Navigation Links
UF scientists trace origin of shark's electric sense

ain and travel into the developing shark's head, creating the framework for the electrosensory system - a previously unknown function of a much-studied group of cells, according to Renata Freitas, a doctoral candidate in UF's zoology department and first author of the paper.

The process mirrors the development of the lateral line that allows fishto mechanically sense their environment, and organs of the inner ear that enable people to keep their balance. But scientists suspect as human ancestors emerged from the sea, they discarded their lateral lines as well as their ability to sense electrical fields.

"Our fishy ancestors had the anatomy for it," said James Albert, aformer UF biologist who is now at the University of Louisiana. "You can imagine how valuable this system would be if you were aquatic, because water is so conductive. But it doesn't work on land - air doesn't conduct electricity as well. When it happens, it's called a lightning bolt and you don't need special receptors to sense it."

All primitive animals with backbones could sense electricity, according to Michael Coates, an associate professor of organismal biology and anatomy at the University of Chicago. Mammals, reptiles and birds lost the sense over time, as did most fish alive today.

But in sharks and a few other species, such as sturgeons and lampreys, electrosensory capability endured.

"Most fish you see today have large eyes," Coates said. "But sharks arepredators that do not particularly rely on vision. If you see a hammerhead shark searching for flatfish, it moves its head back and forth, almost as if it were using a metal detector. Knowing that the electrosensory system may have developed with involvement of neural crest cells is valuable for people trying to reconstruct vertebrate evolution. It gives us further indication of how all of the various sensory systems come on line."

But the idea that the neural crest truly is the source of the e
'"/>

Source:University of Florida


Page: 1 2 3

Related biology news :

1. Wisconsin scientists grow critical nerve cells
2. UCSB scientists probe sea floor venting to gain understanding of early life on Earth
3. UAB scientists discover the origin of a mysterious physical force
4. Fox Chase Cancer Center scientists identify immune-system mutation
5. Weizmann Institute scientists develop a new approach for directing treatment to metastasized prostate cancer in the bones.
6. U-M scientists find genes that control growth of common skin cancer
7. UCLA scientists transform HIV into cancer-seeking missile
8. RNA project to create language for scientists worldwide
9. Carnegie Mellon scientists develop tool that uses MRI to visualize gene expression in living animals
10. To control germs, scientists deploy tiny agents provocateurs
11. Leprosy microbes lead scientists to immune discovery
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: scientists trace origin shark electric sense

(Date:7/11/2014)... creating a new professorship in tissue engineering to ... Molecular Engineering and the Marine Biological Laboratory, supported ... and Eugene Bell Foundation., The Eugene Bell Professorship ... for Molecular Engineering. That endowed chair holder also ... Eugene Bell Center for Regenerative Biology and Tissue ...
(Date:7/11/2014)... National Institute of Standards and Technology (NIST) need ... effectively, they often prove that necessity is truly ... recently for M. Lorna De Leoz and Stephen ... of glycomics. Glycomics is the study of the ... attached to proteins and lipids and influence cellular ...
(Date:7/11/2014)... relationships with other group members to reduce aggression and ... the strategy for grooming activities shows a certain pattern ... the scientific journal Biology Letters . , Grooming ... practiced without ulterior motives. To be groomed has hygienic ... grooming another individual can provide access to infants, mating ...
Breaking Biology News(10 mins):New professorship in tissue engineering links molecular engineering, marine biology 2Baboons groom early in the day to get benefits later 2
... 14, 2011In a letter to Maine,s two Senators, Susan Collins ... Broihier, MS, RD., said, "I would like to thank you ... that,s particularly important to our statethe amount of potatoes and ... lunch program. Broihier wrote, "First, there is no question ...
... the palo verde, mesquite and acacia trees throughout the Southwestern ... survival of their offspring against the parasitic wasp species that ... are the seed beetles Mimosestes amicus , living all ... all but invisible to our eyes or nearly so. ...
... 14, 2011 As the United States nears another ... (BGU) have determined scientifically, for the first time, that ... According to Prof. Hagit Cohen from the Anxiety ... Sciences, "We understand that emotional changes are related and ...
Cached Biology News:This beetle uses eggs as shields against wasps 2This beetle uses eggs as shields against wasps 3This beetle uses eggs as shields against wasps 4This beetle uses eggs as shields against wasps 5Voting causes stress according to Ben-Gurion University of the Negev study 2
(Date:7/11/2014)... , July 11, 2014 , Not ... in, into or from any jurisdiction where to do so ... jurisdiction.  Shire plc ("Shire" or the "Company") (LSE: ... this afternoon.  Shire confirms it has held a meeting with ... by Shire without the prior agreement or approval of AbbVie. ...
(Date:7/11/2014)... Research ( http://www.bccresearch.com ) reveals in its new report, ... MARKETS , the global market for digital polymerase chain ... This is estimated to grow to $490 billion in ... of 28.6%. , New digital PCR technology has created ... broader PCR field. The opportunities presented by this technology ...
(Date:7/11/2014)... MISSISSAUGA, ON , July 11, 2014 /CNW/ - ... Canada approved APTIOM TM (eslicarbazepine acetate) for use ... partial-onset seizures in patients with epilepsy who are not ... not indicated for use in patients under 18 years ... the most common neurological disorders and according to Epilepsy ...
(Date:7/11/2014)... (PRWEB) July 11, 2014 Cayenne ... company specializing in the soft tissue reconstruction segment, ... Anchor System for surgeries involving the shoulder and ... through a novel, inserter-controlled deployment method. The unique ... partial deployment, anchor pull-out, or anchor displacement (also ...
Breaking Biology Technology:Shire plc - Statement re: Media Speculation 2Global Market for Digital Polymerase Chain Reaction Technology to Reach $490 Billion by 2018; Equipment Sector Accounts for the Fastest Growing Segment With 33% CAGR 2Global Market for Digital Polymerase Chain Reaction Technology to Reach $490 Billion by 2018; Equipment Sector Accounts for the Fastest Growing Segment With 33% CAGR 3Sunovion Pharmaceuticals Canada Inc. Announces Health Canada Approval of APTIOM(TM) (eslicarbazepine acetate) as a Once-Daily Adjunctive Treatment for Partial-Onset Seizures in Patients with Epilepsy 2Sunovion Pharmaceuticals Canada Inc. Announces Health Canada Approval of APTIOM(TM) (eslicarbazepine acetate) as a Once-Daily Adjunctive Treatment for Partial-Onset Seizures in Patients with Epilepsy 3Sunovion Pharmaceuticals Canada Inc. Announces Health Canada Approval of APTIOM(TM) (eslicarbazepine acetate) as a Once-Daily Adjunctive Treatment for Partial-Onset Seizures in Patients with Epilepsy 4Cayenne Medical Launches SureLock™ All-Suture Anchor System for Shoulder and Extremity Surgery 2Cayenne Medical Launches SureLock™ All-Suture Anchor System for Shoulder and Extremity Surgery 3
... ... ... PRXL ), a leading global biopharmaceutical services,organization, today announced the ... technology organization. By combining,ClinPhone with Perceptive Informatics, PAREXEL,s wholly-owned technology,subsidiary, ...
... p.m. ET Today -, SUNNYVALE, Calif., Aug. 14 ... its fourth quarter,and fiscal year ended June 30, 2008. The ... million, or $0.18 per share, compared to a net loss ... of fiscal 2007., Total operating expenses were $4.8 million ...
... aerospace and ocean engineering at Virginia Tech, has received ... Junior Faculty Award. The award will support Philen,s research ... material and structural systems that have the unique ability ... these innovative materials will lead to new and exciting ...
Cached Biology Technology:PAREXEL Closes the Acquisition of ClinPhone 2PAREXEL Closes the Acquisition of ClinPhone 3PAREXEL Closes the Acquisition of ClinPhone 4PAREXEL Closes the Acquisition of ClinPhone 5Pharmacyclics Reports Fourth Quarter and Fiscal 2008 Financial Results 2Pharmacyclics Reports Fourth Quarter and Fiscal 2008 Financial Results 3Pharmacyclics Reports Fourth Quarter and Fiscal 2008 Financial Results 4Pharmacyclics Reports Fourth Quarter and Fiscal 2008 Financial Results 5Pharmacyclics Reports Fourth Quarter and Fiscal 2008 Financial Results 6
CELLine System cultivation flask (for secreted products)...
... StabilCoat Plus Microsphere/Microarray Stabilizer is an aqueous ... and other non-toxic chemicals in a PBS ... 7.4. This product contains a combination ... a preservative. StabilCoat Plus Stabilizer provides ...
... The mini incubation trays are ... to screen antigens that have ... Each tray has eight 10.5 ... that accommodate strips cut from ...
... designed for quick and easy protein purification ... two 0.25mm holes laser cut at the ... remain liquid-tight during incubation of the gel ... protein diffuses from the gel into the ...
Biology Products: