Navigation Links
Study suggests more fish than thought may thrive in the ocean's depths
Date:6/30/2010

A study of the occurrence of fishes in the ocean's deepest reachesthe hadal zone, below 6000 metershas provided evidence that some species of fishes are more numerous at such depths than experts had thought. The authors of the study, which is published in the July/August issue of BioScience, observed 10 to 20 snailfish congregating at a depth of 7703 meters around a baited video lander in the Japan Trench. The observation period lasted only five hours, so the occurrence of so many snailfish, which were of the species Pseudoliparis amblystomopsis, was a surprise. Together with a critical review of past records of fishes found at great depths, the observations suggest, however, that few species of fishes survive in the darkness of the hadal zone.

Observations at such extreme depthsfive times farther down than the oil leak in the Gulf of Mexico resulting from the Deepwater Horizon rigare technically demanding and consequently rare. The researchers who conducted the new study, Toyonobu Fujii of the University of Aberdeen, United Kingdom, and four of his colleagues, used a free-fall lander that made video recordings of an illuminated patch of the sea floor for one minute every five minutes. This enabled the scientists to distinguish at least 10 individual fish and record their behavior, which was similar to the behavior of fishes observed in 1965 from a bathyscaphe at a depth of 7300 meters in the west Atlantic. The fishes observed by Fujii and colleagues fed on crustaceans that were attracted to the mackerel bait.

How deep fish can live has long been a controversial question. Previous records of fish supposedly captured at great depth are rare and mostly based on trawls, a technique that is subject to uncertainty about exactly when a fish entered the trawl net. Fujii and colleagues remark that "current understanding of the hadal environment is inadequate." They nonetheless suggest that fish may routinely occur far deeper than previously thought in ocean trenches, and that "liparids do appear to dominate and characterize hadal fish fauna." More research is necessary, the authors say, to learn how these fish populations interact with those in shallower water.


'/>"/>

Contact: Jennifer Williams
jwilliams@aibs.org
202-628-1500
American Institute of Biological Sciences
Source:Eurekalert

Related biology news :

1. Childhood obesity indicates greater risk of school absenteeism, Penn study reveals
2. A study by the MUHC and McGill University opens a new door to understanding cancer
3. Study begins to reveal clues to the cause and progression of sepsis
4. Clones on task serve greater good, evolutionary study shows
5. New study warns limited carbon market puts 20 percent of tropical forest at risk
6. New study examines how rearing environment can alter navigation
7. Study links cat disease to flame retardants in furniture and to pet food
8. New continent and species discovered in Atlantic study
9. Study shows link between alcohol consumption and hiv disease progression
10. Feeling hot, hot, hot: New study suggests ways to control fever-induced seizures
11. Study finds environmental tests help predict hospital-acquired Legionnaires disease risk
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/17/2016)... , March 17, 2016 ABI ... intelligence, forecasts the global biometrics market will reach ... impressive 118% increase from 2015. Consumer electronics, particularly ... embedded fingerprint sensors anticipated to reach two billion ... Dimitrios Pavlakis , Research Analyst at ...
(Date:3/15/2016)... -- Yissum Research Development Company of the Hebrew ... Hebrew University, announced today the formation of Neteera ... human biological indicators. Neteera Technologies has completed its first ... ... emissions from sweat ducts, enables reliable and speedy biometric ...
(Date:3/14/2016)... , Allemagne, March 14, 2016 ... ) - --> - Renvoi : image ... --> --> ... biométriques, fournit de nouveaux lecteurs d,empreintes digitales pour ... de DERMALOG sera utilisé pour produire des cartes ...
Breaking Biology News(10 mins):
(Date:5/23/2016)... , May 23, 2016 - Leading CRO,s ... - Frontage Implement a Single Platform to Manage End-to-end ... Traceability Within the Bioanalytical lab Frontage Laboratories, a full-service ... States and China , has selected ... facilities. In addition to serving as the global electronic lab notebook ...
(Date:5/20/2016)... ... ... Kablooe Design, a leading provider of product design and development services to medical ... “We have worked hard to build long-term relationships,” says President and CEO, Tom KraMer. ... serving their product design and development needs through the years.” , Kablooe has earned ...
(Date:5/19/2016)... There is no saying when ... relentless pressures in pricing and lack in consumer confidence. ... though - numerous opportunities are up for grabs but ... presents four names in this sector: Portola Pharmaceuticals Inc. ... VTAE ), Anthera Pharmaceuticals Inc. (NASDAQ: ...
(Date:5/18/2016)... ... May 18, 2016 , ... Shimadzu ... at The University of Toledo. This two-day camp will take place annually starting ... the field of pharmaceutical sciences in preparation for a university academic program. ...
Breaking Biology Technology: