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


Osten Jensen(R), Arne Fredheim(L) and Pal Lader. (Photo: Svanhild Stormyr Aabakken/Vidar Vassvik)

Salmon can be farmed in submerged sea cages: CREATE

Click on the flag for more information about Norway NORWAY
Thursday, February 17, 2011, 04:00 (GMT + 9)

It was thought to be impossible to farm salmon in submerged sea cages. But new research from the Centre for Research-based Innovation in Aquaculture Technology (CREATE) in Trondheim demonstrates otherwise. These findings may also prove valuable in combating sea lice and algae.

The salmon swim bladder requires an air supply in order to regulate the fish’s buoyancy. Until now, however, no one realised just how seldom salmon need to surface for air.

This need is being quantified by researchers at CREATE, one of 14 Norwegian Centres for Research-based Innovation established four years ago with funding from the Research Council of Norway.

“We kept salmon in completely submerged cages for 17 days. The individuals swam somewhat faster than usual but they did not exhibit stress. We also tested the pain threshold for how long salmon can continuously stay below the surface. It took four months for them to become excessively stressed,” says Dr. Arne Fredheim, Research Manager at CREATE.

The centre’s researchers believe that submerged cages can be used for extended periods – as long as the cages are lifted to the surface at regular intervals to give the fish access to air.

“But more research is needed to adequately determine their threshold limits,” asserts Dr Fredheim.

Using submerged cages is advantageous for avoiding storm damage and resisting invasion by algae and sea lice. There is also growing evidence that submersion may increase the effectiveness of sea lice medicines.

CREATE carries out research and develops technology for the sea-cage phase of “fattening up” production fish for the market.

“Our research is part technology and part biology, and interactions are crucial. For instance, we are examining the effects of aquatic temperature, salinity and oxygen content on fish behaviour and welfare. This is fundamental knowledge on which we will base our technology development,” explains Dr Fredheim.

In the project “Cage Environment”, researchers at CREATE studied hypoxia (oxygen depletion in the aquatic environment) to ascertain critical threshold limits for fish welfare.

At the same time, they gained a better understanding of how seawater flows through cage netting. Even though aquaculture sites are placed in sea areas with strong natural currents, there can be too little oxygen in the water at times – which impedes fish digestion.

“We have developed models for calculating how strong the current must be in relation to cage size and fish density. We have also studied how fish group behaviour affects the current. They often swim in circles en masse, creating a rising spiral current,” says Senior Scientist Pål Lader, who works at CREATE. 

One of the centre’s main research partners is a research group at the University of New Hampshire in the US. This collaboration has given rise to visits by several guest researchers and exciting project activities.

SINTEF Fisheries and Aquaculture AS is the host institution for CREATE. The centre will be funded for an eight-year period (2007-2014), with a budget of NOK 20 million (EUR 2.5 million) per year, half of which comes from the Research Council.

CREATE’s three industrial partners are leading suppliers of aquaculture equipment:

The centre’s key research partners are:

editorial@fis.com
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
Finland
Sep 29, 02:40 (GMT + 9):
IN BRIEF - Newly introduced fish species set to replace imported salmon
United States
Sep 29, 02:40 (GMT + 9):
IN BRIEF - University of New Hampshire launches aquaculture farming project
China
Sep 29, 02:20 (GMT + 9):
Aquatic Foods experiences revenue drop in H1
Mexico
Sep 29, 02:10 (GMT + 9):
PROFEPA certifies TED installation in shrimp fleet
Norway
Sep 29, 02:00 (GMT + 9):
IN BRIEF - Havfisk ASA: insiders have accepted the offer from Lerøy Seafood Group
United Kingdom
Sep 29, 02:00 (GMT + 9):
IN BRIEF - Global fish and seafood market will see consistent healthy growth through to 2020, says MarketLine
Norway
Sep 29, 02:00 (GMT + 9):
IN BRIEF - Construction underway of onshore salmon broodstock and egg production facility
Australia
Sep 29, 02:00 (GMT + 9):
IN BRIEF - Okehampton Bay salmon farm proposal receives in-principle council backing
United Kingdom
Sep 29, 02:00 (GMT + 9):
IN BRIEF - Activists protest against unsustainable tuna at Eastbourne store
Australia
Sep 29, 02:00 (GMT + 9):
IN BRIEF - Okehampton Bay salmon farm proposal receives in-principle council backing
American Samoa
Sep 29, 01:40 (GMT + 9):
IN BRIEF - American Samoa plant to shut over fish shortage
European Union
Sep 29, 01:40 (GMT + 9):
Medium term strategy to help protect Mediterranean fish stocks
United States
Sep 29, 01:10 (GMT + 9):
Light emission method helps detect harmful bacteria in food
European Union
Sep 28, 23:50 (GMT + 9):
Brussels proposes sharp cuts for Baltic cod quota
Canada
Sep 28, 23:30 (GMT + 9):
Grieg to set up largest indoor Atlantic salmon farming facility in Newfoundland



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Vietnam’s largest fishmeal factory starts operations
Viet Nam The largest fishmeal factory in Vietnam, which required a USD 3 million investment, has just started its operations in the province of Ca Mau, in the south of the country.
Fishermen sue Taiwanese steel firm over massive fish kill
Viet Nam Hundreds of Vietnamese fishermen have sued a Taiwanese steel company, accusing it of dropping toxic chemicals that caused a massive fish kill off the central Vietnamese coast in April.
China to invest USD 3 billion on fisheries and aquaculture projects
Iran The agriculture ministers of Iran and China signed two fisheries and aquaculture cooperation deals to boost bilateral ties in those two sectors.
First 'marine monument' created in the Atlantic
United States The United States Government has created the Atlantic Ocean's first marine national monument, saying that the new protected area was a needed response to risky climate changes, ocean dead zones and unsustainable fishing practices.
 
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. -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 - 2016 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER