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


Triploid oyster mortality is reduced to 5 pc. (Photo: Edison Barbieri, pesca.sp.gov.br)

Triploid oysters, a solution to summer mortality

Click on the flag for more information about Brazil BRAZIL
Wednesday, February 08, 2012, 04:40 (GMT + 9)

In the state of Santa Catarina triploid oysters (with three sets of chromosomes) are being introduced to reduce problems that occur in the summer when the sea temperature increases, up to 30 degrees Celsius, causing mortality of many molluscs.

The Federal University of Santa Catarina has started oyster farming 20 years ago, after observing the good adaptability of this mollusc to Santa Catarina’s sea conditions.

The State’s marine farms account for almost all domestic production of oysters. The last harvest reached 2,000 tonnes, equivalent to about 24 million of specimens.

According to experts, the bays of Florianopolis are some of the best places in the world to produce oysters because the water is rich in nutrients and does not exceed an average of 18-22 degrees Celsius, an ideal temperature to ensure the growth of the mollusc.

These features allow a short production cycle, six to seven months, while in other countries such as China, France and Chile, it takes four years.

Fábio Brognoli, president of the Federation of Aquaculture of Santa Catarina (FEAq) explains that when sea water temperature rises, oysters enter a reproductive process, which makes them loose a loss of energy.

"This also increases the mortality rate of the specimens, with a survival of only 40 per cent of those in the water", he added.

The so-called summer mortality is a major puzzle for producers, who loose 6 out of 10 cultivated oysters.

According to experts, the solution lies in biotechnology, Globo Rural reported.

A company from Florianopolis specialized in aquaculture was authorized by the Ministry of Fisheries to import and use Chilean oysters sperm to produce a more resistant variety.

Fertilization in the lab generates triploid oysters, which are much more resistant to warm water, highlights aquaculture specialist Vinícius Volpato.

"Mortality, amounting to an average of 50 per cent in Santa Catarina, falls to 5 per cent, enabling production in the states of the Northeast of Brazil. They produce much more meat and are sterile. Being sterile and not reproducing themselves, they do not become an invasive species", the expert highlighted.

Santa Catarina's lab already produces 10 million oyster seed, 25 per cent of what local producers need.

"It's a sector bet. People want to reconcile the survival rate, quality of meat and differentiated growth rate we have in relation to the world”, Brognoli emphasized.

By Analia Murias
[email protected]
www.fis.com

 


 Print


Click to know how to advertise in FIS
MORE NEWS
Malaysia
Oct 20, 03:20 (GMT + 9):
Sabah stops mangrove exploitation for shrimp farming
Kenya
Oct 20, 03:00 (GMT + 9):
IN BRIEF - Fishermen welcome import ban, call for modern gear
United States
Oct 20, 03:00 (GMT + 9):
IN BRIEF - UMaine team gets help in battle with salmon-ruining lice
United Kingdom
Oct 20, 03:00 (GMT + 9):
IN BRIEF - With sales at GBP 150m a year fish are good for the economy –and dinner table
Norway
Oct 20, 03:00 (GMT + 9):
IN BRIEF - Marine Harvest ASA: Issuance of shares through partial conversion of bond and registration of share capital increase
Peru
Oct 20, 02:20 (GMT + 9):
Over 2,200 artisanal vessels registered for the formalization process
United States
Oct 20, 02:00 (GMT + 9):
StarKist Co. pleads guilty for canned tuna price fixing
Ghana
Oct 20, 01:20 (GMT + 9):
Tilapia sold in Asutsuare is safe, states Ministry of Fisheries
United Kingdom
Oct 20, 00:10 (GMT + 9):
New study mitigates concerns over imported farmed shrimp
Spain
Oct 19, 23:50 (GMT + 9):
Galician fleet returns from the Falklands after very good squid harvest
European Union
Oct 19, 22:50 (GMT + 9):
EU and Korea join efforts to fight against IUU fishing
Ecuador
Oct 19, 22:10 (GMT + 9):
Shrimp sector will exceed 2017 exports, but for a similar value
Chile
Oct 19, 21:20 (GMT + 9):
Supreme Court confirms sanction to seaweed export plant
Thailand
Oct 19, 04:40 (GMT + 9):
IN BRIEF - Joining forces for fisheries: 300+ delegates to gather for 3rd World Small-Scale Fisheries Congress
European Union
Oct 19, 04:00 (GMT + 9):
IN BRIEF - Study challenges concerns around imported farmed shrimp



Lenguaje
FEATURED EVENTS
  
TOP STORIES
IFFO’s Annual Conference features high level panel and the EU commission
Italy IFFO’s 58th Annual Conference was opened by IFFO’s President Eduardo Goycoolea who declared that this IFFO conference will challenge and answer the tough questions often facing the industr...
EU renews fishing partnership agreement with Cape Verde
European Union The EU and Cape Verde have agreed to renew the current Sustainable Fishing Partnership Agreement protocol, which expires at the end of the year.
Ecuadorian FIP accepted onto the IFFO RS Improver Programme
United Kingdom Ecuador small pelagics Fishery Improvement Project has successfully met the criteria for acceptance on to the IFFO RS Improver Programme, IFFO RS reported.
Illegal bluefin tuna trade ring dismantled
Spain The Civil Guard has dismantled a ring that in Spain traded tuna that had been illegally fished in other countries and that, in addition, sometimes had health irregularities.
 
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