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


Blue mussels may help control sea lice in salmon farms, according to a study by UMaine. (Photo: Stock File/FIS)

UMaine researchers make key discovery on lice infestation

Click on the flag for more information about United States UNITED STATES
Friday, April 29, 2011, 04:10 (GMT + 9)

University of Maine researchers have published a paper in which they demonstrate that the blue mussel can eat larvae of the sea louse, a parasitic pest that has recently made a comeback on fish farms, decimating populations of farmed finfish.

The findings were published recently in the journal Aquaculture and have implications for the farmed salmon industry in Maine. If further analysis in the field holds up, the use of mussels on salmon farms could be another disease management strategy for reducing the infectious pressure of sea lice in a finfish farm.

Postdoctoral researcher Sally Molloy, a microbiologist in UMaine’s School of Marine Sciences, made the discovery last summer along with graduate student Michael Pietrak. Ian Bricknell, the Libra Professor of Aquaculture Biology and director of UMaine’s Aquaculture Research Institute, and Debbie Bouchard, manager of the Maine Aquatic Animal Health Laboratory at UMaine, provided research support.

The paper also has implications for the development in Maine of a concept called integrated multi-trophic aquaculture (IMTA), an alternative approach to the standard mono-culture aquaculture. IMTA is believed to reduce the environmental impacts of commercial aquaculture systems by combining the cultivation of fed species, such as salmon, with extractive species, such as mussels.

The sea louse, which feeds on the skin and tissue of its host, has a life cycle consisting of 10 stages. Most research to eradicate sea lice infestations has focused on the stages of the louse when it has already infected its host. Farmers of finfish such as salmon and trout had for the last 10 years used a drug called SLICE against the louse, but the parasite has shown resistance to the drug.

The UMaine research focuses on eradicating the sea louse in its larval stage.

To conduct the experiment, the researchers collected sea lice egg strings from an infected commercial salmon farm in Maine. The eggs hatched and were reared to the copepodid stage. Meanwhile, the team obtained mussels from a local commercial mussel farmer and placed the mussels in a system with artificial seawater.

The mussels were exposed to the sea lice copepods for either 30 or 60 minutes, after which time the contents of the mussels’ stomachs were removed and DNA analysis was performed. The analysis determined the mussels had ingested the sea lice copepodids.

The UMaine team will continue its research later this year, taking its work out of the laboratory and into the field. Although the date and exact location have not yet been determined, the researchers will insert a mussel raft into the waters of a salmon farm on the Maine coast to find out if their results from last summer hold up on a larger scale. The populations of mussels, salmon and sea lice will be monitored for several years to determine what effect they have on each other.

The farm, with its combination of species, will be the first of its kind in Maine.

Should the mussel raft prove effective against sea lice infestations in salmon farms, the IMTA technique could be used on a wider scale in combination with other methods, including drugs known as chemotherapeutics.

Source: UMaine

[email protected]
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
Germany
Jun 24, 00:00 (GMT + 9):
IN BRIEF - Sticklebacks infected with parasites influence behavior of healthy fish
United States
Jun 24, 00:00 (GMT + 9):
IN BRIEF - Fish wars loom as climate change pushes lobster, cod, and other species north
United States
Jun 24, 00:00 (GMT + 9):
IN BRIEF - Unlikely advocates: Chefs call on Congress to defend sustainable U.S. fisheries
Iceland
Jun 24, 00:00 (GMT + 9):
IN BRIEF - HB Grandi: Changes in management from 1st of October 2018
Norway
Jun 24, 00:00 (GMT + 9):
IN BRIEF - Marine Harvest : Northern Harvest update: No-Action Letter from the Canadian Competition Bureau
South Korea
Jun 23, 03:00 (GMT + 9):
Bluefin tuna farmed in South Korea to reach the market soon
Singapore
Jun 23, 02:50 (GMT + 9):
Aquatech start-up raises USD 8.2 million for research and development
South Africa
Jun 23, 01:50 (GMT + 9):
Green light given to proposed aquaculture project in Saldanha Bay
India
Jun 23, 01:00 (GMT + 9):
New aquaculture complex will help black tiger shrimp industry to bounce back
United Kingdom
Jun 23, 00:50 (GMT + 9):
Young’s Seafood to increase sales to US after deal with Albertsons
United Kingdom
Jun 22, 23:10 (GMT + 9):
Young's Seafood fails to retain Asda significant contract
European Union
Jun 22, 22:50 (GMT + 9):
Spanish tuna fleet offers EC to use responsible fishing standard
United States
Jun 22, 22:30 (GMT + 9):
Maryland to grant USD 375,000 to promote blue crab industry
France
Jun 22, 21:40 (GMT + 9):
Stef expands logistics operations through Express Maree purchase
Canada
Jun 22, 19:40 (GMT + 9):
IN BRIEF - Marine Harvest | Northern Harvest update: No-Action Letter from the Canadian Competition Bureau



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Canary Islands one-by-one tuna fishermen become part of the IPNLF Member network
United Kingdom LONDON - Organización de Productores de Túnidos y Pesca Fresca (Optuna No 42), the non-profit tuna producer organisation based on the island of Lanzarote, in the Canary Islands has becom...
Fishermen affected by hurricanes and fishing disasters to be granted USD 200 million
United States The fishermen that had been affected by hurricanes Harvey, Irma, and Maria in 2017 as well as the firms and communities depending on them will be granted USD 200 million in disaster funding appropriated by Congress.
A quarter of seafood sold in Vancouver is mislabelled
Canada A University of British Columbia study determined that 25 per cent of the tested seafood collected in Metro Vancouver grocery stores, restaurants and sushi bars was not what their labels indicated.
Young’s Seafood to increase sales to US after deal with Albertsons
United Kingdom Six months after launching its brand in the US, Young’s Seafood Limited is announcing further growth with increased distribution, new products and extensions to the existing lines.
 
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
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