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
China
Apr 21, 05:00 (GMT + 9):
IN BRIEF - China signals a crack in the ice
China
Apr 21, 05:00 (GMT + 9):
IN BRIEF - Trident's new fishmeal plant to go online soon in Naknek
New Zealand
Apr 21, 05:00 (GMT + 9):
IN BRIEF - Sanford confirms closure of Chch mussel processing facility
Italy
Apr 21, 05:00 (GMT + 9):
IN BRIEF - Tuna fleet setting nets on dolphins not qualified for Friend of the Sea certification
Nigeria
Apr 21, 04:50 (GMT + 9):
IN BRIEF - How Pirate Attacks Cripple Fish Trawling Business in Nigeria
New Zealand
Apr 21, 04:40 (GMT + 9):
IN BRIEF - Endangered sturgeons, CITES labelling & seafood traceability
Australia
Apr 21, 04:40 (GMT + 9):
IN BRIEF - Cell Aquaculture completes acquisition of Haikou Project, to change name
Namibia
Apr 21, 04:40 (GMT + 9):
IN BRIEF - Aquaculture a Headache - Esau
New Zealand
Apr 21, 04:40 (GMT + 9):
IN BRIEF - Sea of dead fish clogs Olympic waterway
Japan
Apr 21, 04:30 (GMT + 9):
IN BRIEF - Japan Marine to build 10 vessels
Namibia
Apr 21, 04:30 (GMT + 9):
IN BRIEF - Fish exports rake in NAD 7 billion
Australia
Apr 21, 04:30 (GMT + 9):
IN BRIEF - Doctors warn of potentially high levels of mercury in Gippsland Lakes fish, urge further testing
India
Apr 21, 04:30 (GMT + 9):
IN BRIEF - A.P.-MPEDA pact soon for fish seed supply
United Kingdom
Apr 21, 03:30 (GMT + 9):
Nomad Holdings purchases Iglo Food for EUR 2.6 billion
Mexico
Apr 21, 03:00 (GMT + 9):
International certification could help curb red snapper overfishing



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Shipwrecked Russian ship off Gran Canaria accused of illegal fishing
Spain Shortly after the Russian-flagged fishing vessel Oleg Naydenov sank south of Gran Canaria after catching fire, allegations about its involvement in illegal fishing activities and revocation of its catch permits came into light.
Organic seafood standards could be set this year
United States The Agriculture Department is planning to propose the standards to allow the sale of US-raised organic fish and shellfish, which is expected to be available in as few as two years.
Alaska salmon processors considering rejoining MSC certification
United States Three years after leaving the Marine Stewardship Council certification programme, some Alaska salmon processors are planning to once more join it in an effort to face the current tough market.
CETMAR participates in project to improve EU fisheries and aquaculture
Spain Experts in the field of Fisheries Socioeconomics of CETMAR are collaborating on a project that aims at improving the economic sustainability and competitiveness of fisheries and aquaculture in the EU.
 
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