HOME >> BIOLOGY >> NEWS
How do marine turtles return to the same beach to lay their eggs?

benefit? The study has shown that the marine turtles navigation system allows them to maintain their course towards the egg-laying site wherever they find themselves. It is almost as if they were equipped with a compass pointing towards the beach in question. So they can correct any deflection they are subject to: transport by boat, ocean currents But, unlike human navigators, they are not able to correct for ocean drift in plotting their course. So the movements recorded by the satellite are a combination of deliberate action by the turtles and the effect of currents. So it appears that the turtles navigation system is relatively simple and may cause them to be wander at sea for long periods during adverse ocean conditions. One turtle released 250 km from its egg-laying site on Europa traveled more than 3 500 km in two months before returning there!

In the second experiment, the researchers have studied the effect of the earths magnetic field on the turtles navigation system. They have shown, for the first time in natura, that marine turtles use the magnetic field of the earth to orientate themselves. When this field is disturbed by placing a powerful magnet on their heads, turtle navigation is not as good. But the fact that they can still return to their original egg-laying site shows that the geomagnetic field is not the only information source that they use. Researchers think the turtles may also use their sense of smell like certain sea birds or homing pigeons. This hypothesis remains to be proven

This work should improve conservation strategies for marine turtles, an endangered, officially protected species, by providing a better understanding of how they manage these long migrations between egg-laying and feeding areas.


'"/>

Contact: Monica McCarthy
monica.mccarthy@cnrs-dir.fr
0033-196-445-191
CNRS
26-Feb-2007


Page: 1 2

Related biology news :

1. MIT team building robotic fin for submarines
2. New tool for marine conservation
3. Bigelow Laboratory Scientists develop new approach to study marine microbes
4. Study warns deep-sea mining may pose serious threat to fragile marine ecosystems
5. Study shows marine omega-3 fatty acids have positive effect on muscle mass
6. US conservation efforts bring more marine turtles to UK
7. US conservation efforts bring more marine turtles to UK
8. Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply
9. Darwins famous finches and Venters marine microbes
10. Smithsonian scientists discover new marine species in eastern Pacific
11. Regardless of global warming, rising CO2 levels threaten marine life

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: How marine turtles return the same beach lay their eggs

(Date:12/22/2014)... and Markets ( http://www.researchandmarkets.com/research/fx4bg3/the_global ) has ... Watermarking and Fingerprinting Markets" report to their ... This insight provides an overview of ... Watermarking aims to control and monitor piracy by ...
(Date:12/19/2014)... LAS VEGAS , Dec. 18, 2014   LaunchKey ... built for the post-password and Internet of Things era, ... seed funding. The venture round was led by Metamorphic ... Capital, Rimrock Venture Partners, VegasTechFund, and others.  LaunchKey has ...
(Date:12/17/2014)... Research and Markets ( http://www.researchandmarkets.com/research/9zq33j/global_chemical ) has ... Market 2015-2019" report to their offering. ... trend upcoming in this market is the increasing demand ... in recording of patient data for quick and correct ...
Breaking Biology News(10 mins):The Global Watermarking and Fingerprinting Markets 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3Global Chemical Sensor Market 2015-2019: Key Vendors are Abbott Laboratories, Bayer, Hoffmann La-Roche, Johnson & Johnson, NGK Spark Plugs and Robert Bosch 2
(Date:1/22/2015)... 22, 2015 Shimadzu Scientific Instruments ... multipurpose UV-visible spectrophotometer. Offering wavelength scanning from 190 ... ideal for applications in a variety of industries, ... The user-friendly UV-1280 enables intuitive operation, while the ...
(Date:1/22/2015)... today announces the firm brokered a long-term lease totaling 202,492 ... company, at Two Ledgemont Center in Lexington, Massachusetts ... and Brian Cohen , senior vice president, represented Shire ... Hayden Ave. Photo - http://photos.prnewswire.com/prnh/20150122/170765 ...
(Date:1/22/2015)... 22, 2015 Protocol Networks brings independent ... team of brand-neutral, independent consultants, Protocol Networks has recently ... that over the years, his company has attracted several ... of Plainfield, as well as others. With the success ...
(Date:1/22/2015)... 2015 zFlo Motion , a US ... an exciting product from a new partner. STT-Systems ... the past 15 years, with offerings in the optical-motion capture, ... IMU system (inertial measurement unit), iSen, is opening eyes around ...
Breaking Biology Technology:Shimadzu’s New Monitored Single-Beam UV-Vis Spectrophotometer Offers Comprehensive Measurement Options in a Compact Body 2Transwestern?RBJ Advises Shire in 202,000 SF Lease, Creating Boston's Largest Suburban Biotech Campus 2Protocol Networks Brings Independent Technology Consulting to the Constitution State 23D Motion Capture Just Got Easy 2
Cached News: