Navigation Links
Hammerhead shark study shows cascade of evolution affected size, head shape
Date:5/18/2010

cephalofoils is an increased number of electrical sensors in their flattened noses and heads that can detect extremely weak electrical emissions from molecules associated with potential prey. "Hammerheads appear to be able to triangulate on their prey, which is remarkable," said Martin.

Small sharks are highly variable in the size and shape of their cephalofoils, said Martin. The winghead shark, for example, has a laterally expanded head that is about half the size of its roughly 4-foot body length. At the other end of the spectrum is the bonnethead shark, about 3 feet long but which has the smallest cephalofoil of all hammerhead species -- a protrusion that resembles the head of a shovel, Martin said.

Martin said that hammerheads are an ideal biological study subject in part because of some important similarities to humans. Both have slow growth rates, mature late in life, give live birth and have relatively few offspring. While hammerheads may have a dozen or more pups, other oceanic fish regularly lay millions of eggs. Hammerheads generally live for about 30 years, he said.

While hammerhead sharks appear intimidating, attacks on humans are extremely rare, said Martin. Hammerheads have relatively small mouths facing downward that are used to grab food like fish, shellfish, shrimp, squid, octopuses and stingrays. "If you see a hammerhead, I'd say grab your camera and jump into the water," said Martin.

"Hammerheads are special fish, and there is nothing that remotely resembles them anywhere on the planet," said Martin. Unfortunately, hammerheads -- like most shark species -- are on the decline. In addition to being overfished, sharks often are the victims of a technique known as finning, in which fishermen catch them, cut off their fins for use in delicacy soups, and return them to the water to die, Martin said. Shark meat also is used for fertilizer and to make pet food.

There currently are 233 shark species on
'/>"/>

Contact: Andrew Martin
andrew.martin-1@colorado.edu
303-492-2573
University of Colorado at Boulder
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Wide heads give hammerheads exceptional stereo view
2. Extinct giant shark nursery discovered in Panama
3. Study of shark virgin birth shows offspring can survive long term
4. New forensic technique gives clues about sharks from bite damage
5. Tags reveal white sharks have neighborhoods in the north Pacific, say Stanford researchers
6. New species of ghostshark from California and Baja California
7. Scientists shed new light on behavior of shark tweens and teenagers
8. Scientists conduct shark survey off US East Coast
9. Negligible impact on public safety from shark cage diving operations
10. Geographic profiling applied to track hunting patterns of white sharks in South Africa
11. From Jack the Ripper to great white sharks
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Hammerhead shark study shows cascade of evolution affected size, head shape
(Date:8/20/2015)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" ... the growing mobile commerce market and creator of the ... Card Alliance and the EMV Migration Forum.  ... Card Alliance Latin America (SCALA) Chapter provides NXT-ID, Inc. ... leaders promoting adoption of smart card technology. ...
(Date:8/17/2015)... Aug. 17, 2015  NXT-ID, Inc. (NASDAQ: NXTD ... focused on the growing mobile commerce market and creator ... campaign for Q4 2015. The new marketing campaign is ... of Amplitude Marketing Group ( http://amplitudemarketing.com/ ) and TPMG ... a leader in retail driven marketing and brand awareness ...
(Date:8/12/2015)... , Aug. 12, 2015  Synaptics Inc. ... human interface solutions, today announced that four of ... Match-in-Sensor solution, have officially been named FIDO Certified™ ... part of the certification, Synaptics, Natural ID™ fingerprint ... Universal Authentication Framework (UAF) standard and are interoperable ...
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 4NXT-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 3Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 2Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 3
... With its deeply embedded roots, sturdy trunk and dense ... structure of nearly unfathomable complexity and beauty. While major ... encompassing every living species, the project is still ... Biodesign Institute, Sudhir Kumar has been filling in the ...
... California, Davis, plant scientist has identified a source of carbon emissions ... change. While earlier studies have found that erosion can bury ... the new study published this week in the journal Proceedings ... that sink is only temporary. "It,s all part of figuring ...
... study show that episodes of reduced precipitation in the Southern ... rise in numbers of mountain pine beetles. The overabundance is ... first to chart the evolution of the current pine beetle ... of beetle outbreaks in the two primary host species, the ...
Cached Biology News:A new computational method for timing the tree of life 2A new computational method for timing the tree of life 3Carbon buried in the soil rises again 2Drought in 2001-2002 fueled Rocky Mountain pine beetle outbreak 2Drought in 2001-2002 fueled Rocky Mountain pine beetle outbreak 3Drought in 2001-2002 fueled Rocky Mountain pine beetle outbreak 4
(Date:8/26/2015)... , Aug. 26, 2015 /PRNewswire/ - iCo Therapeutics ("iCo" ... reported financial results for the quarter ended June ... in Canadian dollars and presented under International Financial ... activities with respect to our Oral Amp B ... contract manufacturer," said Andrew Rae , President ...
(Date:8/26/2015)... ... August 26, 2015 , ... Lee Biosolutions, a ... development and manufacture of highly valued cardiac markers used in early detection of ... with protein chemistry has led to the development and commercialization of important cardiac ...
(Date:8/26/2015)... Aug. 26, 2015  Platform therapeutic company Symic ... received a $1.5M Phase II SBIR grant from ... develop its therapeutic agent to reduce arteriovenous fistula ... end stage renal disease (ESRD) patients undergoing hemodialysis. ... of Diabetes and Digestive and Kidney Diseases (NIDDK), ...
(Date:8/26/2015)... August 26, 2015 Israel Proves Its Place ... 1 st place  Wayerz comes in 5 th ... Israel by venture capital fund JVP, with Chinese consulting ... China , Israel , ... Impressive achievement for the Israeli representatives in the final ...
Breaking Biology Technology:iCo Therapeutics Announces Second Quarter 2015 Financial Results 2iCo Therapeutics Announces Second Quarter 2015 Financial Results 3Lee Biosolutions Announces Increased Investment in the Development and Manufacturing of Biomarkers Used in Early Detection Of Heart Disease 2Symic Biomedical Awarded $1.5MM NIH Phase II SBIR Grant to Develop its Proteoglycan Mimetic Therapeutics to Reduce Vascular Access Failures in ESRD 2Symic Biomedical Awarded $1.5MM NIH Phase II SBIR Grant to Develop its Proteoglycan Mimetic Therapeutics to Reduce Vascular Access Failures in ESRD 3Israeli Startup Takes First Place at Shengjing Global Innovation Awards 2015 2Israeli Startup Takes First Place at Shengjing Global Innovation Awards 2015 3Israeli Startup Takes First Place at Shengjing Global Innovation Awards 2015 4Israeli Startup Takes First Place at Shengjing Global Innovation Awards 2015 5Israeli Startup Takes First Place at Shengjing Global Innovation Awards 2015 6
... Shengtai,Pharmaceutical, Inc. (OTC Bulletin Board: SGTI.OB) ("Shengtai,Pharmaceutical" ... distributor,of high-quality, pharmaceutical grade glucose products in ... as raw materials for food, beverage and,industrial ... a conference,call at 9:00 a.m. Eastern Time ...
... Oncology Biomarkers, FREMONT, Calif., Feb. 6 ... high-value molecular diagnostics company, today announced,the renewal ... University,on the development of novel biomarkers that ... monitoring of prevalent cancers, including,ovarian, breast and ...
... MONTVALE, N.J., Feb. 6 Synvista Therapeutics,Inc. (Amex: ... and Chief Executive Officer of Synvista will present at ... Monday, February 11,2008 at 3:30 p.m. Eastern Time. The ... at the Waldorf-Astoria Hotel in New York City., ...
Cached Biology Technology:Shengtai Pharmaceutical, Inc. Announces Conference Call to Discuss Second Quarter Results of Fiscal Year 2008 2Shengtai Pharmaceutical, Inc. Announces Conference Call to Discuss Second Quarter Results of Fiscal Year 2008 3Vermillion and Johns Hopkins Sign Collaborative Research and License Agreements to Develop Molecular Diagnostic Tests 2Synvista Therapeutics to Present at the 10th Annual BIO CEO & Investor Conference 2Synvista Therapeutics to Present at the 10th Annual BIO CEO & Investor Conference 3
Request Info...
albumin from bovine serum (BSA), fluorescein conjugate...
... Processing mini Tray (3 per pack), ... staining and blot processing.Automated staining of ... proteins and nucleic acid analysis.Prepares blots ... chromogenic detection.Programmable control of protocol, solution, ...
L1 Protein of Human Papilloma Virus Purified Anti-Viral-transformed cells clone CAMVIR-1, Isotype Mouse IgG 2a , 0.1 mg Consult technical datasheet for details....
Biology Products: