Welcome to FIS   Sponsored By
United States
Subscribe to FIS | Register with FIS | Advertise with FIS | Newsletter | About FIS | Contact us
   


Antarctic krill (Euphausia superba) could be vital in the fertilization of the Southern Ocean with iron. (Photo: antarctica.ac.uk)

Krill provide iron for Southern Ocean: study

Click on the flag for more information about United Kingdom UNITED KINGDOM
Tuesday, July 05, 2011, 03:10 (GMT + 9)

An international team of researchers has found that Antarctic krill could be vital in the fertilization of the Southern Ocean with iron and thereby the stimulation of phytoplankton growth. This enrichment betters the ocean’s ability to store CO2.

The tiny shrimp-like crustacean is the staple diet for various fish, penguins, seals and whales, as well as being caught by commercial fisheries for human consumption by way of omega-3-rich krill oil and other products.

In findings published this month in the journal Limnology and Oceanography, researchers describe how Antarctic krill (Euphausia superba), instead of residing mostly in surface waters, regularly spend time on the sea floor feeding on iron-rich fragments of decaying organisms. The krill then swim back up to the surface of the ocean and release the iron from their stomachs and into the water.

"We are really excited to make this discovery because the textbooks state krill live mainly in surface waters,” said lead author from British Antarctic Survey Dr Katrin Schmidt. 

“We knew they make occasional visits to the sea floor but these were always thought as exceptional. What surprises us is how common these visits are – up to 20 per cent of the population can be migrating up and down the water column at any one time," she noted.

The team of researchers dissected the stomach contents of more than 1,000 krill harvested from 10 Antarctic research expeditions and discovered that the krill caught near the surface contained high levels of iron-rich material from the seabed in their stomachs. 

Plus, the scientists studied photographs of krill on the sea floor, acoustic data and net samples, all of which gave sturdy evidence that the crustaceans frequently feed at the bottom of the sea.

These recent findings have implications for managing commercial krill fisheries and can help better comprehend the natural carbon cycle in Antarctica’s Southern Ocean.

“The next steps are to look at exactly how this iron is released into the water," Schmidt added.

Antarctica’s krill fishery is expanding. It is managed by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR).

An estimated 100-500 million tonnes of krill -- similar to the weight of the world's human population -- roam in the Southern Ocean.

Related articles:

- Amazing numbers of krill, whales shed light on climate change's effects 

- Krill fleet likely to be modernized 

By Natalia Real
editorial@fis.com
www.fis.com

 


 Print


Click to know how to advertise in FIS
MORE NEWS
Australia
May 22, 23:50 (GMT + 9):
Mass farmed salmon deaths raises concerns in Tasmania
Oman
May 22, 23:40 (GMT + 9):
Oman closes its ports to pirate fishing
Ecuador
May 22, 23:20 (GMT + 9):
CNA concerns about atypical mortalities in Honduras shrimp farms
Spain
May 22, 23:00 (GMT + 9):
Fishery resources to be assessed in Newfoundland Bank
United States
May 22, 22:20 (GMT + 9):
Genetics provide new hope for endangered freshwater mussels
Norway
May 22, 21:30 (GMT + 9):
Salmon price status at week 21
United States
May 22, 04:00 (GMT + 9):
IN BRIEF - Drought leaves no water to combat salmon-killing parasite
United States
May 22, 04:00 (GMT + 9):
IN BRIEF - Geoduck farming takes off as demand for clams grows in Asia
Australia
May 22, 04:00 (GMT + 9):
IN BRIEF - Australia's commercial fishing industry catches millions of tonnes more than reported: researchers
China
May 22, 04:00 (GMT + 9):
IN BRIEF - Fujian's law enforcement cracks down on illegal fishing
Republic of Ireland
May 22, 04:00 (GMT + 9):
IN BRIEF - Coveney Welcomes Proposed Ban on Fishing for Seabass in Waters Around Ireland
Malaysia
May 22, 04:00 (GMT + 9):
IN BRIEF - Malaysia Shrimp Industry Association demands Luas not to charge water extraction
Norway
May 22, 03:40 (GMT + 9):
IN BRIEF - Cermaq Group AS: Cermaq becomes partner to EAT
United States
May 22, 03:30 (GMT + 9):
Inspection programme raises controversy at Senate
Argentina
May 22, 03:00 (GMT + 9):
Glaciar Pesquera adds new scallop vessel



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Firms benefitting from bluefin tuna quota express uncertainty
Mexico The four tuna companies that can catch 3,000 tonnes of bluefin tuna (Thunnus orientalis) in the Pacific assigned to Mexico are unaware of the reason why the National Aquaculture and Fisheries Committee seeks to set limits on each of them.
Improved biodiesel from fish and cooking oil
Spain Researchers from Granada (Spain) and Campina (Brazil) Universities succeeded in developing a new type of biodiesel that is more resistant to oxidation from mixing fish oil with cooking oil.
Blocked merger with US Foods might pose heavy loss for Sysco
United States The biggest US food distributor, Sysco will have to face about USD 1 billion in costs if a lawsuit to block the merger with US Foods filed early this year has its way.
Horse mackerel fishery negatively affects Oceana's results
South Africa Oceana Group Limited´s results in the six months ended 31 March were affected by increased horse mackerel quota costs and adverse conditions, offsetting the positive performance of the remaining divisions.
 
Maruha Nichiro Corporation
Nichirei Corporation -Headquarter-
Pesquera El Golfo S.A.
Ventisqueros - Productos del Mar Ventisqueros S.A
Wärtsilä Corporation -Wartsila Group Headquarter-
ITOCHU Corporation -Headquarter-
BAADER - Nordischer Maschinenbau Rud. Baader GmbH (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Pescanova, S.A. - Group Headquarters
Sea Harvest Corporation (PTY) Ltd.
I&J - Irvin & Johnson Limited
Blue Continent Products (Pty) Ltd - (Oceana Group Limited)
Pesquera San Jose S.A.
Nutreco N.V. - Head Office
CNFC China National Fisheries Corporation - Group Headquarters
W. van der Zwan & Zn. B.V.
SMMI - Sunderland Marine Mutual Insurance Co., Ltd. - Headquarters
Icicle Seafoods Inc. -Headquarter-
Starkist Seafood Co. - Headquearters
Trident Seafoods Corp.
American Seafoods Group LLC - Head Office
Marel ehf - Group Headquarters
SalMar ASA - Group Headquarters
Sajo Industries Co., Ltd
Hansung Enterprise Co.,Ltd.
BIM - Irish Sea Fisheries Board (An Bord Iascaigh Mhara)
CEFAS - Centre for Environment, Fisheries & Aquaculture Science
COPEINCA ASA - Corporacion Pesquera Inca S.A.C.
Chun Cheng Fishery Enterprise Pte Ltd.
Food Project (Siam) Co., Ltd.
VASEP - Vietnam Association of Seafood Exporters & Producers
Gomes da Costa
Furuno Electric Co., Ltd. (Headquarters)
NISSUI - Nippon Suisan Kaisha, Ltd. - Group Headquarters
FAO -Food and Agriculture Organization- Fisheries and Aquaculture Department (Headquarter)
Hagoromo Foods Co., Ltd.
Koden Electronics Co., Ltd. (Headquarters)
A.P. Møller - Maersk A/S - Headquarters
BVQI - Bureau Veritas Quality International (Head Office)
UPS - United Parcel Service, Inc. - Headquarters
Hamburg Süd Group - (Headquearters)
Armadora Pereira S.A. - Group Headquarters
NOAA - National Oceanic and Atmospheric Administration (Headquarters)
Omega Protein Corporation -Headquarter-
Marona S.A.
Marine Harvest ASA - Headquarters
Marubeni Europe Plc -UK-
Findus Ltd
Icom Inc. (Headquarter)
WWF Centroamerica
Oceana Group Limited
The David and Lucile Packard Foundation
Ajinomoto Co., Inc. -Headquarter-
Friosur S.A. - Headquarters
Cargill, Incorporated - Global Headquarters
Benihana Inc.
Leardini Pescados Ltda
Mitsubishi Corporation Marine Products Depts. D.Team
CJ Corporation  -Holding Headquarter-
Greenpeace International - The Netherlands
David Suzuki Foundation
Fisheries and Oceans Canada -Communications Branch-
Mitsui & Co.,Ltd - Headquarters
Ocean Trawlers Group - Ocean Trawlers HK Ltd.
Natori Co., Ltd.
Carrefour Supermarket - Headquarters
FedEx Corporation -Headquarter-
AKBM - Aker BioMarine ASA
Seafood Choices Alliance -Headquarter-
Austevoll Seafood ASA
Walmart / Wal-Mart Stores, Inc. (Supermarket) -Headquarter-
New Japan Radio Co.Ltd (JRC) -Head Office-
Gulfstream JSC
INVE Group - Head Office
Marine Stewardship Council - MSC Worldwide Headquarters
Royal Dutch Shell plc (Headquarter)
Genki Sushi Co.,Ltd -Headquarter-
Iceland Pelagic ehf
AXA Assistance Argentina S.A.
Caterpillar Inc. - Headquarters
Tiger Brands Limited
Morpol ASA - Group Headquarters
SeaChoice
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2015 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER