Featured Research

from universities, journals, and other organizations

Finding Baby Critically Endangered Goliath Grouper Fish Hiding In Mangroves With Help Of High-tech Sonogram

Date:
December 4, 2008
Source:
Ocean Research & Conservation Association
Summary:
Researchers have announced the world's first use of an acoustic underwater camera to survey juveniles of goliath grouper in mangrove habitats.

The Ocean Research & Conservation Association (ORCA) and its collaborators have announced the world's first use of an acoustic underwater camera to survey juveniles of goliath grouper in mangrove habitats.

Related Articles


Goliath grouper, Epinephelus itajara, currently is listed as critically endangered by the IUCN (International Union for the Conservation of Nature). The largest grouper fish in the Atlantic Ocean, goliaths can exceed six feet (2 meters) in length, weigh more than 1,000 pounds and can live more than 40 years. Juveniles (up to 3 feet, or 1 meter in length) spend almost the first decade of their lives in red mangrove nurseries.

ORCA adjunct scientist Dr. Sarah Frias-Torres and her colleagues at the University of Miami successfully demonstrated how this camera system, originally developed for the U.S. Department of Defense, can be used to conduct visual underwater surveys to evaluate the recovery of the species in the US (where it is protected) or the decline of the species in the Caribbean (where protection is lacking). In the past, such observations were often hindered by murky waters and low visibility typical of red mangrove habitat.

Similar to the sophisticated sonar of dolphins, the acoustic camera (referred to as DIDSON, or dual-frequency sonar) can "see" individual fish species and habitat by using sound waves, without the need of light or good visibility conditions. The resulting image resembles a medical prenatal ultrasound used for monitoring the development of human babies. In a way, it is an ultrasound of Mother Nature.

"This technology allows me to see where human eyes can't," said Dr. Sarah Frias-Torres, ORCA adjunct scientist and lead author of the study. "It's important to be able to show how the babies hide in the mangrove roots, because it provides critical information for protecting the species and a much stronger argument for protecting the habitat."

The study was conducted in the fringing red mangrove shorelines of the Florida Keys National Marine Sanctuary. This technique has previously been used to monitor salmon migrations entering rivers and detecting fish under ice. This is the first time this system has been used in mangrove habitat.

Coastal mangroves are an important nursery and habitat for many fish and invertebrate species that eventually migrate to nearby coral reefs. Mangrove habitat is often threatened by coastal development and pollution.

DIDSON offers great potential to complement underwater fish surveys in low visibility conditions, due to high turbidity, or during nocturnal surveys.

"This is a wonderful example of how cutting edge technology can be used to protect the ocean and the species that live there," said Dr. Edith Widder, ORCA president and senior scientist.

The research was funded by NOAA's Coral Reef Conservation Program, and conducted by researchers from the Ocean Research & Conservation Association (ORCA) and the University of Miami's Rosenstiel School of Marine and Atmospheric Sciences.


Story Source:

The above story is based on materials provided by Ocean Research & Conservation Association. Note: Materials may be edited for content and length.


Journal Reference:

  1. Sarah Frias-Torres, Jiangang Luo. Using dual-frequency sonar to detect juvenile goliath grouper Epinephelus itajarain mangrove habitat. Endangered Species Research, October 28, 2008 DOI: 10.3354/esr00138 Published online October 29, 2008

Cite This Page:

Ocean Research & Conservation Association. "Finding Baby Critically Endangered Goliath Grouper Fish Hiding In Mangroves With Help Of High-tech Sonogram." ScienceDaily. ScienceDaily, 4 December 2008. <www.sciencedaily.com/releases/2008/11/081120183736.htm>.
Ocean Research & Conservation Association. (2008, December 4). Finding Baby Critically Endangered Goliath Grouper Fish Hiding In Mangroves With Help Of High-tech Sonogram. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2008/11/081120183736.htm
Ocean Research & Conservation Association. "Finding Baby Critically Endangered Goliath Grouper Fish Hiding In Mangroves With Help Of High-tech Sonogram." ScienceDaily. www.sciencedaily.com/releases/2008/11/081120183736.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
New Fish Species Discovered, Setting Record for World's Deepest

New Fish Species Discovered, Setting Record for World's Deepest

Buzz60 (Dec. 22, 2014) A new species of fish is discovered living five miles beneath the ocean surface, making it the deepest living fish on earth. Jen Markham has the story. Video provided by Buzz60
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

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