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
Indonesia
Jul 22, 03:20 (GMT + 9):
INPLF joins a global collaboration to research fishing communities
United States
Jul 22, 03:00 (GMT + 9):
IN BRIEF - Shellfish Harvest Suspended for Delaware Bay and Inland Rivers
United States
Jul 22, 03:00 (GMT + 9):
IN BRIEF - Oysters in Seattle Linked to Spike in Vibriosis Cases
Spain
Jul 22, 02:20 (GMT + 9):
Lanzarote and Fuerteventura are the Canary Islands with highest toxic microalgae concentration
Thailand
Jul 22, 02:20 (GMT + 9):
CPF reduces use fishmeal in shrimp feed
Canada
Jul 22, 02:00 (GMT + 9):
IN BRIEF - Shrinking shrimp catch sparks worry for one of Eastern Canada's most important fisheries
Canada
Jul 22, 00:20 (GMT + 9):
Snow crab fishery closes to protect right whales
Peru
Jul 22, 00:00 (GMT + 9):
Document highlights effectiveness in anchovy juvenile protection
Japan
Jul 21, 23:50 (GMT + 9):
Maruha Nichiro improves earnings aided by foreign gains
United Kingdom
Jul 21, 23:00 (GMT + 9):
IN BRIEF - IPNLF joins global partnership project to enhance research into global coastal communities
Canada
Jul 21, 22:30 (GMT + 9):
Court orders environment assessment of Grieg's aquaculture project
Worldwide
Jul 21, 22:00 (GMT + 9):
SAMS leads global project to ensure seaweed sustainability
Spain
Jul 21, 21:40 (GMT + 9):
AZTI publishes guide to minimize aquaculture by-products and waste
United States
Jul 21, 07:30 (GMT + 9):
IN BRIEF - The Fight for Healthy Fisheries Resurfaces in Congress
Norway
Jul 21, 07:30 (GMT + 9):
IN BRIEF - How do we assess the welfare of farmed salmon?



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Snow crab fishery closes to protect right whales
Canada Fisheries and Oceans Canada decided the closure of snow crab season in the Southern Gulf of St. Lawrence with the aim of protecting North Atlantic right whales from risks posed by the crustacean fishing gear in the area.
INPLF joins a global collaboration to research fishing communities
Indonesia A team of international partners and local stakeholders is to develop a project intended to help build long-term research capability for marine planning in East and Southeast Asia over the next four years and support local coastal communities.
NGO urges international entity to probe Hawaii's fleet labour conditions
United States Turtle Island Restoration Network requested the Inter-American Human Rights Commission to determine the responsibility of the United States for human rights violations against foreign workers in Hawaii's longline fishing fleet.
Bottom trawling environmental effects on the seabed quantified
United Kingdom An international collaboration of scientists that conducted a global meta-analysis of 70 comparative and experimental studies on the effects of bottom trawling were able to quantify the relationship between the reduction of seabed animals and penetration of the fishing equipment into the seabed.
 
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.
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.
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-
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
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 - 2017 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER