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


Thomas Larsson developed a PhD project stressing new gene technology methods. (Photo: Nofima)

Salmon fillets can be made firmer

Click on the flag for more information about Norway NORWAY
Monday, November 19, 2012, 22:30 (GMT + 9)

The firmness of salmon fillets is something the consumer perceives as a characteristic of quality and is an important factor for processing to be considered by the producer. By making use of new gene technology methods in quality research, in his PhD project Thomas Larsson points to the fact that the key to a firmer fillet lies in efficient metabolism of nutrients in the cells, and that this is determined by the genes in the fish.

“In order to find the biological difference in salmon with soft and firm fillet, we have used a method called microarray. This is a method used to study if genes are turned on or off in salmon with varying firmness in their musculature,” says Larsson.

“Gene analyses tells us what happens in the fish at a molecular level and indicates the cause of undesirable softness in farmed salmon fillets. By studying thousands of genes simultaneously, the method functions as an efficient screening tool to point to key factors that influence the firmness.”

The microarray used here is specific for salmon and was developed at Nofima Mat, the Norwegian Institute of Food, Fisheries and Aquaculture Research, by Aleksei Krasnov. This is a suitable method for studying regulation of genes in salmon.

This new approach regarding the use of method in Larsson’s work made it possible for the first time to map the biological causes of variation in the firmness of salmon fillet.

Efficient conversion of nutrients occurs in the cellular energy plants, the mitochondria (aerobic metabolism). The gene analyses showed that salmon with firm fillet had more aerobic metabolism, by using fat as fuel, than salmon with softer fillets. Efficient mitochondria were a requirement for the formation of firmer salmon fillets.

The knowledge from the gene analyses was used as a basis to design salmon feed that stimulates formation of firmer fillets. A feeding trial involved salmon feed with extra amino acid supplements (glutamate) being fed to one group of salmon, while another group received normal feed.

The salmon that received the feed containing extra glutamate had stimulated aerobic metabolism, which resulted in a firmer fillet.
 
Positive health benefits were also observed. Sick salmon are not in a position to fulfil the biological requirements to form normal firm muscle, and these fish instead developed abnormally hard muscle.

editorial@fis.com
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
United States
Feb 9, 05:00 (GMT + 9):
IN BRIEF - FDA: Giant Eagle Voluntarily Recalls Japanese Hand Breaded Cod Fillets
United States
Feb 9, 05:00 (GMT + 9):
IN BRIEF - Bristol Bay Waypoints: February 8, 2016 February Board Meeting Canceled
India
Feb 9, 02:40 (GMT + 9):
Fisheries specialists recommend a greater role for women in aquaculture
United States
Feb 9, 02:20 (GMT + 9):
IN BRIEF - Oyster aquaculture on the rise
United Kingdom
Feb 9, 02:20 (GMT + 9):
IN BRIEF - Isles fisheries groups awarded support and development funds in a UK first
Panama
Feb 9, 02:10 (GMT + 9):
Cooperation agreement seeks to strengthen fisheries research
Myanmar
Feb 9, 02:00 (GMT + 9):
IN BRIEF - Report highlights Myanmar’s aquaculture potential
Angola
Feb 9, 02:00 (GMT + 9):
IN BRIEF - Fisheries Minister Inaugurates Fishmeal Factory
Marshall Islands
Feb 9, 02:00 (GMT + 9):
IN BRIEF - Fisheries group chief: US fishing treaty a ‘distraction’
Fiji
Feb 9, 01:40 (GMT + 9):
New multi-species hatchery to boost aquaculture
Australia
Feb 9, 01:00 (GMT + 9):
John West to deliver more than 100m ecolabelled tuna cans
United States
Feb 9, 00:00 (GMT + 9):
IN BRIEF - Mercury, DDT and other contaminants in fish are at a four-decade low
United States
Feb 9, 00:00 (GMT + 9):
IN BRIEF - Intersex Fish Found In Protected Waters
Bangladesh
Feb 9, 00:00 (GMT + 9):
IN BRIEF - Govt plans to ban catch Hilsa fish for 22 days
Namibia
Feb 9, 00:00 (GMT + 9):
IN BRIEF - Namibia benefits from Cuban aquaculture experts



Lenguaje
FEATURED EVENTS
  
TOP STORIES
NOAA proposes new traceability plan to combat IUU fishing
United States NOAA announced a proposal to implement a traceability plan for fishery products, aimed at combating illegal, unreported and unregulated fishing and to prevent fraudulent trade.
Online platform opens up new opportunities for New Zealand's seafood in China
New Zealand New Zealand seafood retailers may now reach new consumers based in China’s rural villages through Alibaba Group’s B2C e-commerce platform, Tmall.com.
Significant impact of climate change on Northeast fisheries, study foresees
Worldwide NOAA scientists have released the first multispecies assessment of how vulnerable U.S. marine fish and invertebrate species are to the effects of climate change.
Switzerland launches USD 2m-project to boost Egyptian aquaculture
Egypt The Embassy of Switzerland’s Office for International Cooperation, in collaboration with WorldFish and CARE International, has launched a project aimed at boosting production of inexpensive, nutritious and safe fish from sustainable aquaculture systems in Egypt.
 
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