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


Bluefin tuna, Thunnus orientalis. (Photo Credit: OpenCage - CC BY-SA 2.5)

Pacific bluefin tuna exceptional eyesight revealed by revolutionary DNA study

Click on the flag for more information about Japan JAPAN
Thursday, July 25, 2013, 02:20 (GMT + 9)

For the first time, a team of Japanese researchers have been able to sequence the complete genome of the Pacific bluefin tuna (Thunnus orientalis) and to identify the genes that are responsible for its remarkable eyesight. This feature has turned this species into an extremely efficient predator in the ocean.

In their study, published in the Proceedings of the National Academy of Sciences, using next-generation sequencing technology, the scientists have singled out several retina genomes. They then compared the genes of several fish species and found the Bluefin tuna to be the most developed.

From a total of 26,433 protein-coded genes, five common fish visual pigment genes were identified, one of them being the green-sensitive (RH2) opsin gene. Pacific bluefin tuna has at least five copies of the RH2 opsin gene, the most evolved among the fish analysed by the scientists.

Further analysis revealed that this species of tuna has undergone a unique evolution which may have helped develop its sharp vision, the most acute of all vertebrate fish, according to the genome study. This makes it a deadly oceanic predator as the bluefin tuna can measure the distance to prey and easily detect it.

“We now know that the tuna has excellent colour recognition,” says Mitsuru Ototake, chief of the Fishery Reserach Agency ’s Research Centre for Aquatic Genomics. “We may be able to reduce collision deaths if we conduct further research on colours tuna can clearly see.”

The bluefin tuna is of special interest due to its expensive price in the market. In Japan, where prices at Tokyo’s famous Tsukiji fish market can fetch a record-breaking USD 736,000 for a single fish, it is considered a delicacy. Overfishing and exploitation have caused concern over the future of this species and it is hoped that the study will help with conservation issues and better ocean-wide resource management.
 

By Gabriela Raffaele
editorial@fis.com
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
Finland
Sep 29, 02:40 (GMT + 9):
IN BRIEF - Newly introduced fish species set to replace imported salmon
United States
Sep 29, 02:40 (GMT + 9):
IN BRIEF - University of New Hampshire launches aquaculture farming project
China
Sep 29, 02:20 (GMT + 9):
Aquatic Foods experiences revenue drop in H1
Mexico
Sep 29, 02:10 (GMT + 9):
PROFEPA certifies TED installation in shrimp fleet
Norway
Sep 29, 02:00 (GMT + 9):
IN BRIEF - Havfisk ASA: insiders have accepted the offer from Lerøy Seafood Group
United Kingdom
Sep 29, 02:00 (GMT + 9):
IN BRIEF - Global fish and seafood market will see consistent healthy growth through to 2020, says MarketLine
Norway
Sep 29, 02:00 (GMT + 9):
IN BRIEF - Construction underway of onshore salmon broodstock and egg production facility
Australia
Sep 29, 02:00 (GMT + 9):
IN BRIEF - Okehampton Bay salmon farm proposal receives in-principle council backing
United Kingdom
Sep 29, 02:00 (GMT + 9):
IN BRIEF - Activists protest against unsustainable tuna at Eastbourne store
Australia
Sep 29, 02:00 (GMT + 9):
IN BRIEF - Okehampton Bay salmon farm proposal receives in-principle council backing
American Samoa
Sep 29, 01:40 (GMT + 9):
IN BRIEF - American Samoa plant to shut over fish shortage
European Union
Sep 29, 01:40 (GMT + 9):
Medium term strategy to help protect Mediterranean fish stocks
United States
Sep 29, 01:10 (GMT + 9):
Light emission method helps detect harmful bacteria in food
European Union
Sep 28, 23:50 (GMT + 9):
Brussels proposes sharp cuts for Baltic cod quota
Canada
Sep 28, 23:30 (GMT + 9):
Grieg to set up largest indoor Atlantic salmon farming facility in Newfoundland



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Vietnam’s largest fishmeal factory starts operations
Viet Nam The largest fishmeal factory in Vietnam, which required a USD 3 million investment, has just started its operations in the province of Ca Mau, in the south of the country.
Fishermen sue Taiwanese steel firm over massive fish kill
Viet Nam Hundreds of Vietnamese fishermen have sued a Taiwanese steel company, accusing it of dropping toxic chemicals that caused a massive fish kill off the central Vietnamese coast in April.
China to invest USD 3 billion on fisheries and aquaculture projects
Iran The agriculture ministers of Iran and China signed two fisheries and aquaculture cooperation deals to boost bilateral ties in those two sectors.
First 'marine monument' created in the Atlantic
United States The United States Government has created the Atlantic Ocean's first marine national monument, saying that the new protected area was a needed response to risky climate changes, ocean dead zones and unsustainable fishing practices.
 
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
Nueva Pescanova, S.L. - Group 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. -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 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 - 2016 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER