Navigation Links
Magnetic map guides salmon home
Date:2/7/2013

For sockeye salmon coming home after years spent at sea, a magnetic map is apparently responsible for their remarkable sense of direction. That's according to an analysis of data collected over 56 years and reported online on February 7 in Current Biology, a Cell Press publication.

"To find their way back home across thousands of kilometers of ocean, salmon imprint on the magnetic field that exists where they first enter the sea as juveniles," said Nathan Putman of Oregon State University. "Upon reaching maturity, they seek the coastal location with the same magnetic field."

Scientists had suspected that animals including fish, sea turtles, and seals might imprint on magnetic fields and use their "sixth sense" as a kind of internal GPS system. But actually asking and answering the question has been exceedingly hard to do.

In the new study, Putman and his colleagues looked to sockeye salmon from British Columbia's Fraser River. Those fish leave the river for the sea just like any other Pacific salmon, Putman said. But there's a hitch.

"When they attempt to return, they are confronted with a giant obstacle: Vancouver Island is blocking direct access to their river!" he said. "So the fish must make a choice: Do they use the northern inlet or the southern inlet in their detour?"

If the fish really do follow magnetic fields, then their choice should vary in predictable ways over the years, the researchers reasoned. That's because of something known as geomagnetic field drift. In other words, the Earth's magnetic field isn't constant; it changes gradually over time based on the chaotic movement of the Earth's liquid outer core.

And that means that fish should show a greater preference in a given year for the inlet that most closely matches the magnetic value of the Fraser River when they left it two years before. Careful comparison by the researchers of fisheries data collected since the 1950s with a mo
'/>"/>

Contact: Mary Beth OLeary
moleary@cell.com
617-397-2802
Cell Press
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Salmon may use magnetic field as a navigational aid
2. First evidence of fish sensing geomagnetic fields from a Czech Christmas market
3. Video-article shows how to purify magnetic bacteria
4. The magnetic sense
5. TGen-US Oncology data guides treatment of metastatic triple-negative breast cancer patients
6. Animal magnetism: First evidence that magnetism helps salmon find home
7. Mechanisms involved in resistance to the bacteria Salmonella studied in a Ph.D. thesis
8. Salmon runs boom, go bust over centuries
9. Notre Dame research reveals migrating Great Lakes salmon carry contaminants upstream
10. Researchers uncover some good news for BCs troubled salmon populations
11. Assessing a new technique for ensuring fresh produce remains Salmonella-free
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Magnetic map guides salmon home
(Date:7/22/2014)... spot with natural tourism resources, a recent study revealed a ... Geoscience and Mineral Resources (KIGAM) indicated that there are the ... 5,000 years ago. That is the first time to actually ... volcano 5,000 years ago in the inland part of the ... The research team led by Dr. Jin-Young Lee confirmed in ...
(Date:7/22/2014)... The darker side of meerkats which sees them prevent ... explained in a new study. , Research into the desert ... pair and many adult helpers shows that the alpha ... breed. , The study shows how this way of life, ... can prove effective despite its sinister side. , Dominant ...
(Date:7/22/2014)... July 22, 2014, Cleveland: A type of immune ... diseases, such as Alzheimer,s disease and multiple sclerosis ... brain injury (TBI) and may slow the progression ... published today in the online journal Nature ... Bruce Trapp, PhD, Chair of the Department of ...
Breaking Biology News(10 mins):Jeju Island is a live volcano 2Cleveland Clinic researchers discover neuroprotective role of immune cell 2
... of North Africa,s major droughts of centuries past, reveals ... year 1179. The first multi-century drought reconstruction that ... droughts during the 13th and 16th centuries and the ... international research team figured out northwest Africa,s climate history ...
... University of Rochester Medical Center scientists discovered a defect ... earliest stages of abnormal skull development in newborns, known as ... pathways set off a cascade of events that regulate bone ... published May 25, 2010, in the journal Science Signaling ...
... Association today launched a first-of-its-kind educational tool to ... college and university professors provide evidence to support ... academic world is commonly predicated on judging a ... Sally T. Hillsman, ASA,s Executive Officer. "While teaching ...
Cached Biology News:20th century one of driest in 9 centuries for northwest Africa 220th century one of driest in 9 centuries for northwest Africa 3Stem-cell disruption induces skull deformity, UR study shows 2American Sociological Association launches first-of-its-kind teaching tool 2American Sociological Association launches first-of-its-kind teaching tool 3
(Date:7/23/2014)... La Jolla, CA (PRWEB) July 23, 2014 ... adipose stem cell therapy in the US aimed at ... today announced their newest clinical study for Parkinson’s disease. ... and efficacy of stem cell therapy are paramount when ... , This clinical study makes stem cell therapy accessible ...
(Date:7/23/2014)... July 23, 2014 ... of Trendlines Agtech , announced it has ... Israel,s leading agricultural thermoplastics applications companies. ... Valentis,s technology combines nanocrystalline cellulose (NCC), a biodegradable, ... additional nanoparticles to produce highly improved polymeric films. ...
(Date:7/23/2014)... (PRWEB) July 23, 2014 DuPont Pioneer ... business as vice president of Agricultural Biotechnology (ABT), effective ... where he served most recently as president, chief executive ... and business leadership in the seed and crop protection ... Paul E. Schickler , president of DuPont Pioneer. ...
(Date:7/23/2014)... , July 23, 2014 /PRNewswire/ - BioAmber ... biotechnology company producing sustainable chemicals, today announced that the ... full their option to purchase an additional 420,000 ... price of $12.00 per share, less underwriting discounts ... underwritten public offering of 2,800,000 shares of common ...
Breaking Biology Technology:StemGenex® Gives Hope to Parkinson’s Patients through New Stem Cell Clinical Study 2StemGenex® Gives Hope to Parkinson’s Patients through New Stem Cell Clinical Study 3Valentis Nanotech Signs MOU to Integrate Technology in Thermoplastics Production 2DuPont Pioneer Names Neal Gutterson to Lead Agricultural Biotechnology 2DuPont Pioneer Names Neal Gutterson to Lead Agricultural Biotechnology 3BioAmber announces exercise in full of underwriters' option in connection with previously priced follow-on offering 2BioAmber announces exercise in full of underwriters' option in connection with previously priced follow-on offering 3
... 4, 2008, SAN DIEGO, Oct. 27 Neurocrine ... Gorman, President and Chief,Executive Officer of Neurocrine Biosciences will ... New York., The live presentation takes place Tuesday, ... a.m. Pacific Time (PT). The presentation will,be simultaneously webcast ...
... BioTrends Research Group, Inc. was,named one of ... Philadelphia region by the Philadelphia 100(R), a joint ... Entrepreneurs, Forum of,Greater Philadelphia, and the Philadelphia Business ... "This recognition is a testament to the ...
... Osteotech, Inc.,(Nasdaq: OSTE ) announced today ... financial results will be released Friday, November 7,2008. ... Owusu-Akyaw, President and,Chief Executive Officer, as well as ... 2008, at 9:00 a.m. Eastern time. You are ...
Cached Biology Technology:Neurocrine Biosciences to Present at the Oppenheimer 19th Annual Healthcare Conference 2
BD BioCoat Matrigel Matrix 35 mm Culture Dishes Coating : BD MatrigelTM Basement Membrane Matrix ,Surface : ECM/attachment factors ,Surface area : 9.6 cm2 ,Dim nominal : 35 mm x 10 mm ,Vo...
BD BioCoat Fibronectin 35 mm Culture Dishes, tissue-culture treated polystyrene with a uniform application of human fibronectin....
... Mouse Antibody to Human Cytokeratin TYPE ... Basic (Type II) keratins. Including epidermal cell ... at 58kD, 65kD and 67kD. Broad keratin ... oesophagus and cornea. Immunogen: ...
BD BioCoat Fibronectin 150 mm Culture Dishes...
Biology Products: