Featured Research

from universities, journals, and other organizations

Better control of reproduction in trout and salmon may be in aquaculture's future

Date:
July 23, 2010
Source:
USDA/Agricultural Research Service
Summary:
Fast-growing farm-raised salmon and trout that are sterile can now be produced using a method developed by agricultural scientists. Blocking reproduction can enhance growth, and is important for fish being reared in situations where reproduction is undesirable.

ARS scientists have developed a more efficient way to produce Atlantic salmon that are sterile so they grow faster and cannot interbreed with wild salmon.
Credit: Photo by Troutlodge, Inc.

Fast-growing farm-raised salmon and trout that are sterile can now be produced using a method developed by Agricultural Research Service (ARS) scientists. Blocking reproduction can enhance growth, and is important for fish being reared in situations where reproduction is undesirable.

The method allows researchers to more efficiently and reliably produce fish that have three sets of chromosomes, instead of the usual two sets. Fish with the extra set of chromosomes can't reproduce, so the energy from the food they eat is shifted from reproduction to growth. Also, cultured fish that are not capable of breeding with native populations can be stocked in natural waters.

Bigger fish for consumers and sterile fish for producers and anglers are the goals of ARS scientists who are working with the aquaculture industry on genetic methods to more efficiently produce fish that grow faster on less feed and can't reproduce in the wild.

William K. Hershberger, former research leader at the ARS National Center for Cool and Cold Water Aquaculture (NCCCWA) in Leetown, W.Va., and NCCCWA biologist Mark Hostuttler investigated the earliest stages of fish development, from fertilized egg to the two-cell stage, and developed a more effective way to produce rainbow trout that have four sets of chromosomes. Those trout are then crossed with typical fish that have two chromosome sets, yielding offspring that have the desired three sets of chromosomes.

Now, ARS fish physiologist Gregory Weber and Hostuttler have improved on that method, and preliminary studies have expanded its application to Atlantic salmon, brook trout and brown trout. They are also in the process of breeding these fish for experiments that will determine whether these three-chromosome-set fish are good performers in terms of production traits such as growth to market size, stress tolerance, and disease resistance.

Additionally, Weber and Hostuttler have developed a way to validate chromosome status on 20 fish at a time, instead of just one.


Story Source:

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


Cite This Page:

USDA/Agricultural Research Service. "Better control of reproduction in trout and salmon may be in aquaculture's future." ScienceDaily. ScienceDaily, 23 July 2010. <www.sciencedaily.com/releases/2010/07/100721112147.htm>.
USDA/Agricultural Research Service. (2010, July 23). Better control of reproduction in trout and salmon may be in aquaculture's future. ScienceDaily. Retrieved September 21, 2014 from www.sciencedaily.com/releases/2010/07/100721112147.htm
USDA/Agricultural Research Service. "Better control of reproduction in trout and salmon may be in aquaculture's future." ScienceDaily. www.sciencedaily.com/releases/2010/07/100721112147.htm (accessed September 21, 2014).

Share This



More Plants & Animals News

Sunday, September 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: San Diego Zoo Welcomes Cheetah Cubs

Raw: San Diego Zoo Welcomes Cheetah Cubs

AP (Sep. 20, 2014) The San Diego Zoo has welcomed two Cheetah cubs to its Safari Park. The nearly three-week-old female cubs are being hand fed and are receiving around the clock care. (Sept. 20) Video provided by AP
Powered by NewsLook.com
Chocolate Museum Opens in Brussels

Chocolate Museum Opens in Brussels

AFP (Sep. 19, 2014) Considered a "national heritage" in Belgium, chocolate now has a new museum in Brussels. In a former chocolate factory, visitors to the permanent exhibition spaces, workshops and tastings can discover derivatives of the cocoa bean. Duration: 01:00 Video provided by AFP
Powered by NewsLook.com
Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. Video provided by Newsy
Powered by NewsLook.com
Jury Delivers Verdict in Salmonella Trial

Jury Delivers Verdict in Salmonella Trial

AP (Sep. 19, 2014) A federal jury has convicted three people in connection with an outbreak of salmonella poisoning five years ago that sickened hundreds of people and was linked to a number of deaths. (Sept. 19) Video provided by AP
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