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



Click to know how to advertise in FIS
Sep 26, 18:00 (GMT + 9):
IN BRIEF - China suspends seafood imports from two Russian vessels for a month
Russian Federation
Sep 26, 16:00 (GMT + 9):
Supermarkets in Vladivostok are waiting for the supply of products from the new Russian Pollock plant (video)
Sep 26, 00:50 (GMT + 9):
Other Media | SeafoodNews.com: Marel, Fusion Marine Technology Announce New Partnership
United States
Sep 26, 00:40 (GMT + 9):
Other Media | SeafoodSource: Pacific Seafood facing new coronavirus outbreak at Warrenton facility
Sep 26, 00:10 (GMT + 9):
Other Media | La Voz de Galicia: The sale of seafood on the Internet doubled after the confinement
European Union
Sep 26, 00:10 (GMT + 9):
EFSA to revaluate the risk assessment of parasites in farmed fish products on the basis of new scientific data
United States
Sep 26, 00:00 (GMT + 9):
Other Media | EuropaAzul: Sea Shepherd accuses French trawlers of catching protected species
United States
Sep 26, 00:00 (GMT + 9):
Catch and production DAP | Alaska Pollock: surimi, Fillet-H&G-Mince │ week 37
United States
Sep 26, 00:00 (GMT + 9):
Products derived from alaska pollock and pacific cod (NMFS of DAP in GOA-BSAI): surimi, fillet, roe and fishmeal | week 37
Viet Nam
Sep 25, 17:00 (GMT + 9):
Bright prospects for seafood sector in final quarter
Sep 25, 12:00 (GMT + 9):
Statistics │ Export │ Frozen crab to Japan, Korea, Taiwan, China, Vietnam, USA, Canada and Europe
Sep 25, 07:00 (GMT + 9):
Technology aiding youth boost fish farming
United States
Sep 25, 06:40 (GMT + 9):
IN BRIEF - Tennessee forms commission to halt invasive Asian carp
United Kingdom
Sep 25, 06:00 (GMT + 9):
Antarctic krill take refuge from climate change
South Korea
Sep 25, 03:20 (GMT + 9):
Frozen octopus prices have dropped 15%

Frozen mackerel, 74% imported from Norway
South Korea In August 2020, frozen mackerel imports amounted to 1,908 tons, down 18 % from 2,336 tons a year earlier.  The cumulative import volume reached 29,304 tons in August, up 4 % from 28,227 tons a ye...
The countdown begins for the shrimp
Argentina   The following is an excerpt from an article in Revista Puerto: There are few open areas for fishing, many concentrated boats and bad weather. Yields have dropped in recent weeks and the seaso...
Fisheries and aquaculture are perceived as the most sustainable industry in a new survey
Norway When people are asked what is the most sustainable industry in Norway, 29 percent answer fishing and farming. There are almost twice as many who answer oil and gas, who come in second place. IT, indus...
The responsible fishing standard of the Spanish tuna fleet as a reference for Thai Union and GSA
Spain   Both entities sign an initial one-year agreement to exchange information and knowledge with AENOR, certifier of the standard for our fleet Madrid - The largest producer of canned tuna in the ...
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