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:8/20/2015)... ., Aug. 20, 2015 NXT-ID, Inc. (NASDAQ: ... authentication company focused on the growing mobile commerce market ... has joined The Smart Card Alliance and the EMV ... Alliance and the Smart Card Alliance Latin America (SCALA) ... industry peers and thought leaders promoting adoption of smart ...
(Date:8/18/2015)... , Aug. 18, 2015  Navitas ... key contributor to the Submission Content Management ... IRISS, a non-profit forum. Dedicated to the Implementation ... a neutral platform for industry, vendors, health ... information and work towards a standard method ...
(Date:8/17/2015)... 17, 2015  NXT-ID, Inc. (NASDAQ: NXTD ) ... on the growing mobile commerce market and creator of ... for Q4 2015. The new marketing campaign is being ... Amplitude Marketing Group ( http://amplitudemarketing.com/ ) and TPMG ( ... leader in retail driven marketing and brand awareness and ...
Breaking Biology News(10 mins):NXT-ID, Inc. Joins Smart Card Alliance and EMV Migration Forum 2NXT-ID, Inc. Joins Smart Card Alliance and EMV Migration Forum 3NXT-ID, Inc. Joins Smart Card Alliance and EMV Migration Forum 4Navitas, a Key Contributor in IRISS Forum Webinar 2Navitas, a Key Contributor in IRISS Forum Webinar 3NXT-ID, Inc. Launches Sales Campaign for Wocket Smart Wallet with Award Winning Marketing Team 2NXT-ID, Inc. Launches Sales Campaign for Wocket Smart Wallet with Award Winning Marketing Team 3
(Date:8/31/2015)... and SHANGHAI , Aug. 31, ... company developing next-generation antibiotics, today announced positive top-line ... for its lead drug candidate MRX-I. MRX-I is ... bacteria such as MRSA and VRE, while offering ... therapeutic option than currently available oxazolidinone agents. ...
(Date:8/31/2015)... , Aug. 31, 2015 Trimb Healthcare AB ... to acquire YouMedical Group BV ("YouMedical"), a Dutch OTC ... total annual sales of approximately EUR 16 million, with ... "Our ambition is to build a leading ... step toward that goal. YouMedical gives us a stronger ...
(Date:8/31/2015)... (PRWEB) , ... August 31, 2015 , ... There’s a ... Minerva is the first commercially available new FDA approved system in the last ... rate of 92%, the high Amenorrhea (zero bleeding) rate of 66%, the high Patient ...
(Date:8/28/2015)... DUBLIN , Aug. 28, 2015 ... announced the addition of the "Global & USA ... offering. The highly awaited US Biosimilar market ... highly awaited filigrastim biologic, Zarxio. How will the global ... The author reveals that biosimilars could save the US ...
Breaking Biology Technology:MicuRX Reports Positive Top-Line Results In Phase 2 Clinical Trial For Novel Antibiotic MRX-I In Complicated Skin And Soft Tissue Infections 2U.S. FDA Approves Minerva Endometrial Ablation System 2U.S. FDA Approves Minerva Endometrial Ablation System 3Global & USA BioSimilar Market Analysis Report 2015-2021 2Global & USA BioSimilar Market Analysis Report 2015-2021 3
Cached News: