Navigation Links
Tags reveal white sharks have neighborhoods in the north Pacific, say Stanford researchers
Date:11/3/2009

visits to the other nearshore hot spots.

"The sharks were detected frequently at their chosen site," Jorgensen said, "which means that they are patrolling around there nearly constantly, for long periods of time. They will occasionally visit one of the adjacent sites, but they always come back."

The team also was surprised to learn about new movements that the acoustic tags revealed in some nearshore locations. They found five white sharks were detected on acoustic receivers beneath the Golden Gate Bridge that originally were installed to listen for salmon, which migrate from the bay to the sea and back again. There are currently no detectors in San Francisco Bay, so there are no data to indicate how far or why the sharks crossed into the bay; however, seals and sea lions are in the region and could be potential prey for the large sharks. Five sharks also were acoustically detected close to shore in Hawaii off Waialua Bay and Kualoa Point on Oahu, and off the coast of Kona.

Genetics techniques were used to examine the relationships of the California sharks to all other white sharks examined globally. Studies of maternally inherited mitochondrial DNA sequences show that the populations are distinct, and suggest that the northeastern Pacific population may have been founded by a relatively small number of sharks in the late Pleistocene within the last 200,000 years or so. The other populations of white sharks are concentrated near Australia and South Africa.

Molecular geneticist Carol Reeb, a research associate at Stanford, said, "If you had asked us a few years ago, we would have said white sharks found in California probably migrated throughout the Pacific. Now, even though we know they travel great distances, their paths are surprisingly constrained to specific routes. This explains how a highly migratory marine species becomes a genetically isolated population. This also makes it much easier to appreciate how vulnerable the nor
'/>"/>

Contact: Louis Bergeron
louisb3@stanford.edu
650-725-1944
Stanford University
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. $15 million stimulus award creates national consortium for revealing scientific resources
2. Inconspicuous leaf beetles reveal environments role in formation of new species
3. New study reveals first ever method to genetically identify all 8 tuna species
4. Migratory route of Eleonoras falcon revealed for first time
5. The food-energy cellular connection revealed
6. Banded rocks reveal early Earth conditions, changes
7. UT Knoxville and ORNL researchers reveal key to how bacteria clear mercury pollution
8. Researchers go underground to reveal 850 new species
9. Mechanism related to the onset of various genetic diseases revealed
10. Evolution coup: Study reveals how plants protect their genes
11. Genomes reveal bacterial lifestyles: Research
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Tags reveal white sharks have neighborhoods in the north Pacific, say Stanford researchers
(Date:12/17/2014)... , Dec. 15, 2014 The Defense ... it easier to detect and prevent counterfeit microcircuits ... Today the agency started performing an in-house microcircuit ... validate the authenticity of purchased microcircuits while increasing ... quality control measures will be conducted at DLA,s ...
(Date:12/17/2014)... , Dec. 16, 2014  Automation is ... this more evident than at international borders. Over ... document scanners have allowed veteran travelers to self ... Passport Control (APC) Kiosks at an increasing number ... globe. According to Maxine ...
(Date:12/11/2014)... N.C. , Dec. 10, 2014  That blood pressure ... quite a while. Hypertension – the medical term for high ... the early 1800s, and the inflatable cuff that,s used in ... doesn,t, however, mean there,s nothing new about hypertension, its triggers ... long-held beliefs about the condition and the best ways to ...
Breaking Biology News(10 mins):Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 2Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 3Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2Research points to need for new approaches to treatment of high blood pressure 2Research points to need for new approaches to treatment of high blood pressure 3Research points to need for new approaches to treatment of high blood pressure 4
... Researchers have experimentally shown that some species of reef ... that stealthily attack them from behind and take a ... The study, published online on November 4 in ... punishment ultimately serves all members of the reef fish ...
... R.I. [Brown University] Drop that doughnut. In a ... $3.4 million grant from the National Cancer Institute, health ... a low-priced, fresh produce market within workplaces will motivate ... been no other studies like this," said Kim Gans, ...
... critical processes within the body, including muscle contraction, the ... calcium can be a bad thing. In excess, it ... severe muscle weakness, a fatal reaction to anesthesia or ... the Stanford Synchrotron Radiation Lightsource (SSRL) at the Department ...
Cached Biology News:To punish or not to punish: Lessons from reef fish and saber-tooth blennies 2To punish or not to punish: Lessons from reef fish and saber-tooth blennies 3Would convenient access to affordable fresh produce improve eating habits? 2Would convenient access to affordable fresh produce improve eating habits? 3X-rays offer first detailed look at hotspots for calcium-related disease 2
(Date:12/19/2014)... December 19, 2014 In contrast to ... LEDs with various colors, Valoya uses proprietary LED technology ... offers best possible uniformity which is critical in low ... high spectral accuracy throughout its lifetime which is up ... tubes. , "The investment cost was clearly higher ...
(Date:12/19/2014)... 2014 Egenix, Inc. is pleased to announce that ... the Board, to succeed Donald Fresne ; Mr. Fresne ... as a member of the Board.  In recognition of the ... company over almost twenty years, the Board designated Mr. Fresne ... has established a Search Committee to find a suitable replacement ...
(Date:12/17/2014)... Based on the revenues gained from surgical ... dominated by four major players contributing to approximately ... include GE Healthcare (U.K.), Siemens AG (Germany), Philips ... Report Copy at http://www.marketsandmarkets.com/Market-Reports/surgical-imaging-market-210534462.html , The ... to its strong product portfolio, which includes its ...
(Date:12/17/2014)... Long Beach, CA (PRWEB) December 17, 2014 ... Technology, Inc. to provide a larger packaged waste water ... district in King Abdullah Economic City (KAEC). Two years ... for EMAAR’s Jeddah Gate Development, serving two residential towers ... plant capacity is over a quarter million gallons per ...
Breaking Biology Technology:Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 2Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 3Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 4
... IN - Researchers from Purdue and Harvard universities have ... material that could replace silicon and have a 3-D ... approach could enable engineers to build faster, more compact ... less heat than today,s. The transistors contain tiny nanowires ...
... 2011 Monsanto , a major biotech ... has been given the  Worst Company of 2011 ... environment. The award was given by  natural health ... Monsanto the worst company of 2011. ...
... 6, 2011 Questcor Pharmaceuticals, Inc. (NASDAQ:   QCOR) ... Oppenheimer Healthcare Conference to be held on December 13-14, ... Chief Executive Officer, is scheduled to present an overview ... 2:45 p.m. ET.  A live webcast ...
Cached Biology Technology:New '3-D' transistors promising future chips, lighter laptops 2New '3-D' transistors promising future chips, lighter laptops 3Monsanto Declared Worst Company of 2011 by NaturalSociety 2Questcor Pharmaceuticals to Present at the Oppenheimer Healthcare Conference on December 13, 2011 2
... SpeedVac™ Concentrators set the standard for sample concentration ... with large chamber uses a combination of centrifugal ... in a single run. , SC210A comes equipped ... for long lasting chemical compatibility ...
Digital display of time, vacuum and temperature , Dual vacuum control of ramping rate and ultimate level , Comes complete with RH40-12 (40 x 1.5 ml) Rotor and (2) Glass Condensation Flasks. ...
... series of vacuum concentrators/centrifugal evaporators offers a ... to rapid and safe concentration of heat-labile ... with oil-free or high vacuum pumps, a ... selection of rotors (eliminating sample loss by ...
... George Paxinos Affiliation: School of Psychology, The University ... Affiliation: Curtin University of Technology, Perth, Australia This ... of the rat brain. It is a ... revison and extension of the compact 3rd edition. ...
Biology Products: