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:7/13/2015)... Calif. , July 13, 2015 ... developer of human interface solutions, today announced sampling ... touch and display driver integration (TDDI) product targeting ... the first to combine Synaptics , best-in-class ... proven display driver technology developed in the company,s ...
(Date:7/9/2015)... DUBLIN , July 07, 2015 ... has announced the addition of the "Biometrics ... and Forecasts 2015-2020" report to their offering. ... a major contributor to this growth and the ... US$5.5 billion in revenue for companies involved in ...
(Date:7/8/2015)... Summary Pancreatic cancer is the 12th ... with a mortality rate of 10.9 deaths per 100,000 ... patients has highlighted a significant need for new and ... by the current market. A highly active pancreatic ... molecule types and mechanisms of action, which provides a ...
Breaking Biology News(10 mins):Synaptics Announces Sampling of Second Generation TDDI Solutions 2Synaptics Announces Sampling of Second Generation TDDI Solutions 3Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 2Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 3Frontier Pharma: Pancreatic Cancer - Identifying and Commercializing First-in-Class Innovation 2Frontier Pharma: Pancreatic Cancer - Identifying and Commercializing First-in-Class Innovation 3
... and VIENNA, Nov. 1, 2012 BiOptix today announced that ... commercially available SPR instrument to incorporate phase-based common path interferometry ... Amsterdam from November 1 - 3 as well as at ... 8.  "At the Label Free and PEGS ...
... the rise due to changing diets in emerging economies, ... scientists and institutions in hopes of mitigating the problem. ... experts to further secure its domestic food supply from ... chain disruptions. Food security and nutrition research are ...
... March, the director-general of the World Health Organization warned ... it." In the not-too-distant future, said Margaret Chan, "Things ... knee could once again kill." , The culprit: the ... drugs, a phenomenon known as antibiotic resistance. Chan singled ...
Cached Biology News:BiOptix to highlight new 404pi instrument at European symposia 2Malaysia to battle 'nutrition transition' problem emerging worldwide: More income, poorer diet choices 2Malaysia to battle 'nutrition transition' problem emerging worldwide: More income, poorer diet choices 3Malaysia to battle 'nutrition transition' problem emerging worldwide: More income, poorer diet choices 4Malaysia to battle 'nutrition transition' problem emerging worldwide: More income, poorer diet choices 5Malaysia to battle 'nutrition transition' problem emerging worldwide: More income, poorer diet choices 6WSU researcher to study ecology of antibiotic resistance 2
(Date:7/30/2015)... 30, 2015 AACC welcomed thousands of ... AACC Annual Meeting & Clinical Lab Expo in ... The meeting showcased revolutionary advancements in clinical testing ... healthcare providers to diagnose patients quickly and accurately ... As of Wednesday, July 29, ...
(Date:7/30/2015)... ... July 30, 2015 , ... ... Vieillard as Sales & Marketing Director. , With more than 25 years ... responsible for reinforcing Tronics’ business development activities worldwide. He brings to the company ...
(Date:7/30/2015)... Washington , July 30, 2015 ... Market, by Product (Software, Molecular Modeling, PB/PK, PKPD, Trial ... Discovery & Development, Preclinical, Clinical Trial), by End Users ... Biosimulation Market is expected to reach USD 2,107.99 million ... a CAGR of 15.29%. Browse more ...
(Date:7/30/2015)... Kan. , July 30, 2015   ... a pet therapeutics company focused on the licensing, ... companion animals, today announced that its strategic partner ... a dose confirmation study of AT-016, an adipose-derived ... for the treatment of osteoarthritis pain in dogs. ...
Breaking Biology Technology:Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 2Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 3Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 4Tronics appoints Francois Vieillard as Sales and Marketing Director 2Biosimulation Market Worth 2,107.99 Million USD by 2020 2Biosimulation Market Worth 2,107.99 Million USD by 2020 3Biosimulation Market Worth 2,107.99 Million USD by 2020 4Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 2Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 3Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 4Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 5
... , NEW YORK, Dec. 8 ... report is available in its catalogue: , ... , http://www.reportlinker.com/p0164353/Biotechnology-Instrumentation---International-Market-Trends.html , Demand for ... the pharmaceutical industry, proteomics, genomics, functional genomics and ...
... Dec. 8 Vivakor, Inc. (OTC Bulletin Board: VIVK) today ... 1, 2009 will receive the dividend of shares of common ... Board of Directors. HealthAmerica is a private Nevada corporation of ... on the record date. The distribution date will be December ...
... , ROTTERDAM, The ... on reducing prostate cancer,mortality has been given a boost with ... Cancer (ERSPC). This shows the true impact to,be far higher ... Preliminary ERSPC findings* showed that screening reduced prostate ...
Cached Biology Technology:Reportlinker Adds Biotechnology Instrumentation - International Market Trends 2Reportlinker Adds Biotechnology Instrumentation - International Market Trends 3Reportlinker Adds Biotechnology Instrumentation - International Market Trends 4Reportlinker Adds Biotechnology Instrumentation - International Market Trends 5Reportlinker Adds Biotechnology Instrumentation - International Market Trends 6Reportlinker Adds Biotechnology Instrumentation - International Market Trends 7Vivakor Announces Mechanics of Dividend Distribution 2Vivakor Announces Mechanics of Dividend Distribution 3Boost for Prostate Cancer Screening - Report Shows Mortality Reduction as High as 31% 2
... Myeloblastosis Virus Reverse Transcriptase (AMV RT) catalyzes ... RNA or RNA:DNA hybrids (1). It requires ... than RNA primers) as well as Mg2+ ... RNase H activity. Both nonionic detergents and ...
DNase I (Deoxyribonuclease I) digests single- and double-stranded DNA to oligodeoxyribonucleotides. Ribonuclease activity has been reduced to non-detectable levels....
... RNase-Free DNase is a preparation of ... double-stranded DNA to produce 3-hydroxyl oligonucleotides. ... in applications where maintaining the integrity ... is qualified for use with the ...
... Liquid. In 100 mM KCl, 20 ... 20% glycerol, pH 7.9. AVOID FREEZE/THAW CYCLES. Human ... protein of 765 amino acids encoded by a ... positive and negative supercoiled DNAs without the requirement ...
Biology Products: