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
United States
Feb 9, 05:00 (GMT + 9):
IN BRIEF - FDA: Giant Eagle Voluntarily Recalls Japanese Hand Breaded Cod Fillets
United States
Feb 9, 05:00 (GMT + 9):
IN BRIEF - Bristol Bay Waypoints: February 8, 2016 February Board Meeting Canceled
India
Feb 9, 02:40 (GMT + 9):
Fisheries specialists recommend a greater role for women in aquaculture
United States
Feb 9, 02:20 (GMT + 9):
IN BRIEF - Oyster aquaculture on the rise
United Kingdom
Feb 9, 02:20 (GMT + 9):
IN BRIEF - Isles fisheries groups awarded support and development funds in a UK first
Panama
Feb 9, 02:10 (GMT + 9):
Cooperation agreement seeks to strengthen fisheries research
Myanmar
Feb 9, 02:00 (GMT + 9):
IN BRIEF - Report highlights Myanmar’s aquaculture potential
Angola
Feb 9, 02:00 (GMT + 9):
IN BRIEF - Fisheries Minister Inaugurates Fishmeal Factory
Marshall Islands
Feb 9, 02:00 (GMT + 9):
IN BRIEF - Fisheries group chief: US fishing treaty a ‘distraction’
Fiji
Feb 9, 01:40 (GMT + 9):
New multi-species hatchery to boost aquaculture
Australia
Feb 9, 01:00 (GMT + 9):
John West to deliver more than 100m ecolabelled tuna cans
United States
Feb 9, 00:00 (GMT + 9):
IN BRIEF - Mercury, DDT and other contaminants in fish are at a four-decade low
United States
Feb 9, 00:00 (GMT + 9):
IN BRIEF - Intersex Fish Found In Protected Waters
Bangladesh
Feb 9, 00:00 (GMT + 9):
IN BRIEF - Govt plans to ban catch Hilsa fish for 22 days
Namibia
Feb 9, 00:00 (GMT + 9):
IN BRIEF - Namibia benefits from Cuban aquaculture experts



Lenguaje
FEATURED EVENTS
  
TOP STORIES
NOAA proposes new traceability plan to combat IUU fishing
United States NOAA announced a proposal to implement a traceability plan for fishery products, aimed at combating illegal, unreported and unregulated fishing and to prevent fraudulent trade.
Online platform opens up new opportunities for New Zealand's seafood in China
New Zealand New Zealand seafood retailers may now reach new consumers based in China’s rural villages through Alibaba Group’s B2C e-commerce platform, Tmall.com.
Significant impact of climate change on Northeast fisheries, study foresees
Worldwide NOAA scientists have released the first multispecies assessment of how vulnerable U.S. marine fish and invertebrate species are to the effects of climate change.
Switzerland launches USD 2m-project to boost Egyptian aquaculture
Egypt The Embassy of Switzerland’s Office for International Cooperation, in collaboration with WorldFish and CARE International, has launched a project aimed at boosting production of inexpensive, nutritious and safe fish from sustainable aquaculture systems in Egypt.
 
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