Navigation Links
No place like home: New theory for how salmon, sea turtles find their birthplace
Date:12/1/2008

CHAPEL HILL How marine animals find their way back to their birthplace to reproduce after migrating across thousands of miles of open ocean has mystified scientists for more than a century. But marine biologists at the University of North Carolina at Chapel Hill think they might finally have unraveled the secret.

At the beginning of their lives, salmon and sea turtles may read the magnetic field of their home area and "imprint" on it, according to a new theory in the latest issue of the journal Proceedings of the National Academy of Sciences.

The Earth's magnetic field varies predictably across the globe, with every oceanic region having a slightly different magnetic signature. By noting the unique "magnetic address" of their birthplace and remembering it, animals may be able to distinguish this location from all others when they are fully grown and ready to return years later, researchers propose.

Previous studies have shown that young salmon and sea turtles can detect the Earth's magnetic field and use it to sense direction during their first migration away from their birthplace to the far-flung regions where they spend the initial years of their lives.

The new study seeks to explain the more difficult navigational task accomplished by adult animals that return to reproduce in the same area where they themselves began life, a process scientists refer to as natal homing.

"What we are proposing is that natal homing can be explained in terms of animals learning the unique magnetic signature of their home area early in life and then retaining that information," said Kenneth Lohmann, Ph.D., professor of biology in the UNC College of Arts and Sciences and the first author of the study. "We hope that the paper will inspire discussion among scientists and eventually lead to a way of testing the idea."

The theory builds on previous studies with sea turtles by Lohmann and his team. In 2001, they showed tha
'/>"/>

Contact: Patric Lane
patric_lane@unc.edu
919-962-8596
University of North Carolina at Chapel Hill
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Emphasis on conifer forests places multiple species at risk
2. Opportunity for students displaced by Katrina to assess climate vulnerability of Southeast US
3. IEEE-USA innovation forum will help prepare US tech leaders to prosper in a global marketplace
4. In-vitro fertilization improved with 3-D/4-D-guided embryo transfer and new placement target
5. Single-largest biodiversity survey says primary rainforest is irreplaceable
6. Katherine Freed wins first place at the International ISPE Undergraduate Poster Contest
7. Listen-up ladies: Dont postpone knee-replacement surgery
8. MU researcher links hormone replacement therapy to breast cancer
9. A place in the sun
10. Testosterone replacement theraphy beneficial in men 60 and older
11. Clues to ancestral origin of placenta emerge in Stanford study
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/29/2014)... cell,s nucleus, chromosomal DNA is tightly bound to ... call chromatin. Until about two decades ago, histones ... packing material around which the glamorous DNA strands ... greater appreciation for how DNA/histone interactions govern gene ... institutions studying the sequence of the genome from ...
(Date:8/29/2014)... of the Tibetan plateau -- the largest topographic anomaly ... both its profound effect on climate and its reflection ... GSA Bulletin , Katharine Huntington and colleagues employ a ... modern and fossil snail shells to investigate the uplift ... , Views range widely on the timing of surface ...
(Date:8/28/2014)... pleased to announce the selection of Dr. Fred Baxendale ... acknowledges those who have served ESA for at least ... the Society that has reached an extraordinary level. Candidates ... Board and then voted on by the ESA membership. ... at Entomology 2014, ESA,s Annual Meeting in Portland, Oregon ...
Breaking Biology News(10 mins):'K-to-M' histone mutations: How repressing the repressors may drive tissue-specific cancers 2'K-to-M' histone mutations: How repressing the repressors may drive tissue-specific cancers 3Snails tell of the rise and fall of the Tibetan Plateau 2Snails tell of the rise and fall of the Tibetan Plateau 3Snails tell of the rise and fall of the Tibetan Plateau 4Snails tell of the rise and fall of the Tibetan Plateau 5Snails tell of the rise and fall of the Tibetan Plateau 6Snails tell of the rise and fall of the Tibetan Plateau 7Fred Baxendale selected as Honorary Member of the Entomological Society of America 2
... , April 27 ARES Corporation ... operations division has been certified to the rigorous ... ISO 9001:2008 quality standard.  This certification signifies ARES, ... standards and strengthens our competitive position by standardizing ...
... , HOUSTON , April 27 Landry,s ... "Company") announced today that after lengthy negotiations with the Special ... the plaintiff in a lawsuit pending in Delaware , ... with the plaintiff,s attorneys to settle the stockholder derivative claim ...
... NEW YORK, April 27, 2010 The Juvenile Diabetes ... Living Cell Technologies (LCT), a New Zealand-based biotechnology company ... II clinical trial to study the safety and effectiveness ... treatment for type 1 diabetes with significant hypoglycemia unawareness. ...
Cached Biology News:ARES Aerospace and Defense Division Receives AS9100 Certification 2Landry's Restaurants, Inc. Announces Status of Acquisition by Tilman J. Fertitta and Tentative Partial Settlement of Delaware Lawsuit 2Landry's Restaurants, Inc. Announces Status of Acquisition by Tilman J. Fertitta and Tentative Partial Settlement of Delaware Lawsuit 3Landry's Restaurants, Inc. Announces Status of Acquisition by Tilman J. Fertitta and Tentative Partial Settlement of Delaware Lawsuit 4JDRF partners with LCT to test encapsulated cell replacement therapy for the treatment of diabetes 2JDRF partners with LCT to test encapsulated cell replacement therapy for the treatment of diabetes 3
(Date:8/28/2014)... research platform uses a laser to measure ... stress and heating, an approach likely to ... and batteries., This new technique, called nanomechanical ... and the surface stress of microscale structures ... the merits of surface-stress influence on mechanical ...
(Date:8/28/2014)... The ability for organizations to attract ... allow individuals to perform at the highest of levels, ... looking to compete in this post–recession era. The ... as the sector increasingly focuses on the importance of ... have real results on the organization's development and the ...
(Date:8/28/2014)... August 28, 2014 Sterlitech is proud ... membranes to its stable of products . ... weight cut-offs and include membrane filters with surface charges. ... in customer demand for our membrane process testing equipment, ... of flat sheet membranes,” explains Sterlitech President Mark Spatz. ...
(Date:8/28/2014)... BELLINGHAM, Washington, USA (PRWEB) August 27, 2014 ... Colorado next month for SPIE Laser Damage 2014 ... on optical materials for high-power lasers will run 14-17 ... international society for optics and photonics . , The ... key for understanding laser damage to optical materials will ...
Breaking Biology Technology:New analytical technology reveals 'nanomechanical' surface traits 2New analytical technology reveals 'nanomechanical' surface traits 3Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 2Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 3Sterlitech Corporation Enhances Its Selection of Flat Sheet Membrane Filters 2Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 2Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 3
... Therapeutics, Inc. (Nasdaq: TSRX ) announced today that ... present "Innovative Antibacterial Drugs by Design; The Trius Therapeutics Story" ... October 26, 2010 from 5:30-9:30 p.m. PT. ... . About Trius Therapeutics ...
... Pa., Oct. 22 Encorium Group, Inc. (Nasdaq: ... research organization (CRO) conducting studies in over 30 ... and biotechnology companies, today announced that, on October ... Listing Qualifications Panel (the "Panel") has determined to ...
... in German . Jena (21 October ... improving a fabrication process for Atomic Force Microscopy (AFM) probe ... surfaces so that even tiniest nano structures become visible. Knowledge ... of new materials and carrier systems for active substances. The ...
Cached Biology Technology:Encorium Announces NASDAQ Panel Decision to Delist Common Stock; Announces Changes to its Board of Directors 2Encorium Announces NASDAQ Panel Decision to Delist Common Stock; Announces Changes to its Board of Directors 3Encorium Announces NASDAQ Panel Decision to Delist Common Stock; Announces Changes to its Board of Directors 4AFM tips from the microwave 2
... can perform many sophisticated DNA analysis and protein ... than just another sequence analysis product. Imagine having ... analyses to be performed each time you have ... sheets which specify exactly how your output will ...
... does for enzyme-/substrate-based blotting what intensifying screens do ... up to 10-fold (or one order of magnitude) ... Signal Enhancer membrane treatment is a simple, 15-minute ... current Western blotting protocol. The result is an ...
These stopping screens are for the biolistic PDS-1000 He and Hepta systems. Supplied as 500 screens....
...
Biology Products: