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


Salmon farm. (Photo: Stock File)

New procedure allows faster detection of environmental impacts from salmon farms

Click on the flag for more information about Germany GERMANY
Thursday, December 14, 2017, 23:50 (GMT + 9)

In order to meet the demands for salmon, many salmon farms have developed along the coasts of Scandinavia and Scotland. These operations are governed by strict environmental regulations. Farms are required to determine how their fish production is affecting the marine benthic ecosystem. Therefore, they analyse the presence of so-called bioindicator organisms such as crustaceans and worms on the sea floor. This process is time-consuming and expensive.

Researchers at the University of Kaiserslautern together with colleagues from the University of Geneva are developing faster and more efficient methods. They utilize the DNA from microorganisms to characterise changes more precisely that was previously possible. Their studies have been published in the renowned journals Ecological Indicators and Marine Pollution Bulletin.

At more than 1.2 million tonnes annually, Norway is one of the largest salmon producers in the world. These fish are cultivated in large cages off the coast for approximately two years. The feed residues and fish excretions from these operations sink down to the sea floor and may affect the benthic ecosystem: bacteria break down these organic substances in a process that consumes oxygen. As a result, oxygen levels can drop low enough that most larger benthic organisms such as many worms, crustaceans or sea urchins are not able to survive these low-oxygen conditions.

For this reason, environmental authorities have imposed strict regulations for salmon farms. "Water exchange from ocean currents must be sufficient to supply the fish with oxygen and carry away as much as possible of the organic waste," notes Professor Dr. Thorsten Stoeck, an ecologist at the University of Kaiserslautern. "Moreover, environmental regulations allow only significant environmental impacts immediately beneath the fish cages. Within very short distance from the farm the environment needs to recover."

In order to test how the benthic ecosystem is impacted by farming activities, farmers must take samples from the ocean bottom. "The organisms living on the sea floor are indicators of ecosystem health," adds Dr. Stoeck. However, the process of species identification requires experts in taxonomy and is expensive and very time-consuming; it may take close to six months before results are in: too long for measures to be implemented if the ecosystem is severely stressed.

Stoeck's research team in collaboration with colleagues in Switerland (University of Geneva) is currently developing a simpler, more rapid and more cost-efficient method in their laboratories on the Kaiserslautern campus. The researchers are gathering samples from farmers and isolating microorganisms such as ciliates and bacteria. The scientists use the DNA from these microbes for the procedure. "Their genetic material is like a fingerprint; it is unique to each individual," says the ecologist. "Results are available within just a week." These tiny animals make it possible to draw more accurate conclusions about the extent of pollution than conventional methods. "Many larger organisms are not able to survive low-oxygen conditions," notes Stoeck. "Microbes are typically more resistant. Many are able to tolerate different degrees of pollution and contaminants and can adapt more rapidly to changing conditions."

The goal of the project is to create a database with the DNA fingerprints of a wide range of microorganisms. "We can create a system of DNA barcodes, analogous to the barcodes used for food products at the grocery store," continues Stoeck, whose team is collecting sediment samples from fish farms all over the globe. "These barcodes will allow the farmers to quickly identify the state of health of the ecosystem in vicinity of the fish farms."

In the long term, for example, farmers may be able to use a DNA chip for an automated analysis of sediment samples directly on site. The collection of barcodes will give them up-to-date information about the condition of the ocean, allowing farmers to respond to problems more quickly. Current monitoring programs usually are looking only at environmental conditions prevailing before fish are placed in the cages and then at the peak of production.

Source: Technische Universität Kaiserslautern

[email protected]
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
Chile
Nov 14, 21:30 (GMT + 9):
SERNAPESCA modernization bill closer to becoming law
Indonesia
Nov 14, 03:00 (GMT + 9):
SFP, Conservation International, and UCSB release new best practices for aquaculture management guide
Viet Nam
Nov 14, 02:50 (GMT + 9):
Good prospects forecast for shrimp exports to the EU
Honduras
Nov 14, 02:40 (GMT + 9):
Mexico reopens its market to Honduran shrimp
Canada
Nov 14, 01:50 (GMT + 9):
Oceana accuses Govt of not meeting commitments to rebuild fisheries
Spain
Nov 14, 01:30 (GMT + 9):
Galicia opens spider crab and brown crab season in two provinces
United States
Nov 14, 00:30 (GMT + 9):
AquaBounty signs deal with R&D firm to produce sterile fish
Spain
Nov 13, 23:50 (GMT + 9):
Govt hopes quota reductions proposed by EC will be modified
Norway
Nov 13, 23:50 (GMT + 9):
Marine Harvest launches brand strategy and name change
Mexico
Nov 13, 23:10 (GMT + 9):
Sinaloa farmers receive USD 3.3 million in aid for shrimp larvae purchase
United Kingdom
Nov 13, 23:00 (GMT + 9):
Scottish Sea Farms to receive GBP 1.28m to support innovation projects
Argentina
Nov 13, 21:30 (GMT + 9):
First wreckfish spawning achieved in captivity
Kenya
Nov 13, 20:20 (GMT + 9):
IN BRIEF - Cage aquaculture offers fresh hope to marine fish farmers
Canada
Nov 13, 20:20 (GMT + 9):
IN BRIEF - Fish's brain size influenced by habitat
United States
Nov 13, 20:00 (GMT + 9):
IN BRIEF - U.S. Shrimp industry targets farm-raised imports during World Antibiotic Awareness Week



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Echebastar Indian Ocean purse seine skipjack fishery achieves MSC certification
United Kingdom The Echebastar Indian Ocean purse seine skipjack tuna fishery has achieved certification to the MSC Fisheries Standard.
Growing amount of infected herring landings seem worrying
Iceland A considerable amount of the herring catch landed in recent days was found to be infected and almost all of it will be incinerated.
Indonesian fishing vessel apprehended due to alleged illegal fishing activities
Australia An Indonesian fishing vessel and its crew of five men were apprehended off the coast of Western Australia, suspected of illegally fishing in Australian waters.
Piriou delivers new freezer longliner for toothfish capture
France Vietnamese shipyard Chantiers Piriou SARL has just delivered French fishing company Comata a new 62.8 m freezer longliner dedicated to toothfish fishing in the French southern seas.
 
Maruha Nichiro Corporation
Nichirei Corporation - Headquarters
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
Sea Harvest Corporation (PTY) Ltd. - Group Headquarters
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.
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. - Headquarters
Friosur S.A. - Headquarters
Cargill, Incorporated - Global Headquarters
Benihana Inc.
Leardini Pescados Ltda
Mitsubishi Corporation Marine Products Depts. D.Team
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 -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 - 2018 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER