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

Kindai University develops a method to find females faster, cutting production costs significantly

Japan's Kindai University changes sturgeons' sexes to female, could lead to cheaper caviar

Click on the flag for more information about Japan JAPAN
Tuesday, August 11, 2020, 15:00 (GMT + 9)

A new technique for sturgeon farming developed by Kindai University could greatly benefit Japan’s fledgling caviar industry.

When it comes to gastronomy, Japan has captured the world’s attention with signatures sake and sushi as well as its bold takes on global favorites like whiskey and caviar.

Wait, what? Caviar? Indeed, after several years on domestic gourmet menus, Japanese caviar had its global coming-out party in Hong Kong in 2017 and is now finding shelf space in Taiwan, Singapore, the United States and Canada.

A pair of young Siberian sturgeon are seen in this image provided by Kindai University.

Even with the eradication of black-market trades from illegal fisheries in the early part of this century, the cost of caviar – made from cured sturgeon eggs – remains an expensive delicacy, even though aquaculture has taken the reins of the global supply chain. This is mainly due to the inordinate amount of time it takes to determine which fish are male and which are female.

Sturgeon farms run up high costs by waiting until their fish are about three years old before opening a section of their stomachs to confirm the color and shape of their reproductive glands. The fish are then stitched back up and returned to their tanks, no worse for the wear.

But a new technique developed by Kindai University could pave the way for cheaper caviar production. In December 2019, the university announced that it had successfully turned a batch of artificially incubated sturgeon into females after administering female hormones.

“In Japan, sturgeon meat is almost never sold and the males, which cannot be used to produce caviar, only increase production costs at sturgeon farms,” associate professor Toshinao Ineno of Kindai University’s Aquaculture Research Institute told the Advocate. “If we can get rid of the males from the beginning and we know for sure that all our fish are female, the cost of determining the sex of the fish can be brought down significantly. Identifying the sex of 1,000 sturgeons requires a team of around five people over 30 days. In addition to labor costs, there is also the cost of feed that’s used while the farmers wait until the fish are three years old.

“We estimate that these costs are around 25 percent of overall production costs, but this can be reduced by making all our fish female,” he added.

Four months after their artificial incubation, 150 juvenile Siberian sturgeons were given feed mixed with the hormone estradiol for about six months before their diet was switched back to regular feed. Several were inspected, and all of them contained egg cells.

“The results are extremely promising,” said Ineno. “As well as producing caviar, an all-female batch of sturgeon is advantageous for other reasons. Sturgeons are big fish to rear, which means that we need more water and bigger rearing facilities. This is a significant hurdle to overcome in mass production and another reason why we started looking into all-female batches.”

“Rearing sturgeon is not without challenges, and it’s difficult to produce a stable amount of caviar,” says Moto-o Sakamoto, president of Japan Caviar Inc., a company in Miyazaki that manufactures and sells caviar across Japan. Photo courtesy of Miyazaki Caviar.

“Rearing sturgeon is not without challenges, and it’s difficult to produce a stable amount of caviar,” says Moto-o Sakamoto, president of Japan Caviar Inc., a company in Miyazaki that manufactures and sells caviar across Japan. Photo courtesy of Miyazaki Caviar.

Kindai University started researching sturgeon in 1995 and began selling its own brand of caviar – Kindai Caviar – in 2008. It’s currently rearing 1,500 sturgeons and plans to produce 45 kg of caviar a year over the next 10 years.

“We want to produce caviar to showcase Kindai’s technology and expertise, not profit from sales,” said Ineno. “In order to export caviar abroad, fish farms and caviar factories must be registered under CITES rules but Kindai isn’t yet registered so our goal is to produce caviar for research and sell it within Japan.”

The university is also investigating the possibility of producing all-female batches in other ways.(continue)

Author: Bonnie Waycott / Global Aquaculture Advocate | Read full story here

[email protected]


Click to know how to advertise in FIS
Sep 19, 00:10 (GMT + 9):
Malvinas-Falkland and the owners of the truth
Sep 19, 00:00 (GMT + 9):
Other Media | EuropaAzul: Seafarers: at the heart of the future of maritime transport ', IMO motto
Sep 18, 17:00 (GMT + 9):
World Bank IFC and WOC Partner on Investing in Pacific Blue Economy
United States
Sep 18, 16:00 (GMT + 9):
Marketplace to industry, governments: Solve shrimp diseases
Sep 18, 15:00 (GMT + 9):
OPROMAR organizes a working day on selectivity of fishing gear: projects and initiatives
Sep 18, 07:00 (GMT + 9):
Fishcor told to divorce 'parasitic' partner
Sep 18, 06:40 (GMT + 9):
Wild Barra Fisheries hooks majority share in Northern Territory's barramundi industry
Sep 18, 02:00 (GMT + 9):
Pescanova and Ángel León will collaborate to investigate the seafood innovation
Sep 18, 01:00 (GMT + 9):
Other Media | SeafoodSource: Pablo Múgica named new CEO, Salvador Ramón Mateo appointed chairman at FRIME
Sep 18, 00:50 (GMT + 9):
Other Media | Industrias Pesqueras: Sumbox, Hinojosa's recyclable alternative for fish packaging
Sep 18, 00:40 (GMT + 9):
Other Media | The Fish Site: Raising funds for raising fish
United Kingdom
Sep 18, 00:30 (GMT + 9):
Other Media | fishfarmingexpert: Grieg to shut down Skye farms after mass mortality
United Kingdom
Sep 18, 00:20 (GMT + 9):
Other Media | WorldFishing: COVID-19 hits whole UK seafood supply chain
European Union
Sep 18, 00:10 (GMT + 9):
Other Media | La Voz de Galicia: European Justice will not assess the subrogation of stowage
Sep 18, 00:00 (GMT + 9):
Auction prices for common squid frozen on board │ Hakodate markets (until September 14th 2020)

Green light for a new tuna fishing harbour in Chennai
India As per the Detailed Project Report, the proposed harbour will have fish handling halls, auction hall, cold storage, ice factory, fuelling station, power backup centres and dormitory for workers. CH...
Domestic market frozen fish prices show stability
Russia Fed. From 7 to 13 September, the dynamics of prices for frozen fish in the wholesale segment of the domestic market, basically, showed a tendency towards stability. In the Far East region, there was a ten...
Lloyds Register accepted by MarinTrust as a new registered Certification Body
United Kingdom MarinTrust is pleased to announce that Lloyds Register has been accepted as a third-party certification body (CB) to certify against the MarinTrust program. The MarinTrust team has begun the Lloyds Re...
Crabbers at Southeast ALaska and Kodiak haul up best Dungeness hauls in decades, price sinks
United States   Crabbers at Southeast Alaska and Kodiak are pulling up good Dungeness catches although prices have sunk. At the Panhandle, a fleet of 192 permit holders hauled up nearly six million pounds of d...
Maruha Nichiro Corporation
Nichirei Corporation - Headquarters
Pesquera El Golfo S.A.
Ventisqueros - Productos del Mar Ventisqueros S.A
Wärtsilä Corporation - Wartsila Group Headquarters
ITOCHU Corporation - Headquarters
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.
AquaChile S.A. - Group Headquarters
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
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
Brim ehf (formerly HB Grandi Ltd) - Headquarters
Hamburg Süd Group - (Headquearters)
Armadora Pereira S.A. - Group Headquarters
NOAA - National Oceanic and Atmospheric Administration (Headquarters)
Mowi ASA (formerly 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
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 - Headquarters
Cooke Inc. - Group Headquarters
AKBM - Aker BioMarine ASA
Seafood Choices Alliance -Headquarter-
Austevoll Seafood ASA
Walmart | Wal-Mart Stores, Inc. (Supermarket) - Headquarters
New Japan Radio Co.Ltd (JRC) -Head Office-
Gulfstream JSC
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
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2020 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER