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


Researchers Turid Morkore (L) Anlaug Adland Hansen, Marit Rodbotten and Per Lea. (Photo: Kjell J. Merok, Nofima)

Stress lowers the quality of salmon

Click on the flag for more information about Norway NORWAY
Monday, February 20, 2012, 04:00 (GMT + 9)

Salmon that becomes stressed before slaughter has a shorter shelf life because the flesh suffers more bacterial growth and develops undesirable flavours and odours more quickly. The negative consequences of stress are greater for raw than for cooked salmon.

"There are a number of issues that influence how long fish stays fresh. In this study, we have concentrated on what effect stress just before slaughter has on the quality of the flesh", explains Research Scientist Anlaug Ådland Hansen of Nofima Mat, the Norwegian Institute of Food, Fisheries and Aquaculture Research.

The salmon was divided into three groups. The only difference was the length of the period of stress before slaughter. One group was handled as carefully as possible before slaughter, without crowding the fish in the cage before taking them out of the water.

The salmon in the second group were crowded together for 20 minutes before slaughter, while those in the third group were crowded for about 20 hours. Feed, fish size and other factors that can affect quality were constant for all the fish.

After slaughtering, the salmon were immediately filleted, cut into portion sizes, packed in a modified atmosphere (MAP) and stored at 0.3°C.

Regular quality analyses were made over the course of 22 days. It was found that both bacterial growth and undesirable sensory properties increased most rapidly in the salmon that had been subjected to the longest stress.

"Sensory analysis showed that undesirable odours especially became more obvious as a result of longer stress. We also found that the differences in quality became more marked when the fish was raw", says Researcher and Sensory Scientist Marit Rødbotten.

An increasing proportion of Norwegian farmed salmon is filleted within a few hours of slaughter – before rigor mortis occurs. Early filleting means more jobs in Norway and keeps the fish fresher and firmer when it reaches the customer.

It is known that slaughter stress brings forward the time at which rigor mortis begins. Filleting salmon during rigor mortis is not recommended, which means that the filleting window is shorter for salmon that are stressed before slaughter. It is also important for fish welfare to handle the fish as carefully as possible.

"In our study, both the shorter and longer period of crowding accelerated the onset of rigor mortis, but it was the long-term crowding that really gave quality problems, shortening shelf life by three days. Crowding the fish had no negative consequences for fillet colour, firmness or drip loss during storage", says Research Scientist Turid Mørkøre, who was responsible for the study carried out at Nofima's marine facility at Averøya.
 
This work has been described in a scientific article that is being published in the Journal of Food Science. The article is entitled “The effect of crowding stress on bacterial growth and sensory properties of chilled Atlantic salmon fillets.”

The authors of the article are Anlaug Ådland Hansen, Marit Rødbotten, Thomas Eie, Per Lea, Knut Rudi and Turid Mørkøre.

Source: Nofima

[email protected]
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
Morocco
Dec 4, 19:00 (GMT + 9):
Government Approves Morocco-Russia Fisheries Agreement
Japan
Dec 4, 18:30 (GMT + 9):
New fisheries law enters into force and Japanese specialists discuss its future
Japan
Dec 4, 15:00 (GMT + 9):
Statistics │ Import │Bottomfish from USA and Russia (2018/19/20)
China
Dec 4, 15:00 (GMT + 9):
Statistics │ Seafood Import and export │ Oct-2020
China
Dec 4, 09:00 (GMT + 9):
China refutes U.S. allegations on fishing practices
Argentina
Dec 4, 08:00 (GMT + 9):
The South Atlantic requires urgent action and simulation conspires against it
Namibia
Dec 4, 07:00 (GMT + 9):
Tunacor takes in retrenched fishermen
Chile
Dec 4, 00:50 (GMT + 9):
Other Media | aqua.cl: First shipment of fishmeal was processed via Siscomex bound for China
European Union
Dec 4, 00:50 (GMT + 9):
Other Media | iPac.acuicultura: Council and Parliament reach an agreement on the European Fund for Maritime Fisheries and Aquaculture 2021-2027
United States
Dec 4, 00:40 (GMT + 9):
Other Media | SeafoodSource: Reaction to COVID-19 relief bill mixed as restaurants close doors
Norway
Dec 4, 00:40 (GMT + 9):
Other Media | Fish Farmer: Salmon prices stall again
United States
Dec 4, 00:30 (GMT + 9):
IN BRIEF | New dates announced for Seafood Expo North America/Seafood processing North America
Spain
Dec 4, 00:20 (GMT + 9):
Other Media | FiskerForum: Freezer Trawler Beyond Salvaging After Fire On Board
Japan
Dec 4, 00:00 (GMT + 9):
Tarako | Salted Alaska pollock roe inventories | 8 main cities | 2016-17-18-19-20
Japan
Dec 4, 00:00 (GMT + 9):
Import volumes │ Stock / Sales │ Frozen octopus | 2019-20



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Ongoing with the renewal of the green fleet
Norway Norway is one of the European countries that has been electrified the most so far. Not only is its car fleet dominated by electric vehicles, which account for 60% of the market share. Also its waters....
National fisheries to compete with Chinese jiggers for squid in the eastern Pacific
Ecuador Ecuador's government plans to allow the country's artisanal and industrial fleet to fish for giant squid in international waters of the Eastern Pacific, where it will have to compete with the Chinese ...
Nigeria imports US$ 280M mackerel fish
Nigeria Despite import restriction, importation of chilled and frozen mackerel has reached N128.8billion ($280million) or 40 per cent of the total annual $700million fish imports into Nigeria in one year. ...
U.K. send Brexit warnings
United Kingdom The U.K. relies on imports for the fish it eats — cod and haddock — but its fishermen depend on exports of other varieties for their livelihood The U.K. and the European Union warned each other ...
 
Maruha Nichiro Corporation
Nichirei Corporation - Headquarters
Pesquera El Golfo S.A.
Ventisqueros - Productos del Mar Ventisqueros S.A
Wärtsilä Corporation - Wartsila Group Headquarters
ITOCHU Corporation - Headquarters
BAADER - Nordischer Maschinenbau Rud. Baader GmbH+Co.KG (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Sea Harvest Corporation (PTY) Ltd. - Group Headquarters
I&J - Irvin & Johnson Holding Company (Pty) Ltd.
AquaChile S.A. - Group Headquarters
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
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.
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
Brim ehf (formerly HB Grandi Ltd) - Headquarters
Hamburg Süd Group - (Headquearters)
Armadora Pereira S.A. - Group Headquarters
NOAA - National Oceanic and Atmospheric Administration (Headquarters)
Mowi ASA (formerly 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
CJ Corporation  - Group Headquarters
Greenpeace International - The Netherlands | Headquarters
David Suzuki Foundation
Fisheries and Oceans Canada -Communications Branch-
Mitsui & Co.,Ltd - Headquarters
NOREBO Group (former Ocean Trawlers Group)
Natori Co., Ltd.
Carrefour Supermarket - Headquarters
FedEx Corporation - Headquarters
Cooke Inc. - Group Headquarters
AKBM - Aker BioMarine ASA
Seafood Choices Alliance -Headquarter-
Austevoll Seafood ASA
Walmart | Wal-Mart Stores, Inc. (Supermarket) - Headquarters
New Japan Radio Co.Ltd (JRC) -Head Office-
Gulfstream JSC
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
SeaChoice
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2020 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER