and hunger. ... influenced by external cues such as light and temperature. , ... many organisms, what they do in the body, and how ...
Breaking Biology News(10 mins):Sequencing at sea 2Sequencing at sea 3What's in your gut? Certain bacteria may influence susceptibility to infection 2Researchers obtain key insights into how the internal body clock is tuned 2Researchers obtain key insights into how the internal body clock is tuned 3
... seeking to detect bioterrorism attacks, doctors diagnosing diseases ... a new ally in a Lawrence Livermore National ... as the Lawrence Livermore Microbial Detection Array (LLMDA), ... to detect within 24 hours any virus or ...
... prestigious Pierre Delmas Prize: An ESCEO-IOF/Servier Achievement Award was ... at the Claude Bernard University of Lyon, France. ... honour of the late Pierre D. Delmas, the world ... (IOF). The grant of 40,000 Euros, courtesy of Servier, ...
... A prescription drug already approved to treat genital warts and ... effectiveness of future vaccines for bacterial and viral diseases, such ... appear in ACS, Molecular Pharmaceutics , a bi-monthly journal. ... Research Center and UC-Berkeley note that vaccines prepared from weakened ...
Cached Biology News:New LLNL detection technology identifies bacteria, viruses, other organisms within 24 hours 2New LLNL detection technology identifies bacteria, viruses, other organisms within 24 hours 3Winner of Pierre Delmas Prize announced at World Congress on Osteoporosis 2010 2
(Date:8/18/2014)... 18, 2014 TNI BioTech, Inc. (OTC-BB: TNIB) ... manufacturing and marketing of innovative therapies for autoimmune diseases ... providing a second notice of TNI BioTech,s annual meeting ... announcement, Noreen Griffin , founder and CEO of ... your participation in the Annual Meeting. On behalf of ...
(Date:8/18/2014)... August 18, 2014 China is ... for the clinical research industry. Clinicaltrial.gov statistics highlight ... to its aging population; a high increase in ... a densely populated pool of patients and a ... these positive points, China also presents challenges for ...
(Date:8/16/2014)... 16, 2014 Firms in the ... guidance and advisory services to businesses, government bodies ... Industry services are highly diverse as operators assist ... range from geological and geophysical consulting services to ... the past five years, the recovery of the ...
(Date:8/16/2014)... make atomic-force microscope probes 20 times more sensitive and ... of an individual virus. , The technique, developed by ... using laser beams to cool a nanowire probe to ... achieved after cooling is accurate enough for us to ... 100 billion times lighter than a mosquito," said Dr ...
Breaking Biology Technology:TNI BioTech Inc., provides 2nd Notice of Annual Meeting September 4, 2014 2TNI BioTech Inc., provides 2nd Notice of Annual Meeting September 4, 2014 3TNI BioTech Inc., provides 2nd Notice of Annual Meeting September 4, 2014 4China – Land of Opportunities & Challenges for the Clinical Research Industry, New Webinar Hosted by Xtalks 2Scientific and Economic Consulting in Canada Industry Market Research Report Now Available from IBISWorld 2Scientific and Economic Consulting in Canada Industry Market Research Report Now Available from IBISWorld 3Laser makes microscopes way cooler 2
... Feb. 4 Art,s Way Manufacturing, Inc. (Nasdaq: ... subsidiary, Art,s Way Scientific, Inc. - Buildings For ... - http://www.buildingsforscience.com/ The new site, reflective ... enhanced, clean and more user-friendly.Art,s Way Scientific ( ...
... (Nasdaq: KNDL ) announced today that it will ... closes on Tuesday, Feb. 24, 2009. The Company will host ... 25 at 8:30 a.m. Eastern Time. A question and answer ... participate in the telephone conference call, interested parties in the ...
... Patients Achieved an Objective Tumor Response by End of ... Inc. (Nasdaq: PPHM ) today reported that ... endpoint in the first stage of its ongoing Phase ... cancer (NSCLC). The open-label, Simon two-stage study is ...
Cached Biology Technology:Art's Way Manufacturing Announces Launch of New Web Site For Art's Way Scientific - Buildings For Science 2Art's Way Manufacturing Announces Launch of New Web Site For Art's Way Scientific - Buildings For Science 3Kendle Announces Details Regarding Fourth Quarter and Full-Year 2008 Earnings and 2009 Guidance Release, Webcast and Conference Call 2Peregrine Pharmaceuticals' Bavituximab Achieves Primary Endpoint in First Stage of Phase II Lung Cancer Study 2Peregrine Pharmaceuticals' Bavituximab Achieves Primary Endpoint in First Stage of Phase II Lung Cancer Study 3Peregrine Pharmaceuticals' Bavituximab Achieves Primary Endpoint in First Stage of Phase II Lung Cancer Study 4
Normal human serum, single donor...
... Quality ISO 9001:2000 Certified ... All Precedures Validated, SOP's Training ... Process for All Procedures GLP Documentation Upon ... one stop shopping point for all your ...
Human IL-17D Affinity Purified Polyclonal Ab...
BBS/Glycerol/Casein Block and Diluent - 10X Concentrate, 1 L...
Biology Products: