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
New Zealand
Jul 25, 04:40 (GMT + 9):
IN BRIEF - Steve Yung appointed as new Sealord CEO
Iceland
Jul 25, 04:40 (GMT + 9):
IN BRIEF - Marel hf. - Marel Q2 2014 Results
United Kingdom
Jul 25, 04:40 (GMT + 9):
IN BRIEF - Fishing industry sends message to Cameron over discards
Australia
Jul 25, 04:30 (GMT + 9):
IN BRIEF - Salmon producer Tassal given almost AUD 4 million for fish by-product factory near Triabunna
Australia
Jul 25, 04:30 (GMT + 9):
IN BRIEF - Aquaculture report recommends regulatory reform
New Zealand
Jul 25, 04:30 (GMT + 9):
IN BRIEF - Antarctic fish should survive global warming - research
Japan
Jul 25, 04:30 (GMT + 9):
EN BREVE - Eel farmers face state regulation to manage new extinction risk
Canada
Jul 25, 04:30 (GMT + 9):
IN BRIEF - Gail Shea would 'look at all the options' on food fishery
United Kingdom
Jul 25, 04:10 (GMT + 9):
Thirty new MPAs designated to protect Scotland's seas
Argentina
Jul 25, 03:40 (GMT + 9):
Alpesca fishing quota transfer assessed
United Kingdom
Jul 25, 03:10 (GMT + 9):
IN BRIEF - Scottish fishermen play key role in Marine Protected Area designation
Worldwide
Jul 25, 03:00 (GMT + 9):
FIS clarifies misinterpretation of tuna group campaign
Japan
Jul 25, 02:40 (GMT + 9):
Itochu settles strategic agreement with Thai group
Netherlands
Jul 25, 02:30 (GMT + 9):
IN BRIEF - Nutreco reports higher first half year results
Argentina
Jul 25, 01:10 (GMT + 9):
Extra insolvency agreement between Vieira and Newsan



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Codex once again discusses biotoxin standards in bivalve molluscs
Chile The Chilean government managed to have the proposed performance criteria for identification methods of marine biotoxins in live and raw bivalve molluscs once again discussed at the general meeting of the Codex Alimentarius, held in Geneva, Switzerland.
Genetically improved tilapia delivered to Ivory Coast
Brazil A shipment of genetically improved tilapia was delivered this week to the Government of Ivory Coast by the head of the Ministry of Fisheries and Aquaculture from Brazil continuing a relation that started more than four decades ago.
EPA intends to protect salmon fisheries from Pebble Mine
United States The US Environmental Protection Agency proposes restrictions on a massive gold-and-copper prospect development near the headwaters of the world’s most valuable salmon fisheries, in Bristol Bay, Alaska.
Squid skin protein can boost bioelectronics
United States A team of researchers has discovered that reflectin, a protein in the skin of the common pencil squid (Loliginidae) can conduct positive electrical charges, or protons, making it a promising material for building biologically inspired devices.
 
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 (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Pescanova, S.A. - Group Headquarters
Sea Harvest Corporation (PTY) Ltd.
I&J - Irvin & Johnson Limited
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 ehf - 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-
Grupo Calvo - Luis Calvo Sanz, S.A. (Group 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
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 - 2014 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER