Featured Research

from universities, journals, and other organizations

Age Of Fish Can Be Determined Through Cold War Era Radiocarbon Traces

Date:
February 21, 2008
Source:
National Oceanic And Atmospheric Administration
Summary:
Researchers at NOAA's Alaska Fisheries Science Center are finding trace radiocarbon (C-14) from Cold War nuclear bombs in the ear bones of fish, and turning this artifact of nuclear testing into a timestamp for determining fish ages.

Researchers at NOAA's Alaska Fisheries Science Center are finding trace radiocarbon (C-14) from Cold War nuclear bombs in the ear bones of fish, and turning this artifact of nuclear testing into a timestamp for determining fish ages.

Researchers have used traces of C-14 to confirm the ages of Pacific Ocean perch from the Gulf of Alaska, and have proven the method to be important information for fishery stock assessment and management. Alaska Fisheries Science Center researchers plan to apply the method to other fish species.

During the height of the Cold War in the late 1950's to early '70's, the United States, Russia, and other countries exploded enough above-ground nuclear bombs to raise the amount of C-14 in the atmosphere and in the surface layers of the ocean. C-14 has a half-life of 5,730 years. After the increase from the test bombing, C-14 has been decaying slowly in the environment, giving scientists a benchmark level for each year.

Fish ear bones, called otoliths, grow in 'rings' similar to annual growth rings found in trees.

Researchers know the year that the fish was collected, and can count growth rings back to estimate the age of the fish. If the amount of C-14 detected in the first growth ring of the otolith matches up with the expected environmental amount in that year, then the estimated age of the fish is correct.


Story Source:

The above story is based on materials provided by National Oceanic And Atmospheric Administration. Note: Materials may be edited for content and length.


Cite This Page:

National Oceanic And Atmospheric Administration. "Age Of Fish Can Be Determined Through Cold War Era Radiocarbon Traces." ScienceDaily. ScienceDaily, 21 February 2008. <www.sciencedaily.com/releases/2008/02/080217090548.htm>.
National Oceanic And Atmospheric Administration. (2008, February 21). Age Of Fish Can Be Determined Through Cold War Era Radiocarbon Traces. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2008/02/080217090548.htm
National Oceanic And Atmospheric Administration. "Age Of Fish Can Be Determined Through Cold War Era Radiocarbon Traces." ScienceDaily. www.sciencedaily.com/releases/2008/02/080217090548.htm (accessed July 22, 2014).

Share This




More Plants & Animals News

Tuesday, July 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Michigan Plant's Goal: Flower and Die

Michigan Plant's Goal: Flower and Die

AP (July 22, 2014) An 80-year-old agave plant, which is blooming for the first and only time at a University of Michigan conservatory, will die when it's done (July 22) Video provided by AP
Powered by NewsLook.com
San Diego Zoo Welcomes New, Rare Rhino Calf

San Diego Zoo Welcomes New, Rare Rhino Calf

Reuters - US Online Video (July 21, 2014) An endangered black rhino baby is the newest resident at the San Diego Zoo. Sasha Salama reports. Video provided by Reuters
Powered by NewsLook.com
Shark Sightings a Big Catch for Cape Tourism

Shark Sightings a Big Catch for Cape Tourism

AP (July 21, 2014) A rise in shark sightings along the shores of Chatham, Massachusetts is driving a surge of eager vacationers to the beach town looking to catch a glimpse of a great white. (July 21) Video provided by AP
Powered by NewsLook.com
$23.6 Billion Awarded To Widow In Smoking Lawsuit

$23.6 Billion Awarded To Widow In Smoking Lawsuit

Newsy (July 20, 2014) Cynthia Robinson claims R.J. Reynolds Tobacco Company hid the health and addiction risks of its products, leading to the death of her husband in 1996. Video provided by Newsy
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:
from the past week

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