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:2/8/2017)... NEW YORK , Feb. 8, 2017 /PRNewswire/ ... an individual,s voice to match it against a ... voice such as pitch, cadence, and tone are ... systems require minimal hardware installation, as most PCs ... remotely for different transactions. Voice recognition biometrics are ...
(Date:2/8/2017)... , Feb. 7, 2017 Report Highlights ... The global ... reach $11.4 billion by 2021, growing at a compound annual ... - An overview of the global markets for synthetic biology. ... estimates for 2016, and projections of compound annual growth rates ...
(Date:2/8/2017)... , Feb. 7, 2017 Report Highlights ... billion by 2021 from $8.3 billion in 2016 at ... 2016 to 2021. Report Includes - An overview ... global market trends, with data from 2015 and 2016, ... 2021. - Segmentation of the market on the basis ...
Breaking Biology News(10 mins):
(Date:2/20/2017)... ... February 20, 2017 , ... USARAD ... company announces at HIMSS 2017 Annual Conference (Orlando, FL) a world-wide distribution ... a global cloud-based sharing and collaboration platform as part of the Siemens ...
(Date:2/20/2017)... ... February 20, 2017 , ... ... with catheters associated with peritoneal dialysis, announced today that it has published the ... connection system in Peritoneal Dialysis International (PDI), the official Journal of the ...
(Date:2/20/2017)...  At the 2017 Health Information Management Systems ... , IBM (NYSE: IBM ) today introduced ... President and CEO Ginni Rometty will ... 8:30-10 am ET, broadcast live on www.ibm.com ... examine the advent of the Cognitive Era and ...
(Date:2/19/2017)... ... February 19, 2017 , ... Expanding Portfolio ... outside of weighing equipment with the goal of expanding the reach of its ... line of Starter water analysis meters were introduced into the market in 2014. ...
Breaking Biology Technology: