Navigation Links
How diving leatherback turtles regulate buoyancy
Date:11/12/2010

ribing the accelerometer data Fossette says, "You can almost see the animal swimming. It's the first time we could see the locomotor activity during those deep dives."

Extracting the acceleration data that showed the leatherbacks' movements, the team could see that the turtles dived deeply at an average angle of 41deg as they began their descent. Initially the turtles swam with each flipper stroke lasting 3s, but as they descended further they swam less hard until they stopped swimming all together, became negatively buoyant and began gliding down. At the bottom of the dive, the turtles began swimming as they heading to the surface and continued swimming until they regained buoyancy near the surface and began gliding again.

Fossette explains that many diving animals exhale before they leave the surface to minimise the risk of decompression sickness, however, leatherbacks do not. They dive carrying a lung full of air. Curious to find whether leatherbacks vary the amount of air that they inhale to regulate their buoyancy, Fossette and Gleiss compared the depths at which the turtles became negatively buoyant with the maximum depth that they reached. The team found that the deepest divers remained buoyant the longest and started gliding at deeper depths. So the turtles probably regulate their buoyancy before diving by varying the amount of air they inhale. Fossette also says, "The nesting turtles may glide for 80 percent of the dive's descent to optimise their energetic reserves, which is crucial for the production of eggs."

The team is now keen to look at the diving patterns of leatherbacks in their foraging grounds in the North Atlantic. Fossette explains that nesting turtles lose weight while foraging turtles are gaining weight and this could affect their buoyancy and diving behaviour. However, tagging a 400kg turtle in the ocean is a much bigger problem than tagging them on a beach.


'/>"/>

Contact: Kathryn Knight
kathryn@biologists.com
44-078-763-44333
The Company of Biologists
Source:Eurekalert

Page: 1 2

Related biology news :

1. Negligible impact on public safety from shark cage diving operations
2. Scientists identify worlds largest leatherback turtle population
3. Scientists call for protected swimways for the endangered leatherback sea turtle
4. Commercial fishing estimated to kill millions of sea turtles
5. How can accidental captures of loggerhead turtles be reduced?
6. Turtles Christmas journey tracked by scientists
7. National Science Foundation Fellow uses ultrasound to research bog turtles
8. Turtles no longer turned into souvenirs
9. Cost of hatchling turtles dash for freedom
10. No place like home: New theory for how salmon, sea turtles find their birthplace
11. Turtles alter nesting dates due to temperature change says ISU researcher
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/21/2014)... what was previously thought, newborn immune T cells may ... bacteria, according to a new study led by King,s ... to that of adults, babies may still be able ... published in the journal Nature Medicine . , ... types of immune cells, including neutrophils which play an ...
(Date:9/21/2014)... a protein therapy that disrupts the process that causes ... travel through the blood stream and start aggressive new ... as metastasis, can cause cancer to spread with deadly ... to cancer fall prey to metastatic forms of the ... who describes a new therapeutic approach in Nature ...
(Date:9/19/2014)... by researchers from several Harvard University labs in ... and aspiring researchers with the intellectual raw materials ... from soft, flexible materials. , With the advent ... advances in manufacturing technology, soft robotics is emerging ... from conventional rigid robot design, but working with ...
Breaking Biology News(10 mins):Immune system of newborn babies is stronger than previously thought 2Stanford researchers create 'evolved' protein that may stop cancer from spreading 2Stanford researchers create 'evolved' protein that may stop cancer from spreading 3Stanford researchers create 'evolved' protein that may stop cancer from spreading 4Soft robotics 'toolkit' features everything a robot-maker needs 2
... - A study comparing a University of Pennsylvania ... to the traditional American method has shown that 80 ... traditional method are actually at risk for developing osteoarthritis ... The results indicate that traditional scoring of radiographs that ...
... most established fisheries certifier is failing on its promises ... leading fisheries experts from the University of British Columbia ... California at San Diego and elsewhere. Established in ... of the world,s largest fish retailers, the Marine Stewardship ...
... but estrogen might not be the reason. Testosterone, though, could ... the lab of Florida State University researcher Mohamed Kabbaj, associate ... a five-year, $1.8 million grant from the National Institute of ... research team also is working to identify the role of ...
Cached Biology News:Hip dysplasia susceptibility in dogs may be underreported, according to Penn Vet comparative study 2Hip dysplasia susceptibility in dogs may be underreported, according to Penn Vet comparative study 3Hip dysplasia susceptibility in dogs may be underreported, according to Penn Vet comparative study 4Seafood stewardship questionable: UBC-Scripps experts 2Seafood stewardship questionable: UBC-Scripps experts 3Why does anxiety target women more? FSU researcher awarded $1.8 million grant to find out 2
(Date:9/19/2014)... -- Dublin ... the addition of the  "Micro Market Monitor : ...      (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , , ,The ... segments in the chromatography market. The market was ... to reach $2.0 billion by 2019, at a ...
(Date:9/19/2014)... LONDON , September 19, 2014 ... Spain , available today on PharmaBoardroom.com ... of the Eurozone crisis that rocked the Spanish economy in ... the Spanish pharma community has remained pragmatic in times of ... is still the fifth biggest European market, and the ...
(Date:9/18/2014)... HealthTronics, Inc ., a leading ... and services, announced that a poster related to ... external beam radiotherapy (EBRT) is being presented at ... (MAAUA) Annual Meeting in Baltimore, Maryland September 18-21, ... and External Beam Radiation as Treatments for Localized ...
(Date:9/18/2014)... 2014 /PRNewswire-iReach/ -- DeepResearchReports.com adds "2014 Deep Research ... and "2014 Deep Research Report on Global and ... database. Photo - http://photos.prnewswire.com/prnh/20140918/147058 ... Global and China Acetic Acid Industry" is a ... China and Global Acetic Acid Market. ...
Breaking Biology Technology:Micro Market Monitor : Global Pre-packed Chromatography Columns 2PharmaBoardroom Releases New Spain Pharmaceuticals Report 2PharmaBoardroom Releases New Spain Pharmaceuticals Report 3HealthTronics Announces Data Comparing Cryotherapy Versus Radiation for Treating Prostate Cancer Poster Presented at the American Urological Association Regional Meeting 2Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 2Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 3Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 4
... body, then alarm bells start ringing. Such clumps, ... type 2 diabetes, formerly called adult-onset diabetes. If ... might be able to treat such diseases more efficiently. ... the Helmholtz-Zentrum Dresden-Rossendorf and the university in Aarhus, Denmark, ...
... The Plasma Protein Therapeutics Association (PPTA) applauds the ... Drugs Act ( H.R. 2672 ) and ( S. ... therapies that treat patients with rare diseases by eliminating barriers ... on plasma protein therapies are coping with a very rare ...
... (NASDAQ: GPRO ) today reported financial results for ... million and non-GAAP earnings per share (EPS) of $0.51.   ... products in the second quarter of 2011, while supply chain ... sales a year ago," said Carl Hull, the Company,s president ...
Cached Biology Technology:In the pursuit of dangerous clumps 2In the pursuit of dangerous clumps 3PPTA Praises Legislation That Protects the Treatment of Rare Diseases 2Gen-Probe Reports Financial Results for the Second Quarter of 2011 2Gen-Probe Reports Financial Results for the Second Quarter of 2011 3Gen-Probe Reports Financial Results for the Second Quarter of 2011 4Gen-Probe Reports Financial Results for the Second Quarter of 2011 5Gen-Probe Reports Financial Results for the Second Quarter of 2011 6Gen-Probe Reports Financial Results for the Second Quarter of 2011 7Gen-Probe Reports Financial Results for the Second Quarter of 2011 8Gen-Probe Reports Financial Results for the Second Quarter of 2011 9Gen-Probe Reports Financial Results for the Second Quarter of 2011 10Gen-Probe Reports Financial Results for the Second Quarter of 2011 11Gen-Probe Reports Financial Results for the Second Quarter of 2011 12Gen-Probe Reports Financial Results for the Second Quarter of 2011 13Gen-Probe Reports Financial Results for the Second Quarter of 2011 14
UltraPure DNase/RNase-Free Distilled Water is designed for use in all molecular biology applications. It is 0.1-m membrane-filtered and tested for DNase and RNase activity....
...
Water Distilled (Gibco™) is membrane filtered and endotoxin screened....
Immunogen: Human Respiratory Syncytial Virus (RSV) and Bovine Respiratory Syncytial Virus (BRSV) Fusion protein Storage: -20 C, Avoid Freeze/Thaw Cycles...
Biology Products: