Welcome   Sponsored By
Subscribe | Register | Advertise | Newsletter | About us | Contact us
   


A healthy farm-raised Atlantic salmon pictured above a growth-stunted. (Photo: Ole Folkedal)

New study states farmed salmon can feel blue

Click on the flag for more information about Sweden SWEDEN
Saturday, May 28, 2016, 00:50 (GMT + 9)

New research suggests that growth-stunted salmon that float lifelessly at the surface of a pond are severely depressed.

The study findings have revealed that these dejected salmon -- called drop outs because they appear to have given up -- show brain chemistry and symptoms of depression that are analogous to those documented in other animals.

"I would not go so far as to say they are committing suicide, but physiologically speaking, they are on the edge of what they can tolerate, and since they remain in this environment, they end up dying because of their condition," lead study author Marco Vindas, a biologist at the University of Gothenburg, told Discovery News.

Scientists measured significantly higher levels of cortisol, a stress-response hormone, in the drop out salmon. Cortisol is regulated by the serotonergic system, as is serotonin, a neurotransmitter key to the regulation of sleep, respiration and mood.

The serotonergic systems of drop-out fish in salmon farms were overactive, or overstimulated, and defunct. The salmon's observed physiological conditions recall the growing body of evidence of the link between serotonergic system problems and depression-like syndromes in humans.

Humans facing poverty and other socioeconomic hardships are more likely to be diagnosed with depression and mental illness. It appears unnatural and stressful environments can have a similar influence on farm-raised fish.

Farm-raised salmon and other fish live in crowded tanks where they must tolerate the presence of aggressive fish and battle for food. They must also endure sporadic changes in lighting, water depth, currents and more.

"Farmed fish live in a very stressful environment, since the conditions in aquaculture farms are extremely different from what they have evolved to cope with in the wild," Vindas said.

Researchers hope their work will help scientists and aquaculture experts come up with ways to give farm-raised fish a higher quality of life while producing better yields. The research could also help scientists better understand the role of brain chemistry in depression.

Source: Brooks Hays / UP
 
editorial@seafood.media
www.seafood.media


 Print


Click to know how to advertise in FIS
MORE NEWS
Russian Federation
Mar 29, 01:00 (GMT + 9):
Will the Russian Far East be the country with the most snow crabs in 2025?
Viet Nam
Mar 29, 01:00 (GMT + 9):
Shrimp exports from Ecuador are facing many challenges
Australia
Mar 28, 21:10 (GMT + 9):
IN BRIEF - At WTO, Australia seeks details on India's fisheries plan
Croatia
Mar 28, 21:00 (GMT + 9):
IN BRIEF - Cromaris business results in 2023
United States
Mar 28, 07:20 (GMT + 9):
AQUA Cultured Foods Partners with Ginkgo Bioworks to Optimize Alt-Seafood Production
United States
Mar 28, 07:00 (GMT + 9):
Seafood Expo Global Announced Finalists of the 2024 Seafood Excellence Global Awards
Norway
Mar 28, 07:00 (GMT + 9):
Borealis and AKVA group launch groundbreaking Polarcirkel™ workboat hull crafted from renewable feedstock-based plastic
Viet Nam
Mar 28, 07:00 (GMT + 9):
China & HK imported 75 million USD of Vietnamese pangasius
Japan
Mar 28, 07:00 (GMT + 9):
The first fly meal-based food in Japan developed by Nichimo
United States
Mar 28, 06:50 (GMT + 9):
Southern Shrimp Alliance Praises Congressional Representatives for Demanding Action on Indian Shrimp
Norway
Mar 28, 06:50 (GMT + 9):
Fish Pool Salmon Price Status Report for week 13
Norway
Mar 28, 06:40 (GMT + 9):
Statistics │ Export by destination │ Atlantic salmon: semi-dress/fillet fresh │ by country │ 2022-23-24
Papua New Guinea
Mar 28, 04:00 (GMT + 9):
IN BRIEF - Thrilling progress in PNG fisheries sector
Norway
Mar 28, 01:00 (GMT + 9):
IN BRIEF - Marine protected areas safeguard more than ecology – they bring economic benefits to fisheries and tourism
South Africa
Mar 28, 01:00 (GMT + 9):
IN BRIEF - Forestry, Fisheries and the Environment on Biodiversity Economy and Investment Indaba



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Clipfish challenges in Brazil: Port bureaucracy stops millions worth
Brazil More and more clipfish containers are being stopped in Brazilian ports. - Complicated regulations make market access challenging, to say the least, say Norwegian exporters who risk large losses. Bra...
Catches in the Sea of Okhotsk and Bering Sea
Russia Fed. Situational update as of 03/24/2024 Source: Stockfile FIS Sea of Okhotsk (pollock) According to OSM data in the Sea of Okhotsk, pollock catch (industrial and coastal fisheries) as of March 24, 20...
Productive Development of the Fishing Activity
Peru Fishing Sector Bulletin - January 2024 The landing of hydrobiological resources registered a negative interannual variation of 62.7%, as a result of the lower landing of fishing resources for indirec...
NGO Sues UK Government Over International Fishing Quotas
United Kingdom Blue Marine Foundation, a charity dedicated to restoring the ocean to health, has launched legal proceedings over the government’s decision to set fishing opportunities, for more than half UK st...
 

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. - Grupo Pereira Headquarters
Costa Meeresspezialitäten GmbH & Co. KG
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 - 2024 Seafood Media Group Ltd.| All Rights Reserved.   DISCLAIMER