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.

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 September 1, 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 September 1, 2014).

Share This




More Plants & Animals News

Monday, September 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

We've Got Mites Living In Our Faces And So Do You

We've Got Mites Living In Our Faces And So Do You

Newsy (Aug. 30, 2014) A new study suggests 100 percent of adult humans (those over 18 years of age) have Demodex mites living in their faces. Video provided by Newsy
Powered by NewsLook.com
Washington Wildlife Center Goes Nuts Over Baby Squirrels

Washington Wildlife Center Goes Nuts Over Baby Squirrels

Reuters - US Online Video (Aug. 30, 2014) An animal rescue in Washington state receives an influx of orphaned squirrels, keeping workers busy as they nurse them back to health. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Experimental Ebola Drug ZMapp Cures Lab Monkeys Of Disease

Experimental Ebola Drug ZMapp Cures Lab Monkeys Of Disease

Newsy (Aug. 29, 2014) In a new study, a promising experimental treatment for Ebola managed to cure a group of infected macaque monkeys. Video provided by Newsy
Powered by NewsLook.com
Killer Amoeba Found in Louisiana Water System

Killer Amoeba Found in Louisiana Water System

AP (Aug. 28, 2014) State health officials say testing has confirmed the presence of a killer amoeba in a water system serving three St. John the Baptist Parish towns. (Aug. 28) Video provided by AP
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