Featured Research

from universities, journals, and other organizations

Progress Toward Larger Trout

Date:
July 27, 2005
Source:
USDA/Agricultural Research Service
Summary:
Bigger rainbow trout for consumers is the goal of Agricultural Research Service (ARS) scientists who are working with industry on genetic methods to more efficiently produce fish that grow faster. William K. Hershberger, research leader at the ARS National Center for Cool and Cold Water Aquaculture in Kearneysville, W.Va., and his colleagues have developed a more effective way to produce rainbow trout that have three sets of chromosomes instead of the usual two sets.

Rainbow trout.
Credit: Photo by Ken Hammond, USDA

Bigger rainbow trout for consumers is the goal of Agricultural Research Service (ARS) scientists who are working with industry on genetic methods to more efficiently produce fish that grow faster.

William K. Hershberger, research leader at the ARS National Center for Cool and Cold Water Aquaculture in Kearneysville, W.Va., and his colleagues have developed a more effective way to produce rainbow trout that have three sets of chromosomes instead of the usual two sets.

Trout with three chromosome sets grew faster than fish with two sets, so the industry tries to breed fish with three sets for meat production. Rainbow trout with three sets of chromosomes grow faster because they are unable to reproduce. The energy from the food they eat is shifted from reproduction to growth.

One of the most reliable ways to produce fish with three sets of chromosomes is to cross fish that have four sets of chromosomes with typical fish that have two sets. Trout with four sets can be created by precise, high-pressure treatment of rainbow trout embryos during very early development. Hershberger and his group have succeeded in fine-tuning the treatment procedures to more reliably yield rainbow trout with four sets of chromosomes.

Meeting consumer demand for trout requires an increase in production. Marketable trout size has increased from one pound to almost two pounds and is continuing to increase, due to consumer desire for an 8- to 10-ounce fillet.

Production of sterile, three-chromosome-set fish ensures no genetic interaction with indigenous stocks, meaning these fish can be used to protect native germplasm. These characteristics can ensure environmental security and improve profit for the aquaculture industry.

ARS is the U.S. Department of Agriculture's chief in-house scientific research agency.


Story Source:

The above story is based on materials provided by USDA/Agricultural Research Service. Note: Materials may be edited for content and length.


Cite This Page:

USDA/Agricultural Research Service. "Progress Toward Larger Trout." ScienceDaily. ScienceDaily, 27 July 2005. <www.sciencedaily.com/releases/2005/07/050727062423.htm>.
USDA/Agricultural Research Service. (2005, July 27). Progress Toward Larger Trout. ScienceDaily. Retrieved July 28, 2014 from www.sciencedaily.com/releases/2005/07/050727062423.htm
USDA/Agricultural Research Service. "Progress Toward Larger Trout." ScienceDaily. www.sciencedaily.com/releases/2005/07/050727062423.htm (accessed July 28, 2014).

Share This




More Plants & Animals News

Monday, July 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Sea Turtle Hatchlings Emerge from Nest

Raw: Sea Turtle Hatchlings Emerge from Nest

AP (July 27, 2014) A live-streaming webcam catches loggerhead sea turtle hatchlings emerging from a nest in the Florida Keys. (July 27) Video provided by AP
Powered by NewsLook.com
Trees Could Save More Than 850 Lives Each Year

Trees Could Save More Than 850 Lives Each Year

Newsy (July 27, 2014) A national study conducted by the USDA Forest Service found that trees collectively save more than 850 lives on an annual basis. Video provided by Newsy
Powered by NewsLook.com
What's To Blame For Worst Ebola Outbreak In History?

What's To Blame For Worst Ebola Outbreak In History?

Newsy (July 27, 2014) A U.S. doctor has tested positive for the deadly Ebola virus, as the worst-ever outbreak continues to grow. Video provided by Newsy
Powered by NewsLook.com
The New York Times Backs Pot Legalization

The New York Times Backs Pot Legalization

Newsy (July 27, 2014) The New York Times has officially endorsed the legalization of marijuana, but why now, and to what end? Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins