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


Yellow perch. (Photo Credit: USDA)

New method distinguishes yellow perch sex

Click on the flag for more information about United States UNITED STATES
Tuesday, June 03, 2014, 04:00 (GMT + 9)

Identifying juvenile and adult yellow perch females from males is no longer an obstacle for aquaculture producers of this high-value fish, thanks to US Department of Agriculture (USDA) scientists. A new step-by-step procedure developed by the scientists makes it easier to separate fish by gender for growth performance, physiological studies and to manage broodstocks for reproduction and genetic selection.

Physiologist Brian Shepherd and his colleagues at the Agricultural Research Service (ARS) Dairy Forage and Aquaculture Research Unit in Milwaukee, Wisconsin, developed the systematic method to segregate yellow perch females from males during early growth stages. Because females tend to grow faster and larger than males, females could often be mistaken for males when being selected for genetic improvement prior to reproductive maturity. Previously, it was extremely difficult to identify gender until fish matured (up to two years).

The method involves an algorithm—a checklist that includes the size of the fish and the shape and colour of the anal and reproductive openings. The process is fast, easy, reliable and more than 97 per cent accurate in fish above three inches in length.

Factors such as size and geographical origin can affect external characteristics related to yellow perch gender. Therefore, scientists examined yellow perch strains from four different geographical areas, while considering body size and reproductive maturity. They then identified female and male characteristics that could be confirmed in yellow perch of various sizes from the four geographical strains.

The new system allows producers as well as scientists to identify the largest females and males for producing the next generation of yellow perch. Because fish are unharmed during the process, the method also can be used to identify females from males when wild yellow perch field surveys are taken.

editorial@fis.com
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
Peru
May 5, 21:50 (GMT + 9):
Minimum size set for crab catch
Norway
May 5, 04:00 (GMT + 9):
IN BRIEF - Norway Royal Salmon says expects very high salmon prices in 2016
United Kingdom
May 5, 03:50 (GMT + 9):
IN BRIEF - Fish and chip 'Oscars' casts net to Liverpool
Sweden
May 5, 03:10 (GMT + 9):
Can fish species survive in icy water in winter?
Norway
May 5, 03:10 (GMT + 9):
Norway Royal Salmon obtains record results in Q1
United States
May 5, 03:00 (GMT + 9):
IN BRIEF - State seeks dismissal of lawsuit over governor's admin order
India
May 5, 03:00 (GMT + 9):
IN BRIEF - Sizzling temperatures may hit seafood exports
Germany
May 5, 03:00 (GMT + 9):
IN BRIEF - GLOBALG.A.P. Introduces Label for Certified Aquaculture
Norway
May 5, 03:00 (GMT + 9):
IN BRIEF - Additional protocol to the EEC-Norway agreement
United Kingdom
May 5, 03:00 (GMT + 9):
IN BRIEF - Fusion Marine wins GBP 900,000 salmon pen supply deal
Iceland
May 5, 03:00 (GMT + 9):
IN BRIEF - Additional protocol to the EEC-Iceland agreement
Chile
May 5, 02:40 (GMT + 9):
Los Lagos fishermen’s complaints affect salmon and mussel sectors
Japan
May 5, 02:10 (GMT + 9):
Nissui intends to boost EPA production
Spain
May 5, 00:30 (GMT + 9):
Tinamenor workers fight for Cantabrian plant continuation
Norway
May 4, 23:40 (GMT + 9):
Seafood exports pose a growing trend



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Tuna sector contributes USD 42 billion annually to global economy
Worldwide A study released by The Pew Charitable Trusts has estimated that the tuna sector contributes more than USD 42 billion to the global economy annually.
Honduran shrimp farm obtains ASC certification
Honduras Finca Granjas Marinas San Bernado farm in Honduras has successfully gained ASC certification for responsible shrimp farming.
BP to finally pay USD 1000 million to fishing sector
United States British Petroleum plc. firm has finally decided to pay off USD 1 billion it owed in compensation to seafood interests affected by the Gulf of Mexico oil spill in 2010.
EU’s possible lobster restrictions also worry Massachusetts
United States Massachusetts lawmakers have joined those from Maine in their work to prevent a possible ban on North American lobster by the European Union.
 
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