Welcome to FIS   Sponsored By
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
[email protected]
www.fis.com

 


 Print


Click to know how to advertise in FIS
MORE NEWS
Spain
May 23, 22:40 (GMT + 9):
UMU joins European project to boost seabass and gilthead seabream production
Chile
May 23, 21:40 (GMT + 9):
New minimum size for sea urchin
United States
May 23, 03:00 (GMT + 9):
IN BRIEF - Oceana’s US unit proves to be a big catch
United States
May 23, 03:00 (GMT + 9):
IN BRIEF - Water pollution leading to feminization of male fish
United Kingdom
May 23, 03:00 (GMT + 9):
IN BRIEF - Aquaculture supply chain GBP 1 million innovation fund opens
New Zealand
May 23, 03:00 (GMT + 9):
New technological platform will contribute to tuna catch tracing
United States
May 23, 02:20 (GMT + 9):
Cutting-edge technology favours salmon extended shelf-life
United Kingdom
May 23, 02:00 (GMT + 9):
IN BRIEF - Invasive green crabs are putting the pinch on another clam harvest
Australia
May 23, 02:00 (GMT + 9):
IN BRIEF - Vietnam maintains deepwater fishing ban
Bangladesh
May 23, 02:00 (GMT + 9):
IN BRIEF - Small fish farmers face multifarious problems
Viet Nam
May 23, 02:00 (GMT + 9):
IN BRIEF - Vietnam, Indonesia Seek To Achieve USD 10 Billion Trade
Thailand
May 23, 02:00 (GMT + 9):
IN BRIEF - Top tuna firm Thai Union says Q2 sales to improve from Q1
India
May 23, 02:00 (GMT + 9):
IN BRIEF - Fisheries in Kochi thrive despite dip in sardines catch
Viet Nam
May 23, 02:00 (GMT + 9):
IN BRIEF - Experts stress a must for shrimp value chain
Norway
May 23, 01:50 (GMT + 9):
Innovative system developed to farm salmon offshore



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Norway lobster abundance in the Gulf of Cadiz studied through underwater images
Spain Researchers from the Spanish Institute of Oceanography will estimate the abundance of Norway lobster in the waters of the Gulf of Cadiz through underwater videos made with a photogrammetric sledge.
Bluefin tuna quota left uncaught, ensures CONAPESCA
Ecuador The Mexican tuna fleet has not yet completed the catch quota for bluefin tuna (Thunnus orientalis) established by the Inter-American Tropical Tuna Commission for Mexico.
IPNLF urges IOTC to improve tuna stock management in Indian Ocean
Indonesia The International Pole & Line Foundation and its Member network are urging the Indian Ocean Tuna Commission to further enhance the management of stocks and reduce bycatch in Indian Ocean’s tuna fisheries.
Vietnam’s shrimp exports remain stable in Q1
Viet Nam In the first quarter this year, Vietnamese shrimp exports reached the same value as the same period in 2016, at USD 618.3 million, Vietnam Association of Seafood Exporters & Producers reported.
 
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+Co.KG (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Nueva Pescanova, S.L. - Group Headquarters
Sea Harvest Corporation (PTY) Ltd.
I&J - Irvin & Johnson Holding Company (Pty) Ltd.
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 - 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. - Headquarters
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 - 2017 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER