Navigation Links
New UF study shows some sharks follow 'mental map' to navigate seas
Date:3/9/2011

ore of Oahu, Hawaii, in 1999, nine blacktip reef sharks in the lagoons of Palmyra Atoll in the Central Pacific Ocean in 2009, and 15 thresher sharks off the southern California coast in 2010. The animals were followed for at least seven hours and the statistical analysis determined whether the sharks were moving randomly or toward a known goal.

While tiger sharks have acute senses of sight, hearing and smell, their home range covers hundreds of square miles, including resource spots outside their sensory range. As bounce divers, they also almost continuously swim between the surface and about 250 to 330 feet below.

"At times these tiger sharks were swimming across a deep channel, open ocean, often at night," Papastamatiou said. "So the question is, 'What are they orienting to in such a seemingly featureless environment?' It really just highlights how impressive their navigation can be."

Researchers determined adult thresher sharks could orient at greater distances than juveniles, most likely because of their advanced development, Papastamatiou said. The study found blacktip reef sharks only traveled randomly, which has to do with their small home range compared to larger areas covered by thresher and tiger sharks.

Papastamatiou speculated the "mental map" the sharks create may have to do with their ability to sense magnetic fields.

"Probably the most interesting sense and still the most misunderstood is magnetic reception," Papastamatiou said. "There is an increasing amount of evidence that lots of, if not all animals, can to a certain degree detect magnetic fields. That is something that could potentially be used over very large distances because there are gradients in the earth's magnetic field and they could use those as landmarks so even swimming through open ocean, which seems featureless to us, may not be featureless to sharks if they could detect these magnetic fields."

He said the research would potent
'/>"/>

Contact: Yannis Papastamatiou
ypapastamatiou@flmnh.ufl.edu
352-273-1955
University of Florida
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Long-term study shows effect of climate change on animal diversity
2. £2 million study to reveal workings of dementia genes
3. New study looks to define evangelicals and how they affect polling
4. CU-Boulder study suggests air quality regulations miss key pollutants
5. Researchers study acoustic communication in deep-sea fish
6. Study reveals homeowner perceptions in fire-prone areas
7. Researchers study how pistachios may improve heart health
8. Study: urban black bears live fast, die young
9. New study indicates link between weight gains during pregnancy and dieting history
10. Study reveals specific gene in adolescent men with delinquent peers
11. Sweat it out: UH study examines ability of sweat patches to monitor bone loss
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/21/2014)... developed a protein therapy that disrupts the process that ... sites, travel through the blood stream and start aggressive ... known as metastasis, can cause cancer to spread with ... succumb to cancer fall prey to metastatic forms of ... bioengineering who describes a new therapeutic approach in ...
(Date:9/19/2014)... study the unique bioelectric signaling system of the electric ... The OU researcher is working to understand how ... signals used to map the world around them. ... 500-600 discharges a second throughout their lives. The ... but necessary for survival. , "There is evidence that ...
(Date:9/19/2014)... species which over thousands of years has adapted to the ... that makes the cold dangerous for you. , This is ... and the cold provoking substance, called nonylphenol, comes from the ... suspected of being a endocrine disruptor, but when entering the ... ability to protect the cells in its body from cold ...
Breaking Biology News(10 mins):Stanford 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 4Environmental pollutants make worms susceptible to cold 2Environmental pollutants make worms susceptible to cold 3
... the first time, traced the nanoparticles taken up from ... states of their metallic elements. Zinc was shown to ... cerium did not dissolve into plant tissue. The results ... nanoparticles and whether engineered nanoparticles can enter into the ...
... JOLLA, CA----You might think you have nothing in common ... a plant from the mustard family, Salk scientists have ... directly regulate chemical reactions that quickly adjust the growth ... different body parts coordinate their growth, shedding light on ...
... the performance of technologies ranging from medical CT scanners ... extract specific information from huge collections of data and ... new approach is called model-based iterative reconstruction, or MBIR. ... and error, assessing probability and discarding extraneous information," said ...
Cached Biology News:X-rays reveal uptake of nanoparticles by soya bean crops 2X-rays reveal uptake of nanoparticles by soya bean crops 3Plants cut the mustard for basic discoveries in metabolism 2Plants cut the mustard for basic discoveries in metabolism 3New modeling approach transforms imaging technologies 2New modeling approach transforms imaging technologies 3New modeling approach transforms imaging technologies 4
(Date:9/22/2014)... Platelets, the tiny cell fragments whose job it is ... a cell nucleus. But they can "feel" the physical ... have discovered. , Platelets respond to surfaces with greater ... they "turn on" other platelets and other components of ... smarter than we give them credit for, in that ...
(Date:9/22/2014)... a way to create a highly sensitive chemical sensor ... imperfections have unique electronic properties that the researchers were ... molecules by 300 times. , The study is available ... . , Amin Salehi- Khojin, asst professor of mechanical ... graduate student and Bijandra Kumar, post doc where they ...
(Date:9/22/2014)... Topical BioMedics, Inc., is celebrating 20 years ... suffering, restoring hope an quality of life and contributing ... because of the innovative cellular biomedicines research that made ... , The company was founded in 1994 in ... chief of research, and Topricin inventor), Aurora Paradise (COO) ...
(Date:9/22/2014)... 2014 Invisible Sentinel Inc., a ... food and beverage industries, announced today that its ... a non-exclusive agreement by Enartis, a global provider ... an Esseco Group company headquartered in Trecate, Italy, ... and other global markets for their own in-winery ...
Breaking Biology Technology:Platelets modulate clotting behavior by 'feeling' their surroundings 2Graphene imperfections key to creating hypersensitive 'electronic nose' 2Topical BioMedics (Topricin) Celebrates 20 Years of Providing Hope and Quality of Life...As Topricin Is Declared “The 21st Century Standard of Care for Pain Management” 2Topical BioMedics (Topricin) Celebrates 20 Years of Providing Hope and Quality of Life...As Topricin Is Declared “The 21st Century Standard of Care for Pain Management” 3Topical BioMedics (Topricin) Celebrates 20 Years of Providing Hope and Quality of Life...As Topricin Is Declared “The 21st Century Standard of Care for Pain Management” 4Topical BioMedics (Topricin) Celebrates 20 Years of Providing Hope and Quality of Life...As Topricin Is Declared “The 21st Century Standard of Care for Pain Management” 5Topical BioMedics (Topricin) Celebrates 20 Years of Providing Hope and Quality of Life...As Topricin Is Declared “The 21st Century Standard of Care for Pain Management” 6Invisible Sentinel's Test for Wine-Spoilage Microbe to be Distributed by Enartis in Multiple Markets Globally 2Invisible Sentinel's Test for Wine-Spoilage Microbe to be Distributed by Enartis in Multiple Markets Globally 3
... produced in barley grain, using renewable,geothermal energy, ... Genetics,( http://www.orfgenetics.com ), an Icelandic biotechnology company, ... 22,000 ft^2 (2043m^2),cultivation facilities in Grindavik, Iceland. ... barley, ORF Genetics produces and,markets biorisk-free ISOkine(TM) ...
... Stock Exchange Symbol: MS, EDMONTON, May 13 /PRNewswire-FirstCall/ - ... of multiple sclerosis (MS), today,announced that Dr. Mark Krantz, Vice ... Oligonucleotide and Peptide,Technology and Product Development Conference in Las Vegas., ... at 10:45 am (PDT), WHERE: Red ...
... Pharmaceuticals Founder and Senior Management Form Company ... Specializing in Dermatology and Podiatry Markets, FAIRFIELD, N.J., ... commenced operations. The newly-formed,Company, led by the founder and ... (NYSE: BDY ), will develop, license and,commercialize innovative ...
Cached Biology Technology:ORF Genetics Opens Revolutionary 'Green Factory' in Iceland 2BioMs Medical to present at TIDES(R) Conference 2Medimetriks Pharmaceuticals, Inc. Begins Operations 2
... cDNA Library Panels were designed for full-length ... of PCRs to identify the desired cDNA ... in a 96-well "Master Plate," where each ... Having identified the positive well(s) by gel ...
... Analysis Note: Evaluated for its amino acid ... of amino acids Ala, Asp, Gly, Ile, Lys, ... Ser, Tyr. Preparation Unit Definition: One unit will ... 1.0 ml of water (1 cm light path). ...
... use as a carrier in ... Physical form: Solution in 10 ... 1 mM EDTA Preparation Note: ... Concentration: 10 mg/mL ...
... Cleland’s Reagent, Immobilized White solid. ... form of DTT on polyacrylamide resin with applications ... 233153 , 233156 , and ... no soluble components are added to the system. ...
Biology Products: