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


The development of transgenic rainbow trout may revolutionise aquaculture. (Photo: University of Rhode Island )

Transgenic rainbow trout may revolutionize aquaculture

Click on the flag for more information about United States UNITED STATES
Friday, March 12, 2010, 15:00 (GMT + 9)

A University of Rhode Island scientist has developed transgenic rainbow trout with enhanced muscle growth, which has yielded fish with what have been described as six-pack abs and muscular shoulders that could revolutionise the commercial aquaculture industry.

Terry Bradley, a professor of fisheries and aquaculture, said that his 10-year research into the inhibition of myostatin, a protein that slows muscle growth, has obtained "stunning results" in the last two years, with trout growing 15 to 20 per cent more muscle mass than standard fish, according to the University of Rhode Island (URI).

"Belgian blue cattle have a natural mutation in myostatin causing a 20 to 25 per cent increase in muscle mass, and mice overexpressing myostatin exhibit a two-fold increase in skeletal muscle mass," said Bradley.

Bradley and his team spent 500 hours injecting 20,000 rainbow trout eggs with DNA types designed to inhibit myostatin. Of the eggs that hatched, 300 carried the gene that led to increased muscle growth. After two years, most fish had the "six-pack ab" effect, even though fish lack standard abdominal muscles. They also have increased musculature throughout.

Studies are under way to determine whether the fish also grow at a faster.

">

According to the professor, who also studies salmon, flounder and tuna, the number of muscle fibres in mammals is limited after birth, but in fish, muscle fibre numbers increase throughout their lifespan. Since inhibition of myostatin increases the numbers of muscle fibres, it was not known whether inhibiting myostatin would cause an increase in muscle growth in fish.

"The results have significant implications for commercial aquaculture and provide completely novel information on the mechanisms of fish growth. The results also allow for comparisons between the mechanisms of growth of muscle in mammals versus fish, and it could shed light on muscle wasting diseases in humans," Bradley said.

Some 500,000 metric tonnes of rainbow trout are raised every year in aquaculture facilities across the United States and Europe. In the US, some 1,000 trout farms produce around USD 80 million worth of trout annually.

Assuming Bradley's transgenic fish meet the regulations, it could provide a boost to the industry by enabling farmers to grow larger fish without increasing the amount of feed.

"One of the advantages of this approach is that the modified genes introduced into the fish use the same mechanism and cause the same type of effect that occurs naturally in Belgian blue cattle and other 'double muscled' animals.”

While the trout may look like bodybuilders, Bradley said that they exhibit normal behaviour. He will continue to study the fish in order to learn if the new gene affects other genes, and to determine if new practices will aid in the raising of the trout.

By Michel Loubet
editorial@fis.com
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
India
Aug 30, 03:10 (GMT + 9):
IN BRIEF - Banned pelagic trawling still prevalent in Kerala
United States
Aug 30, 03:00 (GMT + 9):
IN BRIEF - Alaska Crabbers Urge Obama to Impose Ban on Russian Crab Imports
United States
Aug 30, 03:00 (GMT + 9):
IN BRIEF - Warm waters divert sockeye salmon run to Canada instead of Washington
Canada
Aug 30, 03:00 (GMT + 9):
IN BRIEF - 'Walking fish' studied for clues about evolution of limbs
Australia
Aug 30, 03:00 (GMT + 9):
IN BRIEF - Black market fishing is killing off local stocks
United States
Aug 30, 03:00 (GMT + 9):
IN BRIEF - Commercial Fishing Winds Down In Lower Cook Inlet
Uganda
Aug 30, 03:00 (GMT + 9):
IN BRIEF - Masaka Factory Forced To Shut Over Lack Of Mature Fish
Russian Federation
Aug 30, 03:00 (GMT + 9):
IN BRIEF - Russian fish processors turn to domestic resource base
Spain
Aug 29, 23:50 (GMT + 9):
Galicia reopens some raft polygons and shellfish beds
European Union
Aug 29, 23:40 (GMT + 9):
Four-year fisheries protocol agreed with Cape Verde
European Union
Aug 29, 23:20 (GMT + 9):
Herring dispute with Faroe Islands 'is over', says Damanaki
United States
Aug 29, 23:10 (GMT + 9):
Louisiana shrimpers asked to report foreign tiger prawn
Peru
Aug 29, 23:00 (GMT + 9):
Hake reproductive ban starts
Argentina
Aug 29, 22:20 (GMT + 9):
Shrimp still leading seafood export volume growth
Norway
Aug 29, 21:40 (GMT + 9):
Salmon price status at week 35



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Conarpesa/Agropez authorized to remove abandoned crab traps
Argentina The Undersecretariat of Fisheries of the Ministry of Production of Santa Cruz authorized the firms Continental Armadores de Pesca SA and Agropez to withdraw the traps left by Yaganes SA in provincial waters.
Satellite localization and monitoring system rule modified
Mexico The Secretariat of Agriculture, Livestock, Rural Development, Fisheries and Food published the amendment draft to the Official Mexican Norm 062 for the use of the tracking system and satellite monitoring of fishing vessels.
Abundant sockeye return in Fraser River
Canada The migration of sockeye through marine and lower Fraser River assessment areas as well as past the Mission hydroacoustic site has increased over the past week.
High supply and low prices boost octopus fishing ban
Mauritania For three months octopus will not be allowed to be caught in Mauritanian waters, following the ban enacted by the Government of this country from 21 August.
 
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
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