Featured Research

from universities, journals, and other organizations

White Shark Attack Shows They're Not Man-Eaters

Date:
August 29, 2003
Source:
University Of California - Davis
Summary:
Shark expert Peter Klimley, a UC Davis researcher, says the recent attack on a swimmer off Avila Pier in Central California supports his belief that adult great white sharks are selective hunters that would rather eat fat seals than bony human beings.

Shark expert Peter Klimley, a UC Davis researcher, says the recent attack on a swimmer off Avila Pier in Central California supports his belief that adult great white sharks are selective hunters that would rather eat fat seals than bony human beings.

Related Articles


Deborah Franzman was swimming at the surface among a group of pinnipeds -- seals or sea lions -- on Aug. 20 when a great white shark, estimated to be 15 to 18 feet long, grabbed her leg. It stripped the flesh from her left thigh, severing the femoral artery. She was briefly pulled below the surface and then released. When lifeguards reached her a few minutes later, she was facedown in the water. Authorities said she had bled to death.

"Certainly that shark could have consumed her if it had wanted to. But it hit her, then realized she was not a seal and let her go," Klimley said. "Sharks don't eat humans. Humans are not nutritious enough. They are not worth the effort."

Klimley's 30 years of scientific studies of white, hammerhead, nurse and other shark species' behavior are described in lay language in his entertaining new book, "The Secret Life of Sharks" (Simon & Schuster, $25). "I wrote this book as a public service. It provides knowledge, accurate knowledge, about sharks. If people are interested in this attack, or frightened by it, this book will tell them what happened. You can come to Central California and swim. It's safe. You just don't swim with seals or sea lions or near their colonies."

Klimley's studies of the great white (Carcharadon carcharias) include bite-by-bite analyses of 350 written eyewitness accounts of attacks on pinnipeds and 131 videotaped attacks. He has tracked them (including five adults for one month at a seal colony), made numerous discoveries about their hunting and feeding behaviors (they feed rarely, yet can live 45 days on a single bite, and they warn away food competitors by slapping their tails) and measured their stomach temperatures (unusually warm for a fish at 75 degrees F.).

It's the maintenance of that high core temperature that makes him think great whites need the energy contained in seal fat and don't intend to kill humans. "The fat in seals' outer coats makes up half their body weight and has twice the calories of muscle. Seals and sea lions, not people, are Power Bars for the white shark."


Story Source:

The above story is based on materials provided by University Of California - Davis. Note: Materials may be edited for content and length.


Cite This Page:

University Of California - Davis. "White Shark Attack Shows They're Not Man-Eaters." ScienceDaily. ScienceDaily, 29 August 2003. <www.sciencedaily.com/releases/2003/08/030829070957.htm>.
University Of California - Davis. (2003, August 29). White Shark Attack Shows They're Not Man-Eaters. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2003/08/030829070957.htm
University Of California - Davis. "White Shark Attack Shows They're Not Man-Eaters." ScienceDaily. www.sciencedaily.com/releases/2003/08/030829070957.htm (accessed December 22, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Christmas Kissing Good for Health

Christmas Kissing Good for Health

Reuters - Innovations Video Online (Dec. 22, 2014) Scientists in Amsterdam say couples transfer tens of millions of microbes when they kiss, encouraging healthy exposure to bacteria. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Brain-Dwelling Tapeworm Reveals Genetic Secrets

Brain-Dwelling Tapeworm Reveals Genetic Secrets

Reuters - Innovations Video Online (Dec. 22, 2014) Cambridge scientists have unravelled the genetic code of a rare tapeworm that lived inside a patient's brain for at least four year. Researchers hope it will present new opportunities to diagnose and treat this invasive parasite. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Earthworms Provide Cancer-Fighting Bacteria

Earthworms Provide Cancer-Fighting Bacteria

Reuters - Innovations Video Online (Dec. 21, 2014) Polish scientists isolate bacteria from earthworm intestines which they say may be used in antibiotics and cancer treatments. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Reuters - Innovations Video Online (Dec. 21, 2014) A team of scientists led by Danish chemist Jorn Christensen says they have isolated two chemical compounds within an existing antipsychotic medication that could be used to help a range of failing antibiotics work against killer bacterial infections, such as Tuberculosis. Jim Drury went to meet him. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins