Navigation Links
Hatchery fish may hurt efforts to sustain wild salmon runs
Date:6/10/2009

CORVALLIS, Ore. Steelhead trout that are originally bred in hatcheries are so genetically impaired that, even if they survive and reproduce in the wild, their offspring will also be significantly less successful at reproducing, according to a new study published today by researchers from Oregon State University.

The poor reproductive fitness the ability to survive and reproduce of the wild-born offspring of hatchery fish means that adding hatchery fish to wild populations may ultimately be hurting efforts to sustain those wild runs, scientists said.

The study found that a fish born in the wild as the offspring of two hatchery-reared steelhead averaged only 37 percent the reproductive fitness of a fish with two wild parents, and 87 percent the fitness if one parent was wild and one was from a hatchery. Most importantly, these differences were still detectable after a full generation of natural selection in the wild.

The effect of hatcheries on reproductive fitness in succeeding generations had been predicted in theory, experts say, but until now had never been demonstrated in actual field experiments.

"If anyone ever had any doubts about the genetic differences between hatchery and wild fish, the data are now pretty clear," said Michael Blouin, an OSU professor of zoology. "The effect is so strong that it carries over into the first wild-born generation. Even if fish are born in the wild and survive to reproduce, those adults that had hatchery parents still produce substantially fewer surviving offspring than those with wild parents. That's pretty remarkable."

An earlier report, published in 2007 in the journal Science, had already shown that hatchery fish that migrate to the ocean and return to spawn leave far fewer offspring than their wild relatives. The newest findings suggest the problem does not end there, but carries over into their wild-born descendants.

The implication, Blouin said, is that hatche
'/>"/>

Contact: Michael Blouin
blouinm@science.oregonstate.edu
541-737-2362
Oregon State University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Hatchery fish outnumber wild chinook salmon in troubled fall run
2. Study may aid efforts to prevent uncontrolled cell division in cancer
3. Endangered sawfish focus of national collection and recovery efforts
4. Corporate Safe Specialists Launches International Sales Efforts
5. Recovery efforts not enough for critically endangered Asian vulture
6. Scientists to assess Beijing Olympics air pollution control efforts
7. Scripps scientists will assess Beijing Olympics air pollution control efforts
8. Extended cyclone relief efforts aided from space
9. Protein protects lung cancer cells from efforts to fix or kill them
10. DOE JGI releases soybean genome assembly to enable worldwide bioenergy research efforts
11. Great Ape Trust awards $127,000 for international conservation efforts
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/22/2014)...  NXT-ID, Inc. (NASDAQ: NXTD and ... focused on the growing mobile commerce market, announces it ... Apollo Robbins for the 2015 International CES debut ... Apollo Robbins will be at the NXT-ID ... some of his famous theft techniques to visiting media ...
(Date:12/19/2014)... Dec. 18, 2014  23andMe, Inc., the leading personal ... that pinpoints fine-scale differences in genetic ancestry of individuals ... Since immigrants first arrived more than four ... has served as a meeting place for peoples ... and the ongoing mixing of peoples with African, European, ...
(Date:12/17/2014)... RALEIGH, N.C. , Dec. 16, 2014 ... has licensed its PerformTek biometric technology to industry leaders ... their highly accurate, clinically validated, biometric wearable products. These ... January 6-9 in Las Vegas . ... the technology is accurate, flexible and robust – with ...
Breaking Biology News(10 mins):NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 2NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 3NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 423andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2
... post-weaning multi-systemic wasting syndrome (PMWS) on British Pig Industry published, ... PMWS, Farm-level intervention could save farmers up to 11,500 per ... pig virus, present on 99 per cent of pig farms has ... a whole, costing British farmers as much as 84 per pig ...
... could be improved by a discovery about how chickens regulate ... make-up can affect the signals sent from its stomach to ... enough to eat. Poultry farmers often have to restrict ... of fullness and can overeat, affecting their ability to reproduce. ...
... online publication version of Nature today presents two manuscripts ... and domestication of wheat. These achievements are the results ... and Developmental Biology (IGDB), Chinese Academy of Sciences, Chinese ... projects sequenced and analyzed two ancestral wheat genomes of ...
Cached Biology News:Pig wasting syndrome costing farmers millions 2Appetite genes are key to better diets for poultry, study shows 2The latest genomic studies of wheat sheds new light on crop adaptation and domestication 2The latest genomic studies of wheat sheds new light on crop adaptation and domestication 3
(Date:12/22/2014)... Dec. 22, 2014  ( www.competitivehealth.com ) — Competitive ... medical bill review and advocacy service, has signed an ... WellCard Savings discount health services marketplace. 63% ... more than they expected to pay. As part of ... costs, WellCard Savings is pleased to offer medical bill ...
(Date:12/22/2014)... 22, 2014 Fertility Associates of Memphis ... Bank USA , a network of more than 20 ... partnership, patients have fast access to a national pool ... IVF . Fertility Associates of Memphis is the only ... treatment option. , Dr. William Kutteh , director ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one ... of Nick Maroulis, Pharm.D. to the newly created position ... In this position, Dr. Maroulis will continue to manage ... of our multi-site pharmacies as the company expands. Dr. ... that time he has served in many different capacities ...
(Date:12/19/2014)... Dec. 19, 2014 Bina Technologies, Inc. (Bina, ... that they have been acquired by Roche (SIX: RO, ... privately held company that provides a big data platform ... (NGS) data for the academic and translational research markets. ... and will continue to focus on development of their ...
Breaking Biology Technology:WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3
... (WNS) is a poorly understood condition that, in the two ... northeastern states and killed as many as half a million ... measure that may help save the affected bats: providing localized ... no idea why it,s spreading so rapidly," says Justin Boyles, ...
... 5 Cardium Therapeutics (NYSE Alternext US: CXM) today announced ... form of debt with accompanying warrants to purchase shares of ... and sole placement agent for the transaction. The material ... in the Company,s Current Report on Form 8-K to be ...
... March 6 S*BIO Pte Ltd today announced ... Emerging BioScience Company of Singapore Award. Dr. Stephen ... the award on behalf of the company, from ... and Industry.The Annual BioSpectrum awards recognize outstanding contributions ...
Cached Biology Technology:Ecologists propose first prevention for white-nose syndrome death in bats 2Ecologists propose first prevention for white-nose syndrome death in bats 3Cardium Completes $3.5 Million Credit Facility 2Cardium Completes $3.5 Million Credit Facility 3Cardium Completes $3.5 Million Credit Facility 4S*BIO Receives BioSpectrum Editor's Choice, Emerging BioScience Company of Singapore Award 2S*BIO Receives BioSpectrum Editor's Choice, Emerging BioScience Company of Singapore Award 3