Welcome to FIS   Sponsored By
United States
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

editorial@fis.com
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
United States
Dec 19, 04:00 (GMT + 9):
Arctic warming poses new challenges to fishing
Argentina
Dec 19, 03:40 (GMT + 9):
Extended catch for whitemouth croaker in area shared with Uruguay
Canada
Dec 19, 03:00 (GMT + 9):
Cooke’s expansion plans delayed in Nova Scotia
Australia
Dec 19, 02:40 (GMT + 9):
IN BRIEF - One of world's most invasive fish detected in New South Wales for first time
United States
Dec 19, 02:40 (GMT + 9):
IN BRIEF - Shrimp season to close in some parts of the state
Viet Nam
Dec 19, 02:40 (GMT + 9):
IN BRIEF - Seafood exports in 2014 may reach nearly USD 8 billion
United Kingdom
Dec 19, 02:40 (GMT + 9):
IN BRIEF - Iglo Group to roll out MSC logo on all wild fish lines
Brazil
Dec 19, 02:10 (GMT + 9):
Mato Grosso leads the Brazilian aquaculture production
France
Dec 19, 01:50 (GMT + 9):
IN BRIEF - Corporate governance changes at SAPMER
Viet Nam
Dec 19, 01:50 (GMT + 9):
IN BRIEF - South Korea FTA signed: seafood enjoys benefits
Philippines
Dec 19, 01:50 (GMT + 9):
IN BRIEF - PH shrimp trade good, but laggard in Asia
Netherlands
Dec 19, 01:20 (GMT + 9):
ASC to develop one core fish farm standard
Spain
Dec 18, 23:50 (GMT + 9):
EUR 800,000 granted to fleet operating in Mauritania
Norway
Dec 18, 23:30 (GMT + 9):
Healthier salmon through exercise and better sorting
United Kingdom
Dec 18, 23:00 (GMT + 9):
EU deal will mean an additional GBP 10 million for Scottish fleet



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Norwegian fish intake offers no concerning health risks
Norway Fish consumption benefits clearly outweigh its risks, since the current contaminant levels as well as that of other known undesirable substances offer no concern.
New labelling and biotoxin analysis worry mussel industry
Spain This Saturday the new rules of the EU allowing packaging mussel without explicit mention of the country of origin or the species used will come into force, which concerns raft fishermen and mussel farmers from Galicia.
Odisha seeks to increase seafood export to Portugal
India Odisha's Government proposes to boost seafood exports from this market to Portugal, given that this nation is one of those having the highest worldwide's per capita consumption of marine food.
Massachusetts AG calls for reauthorization of fisheries legistlation
United States In a letter sent on Friday to the Chair of the House Committee on Natural Resources, Attorney General of Massachusetts stated her strong support of the reauthorization of the Magnuson-Stevens Act.
 
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 (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Pescanova, S.A. - Group Headquarters
Sea Harvest Corporation (PTY) Ltd.
I&J - Irvin & Johnson Limited
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 ehf - 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-
Grupo Calvo - Luis Calvo Sanz, S.A. (Group 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 - 2014 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER