Navigation Links
Salmonid hatcheries cause 'stunning' loss of reproduction
Date:10/4/2007

CORVALLIS, Ore. The rearing of steelhead trout in hatcheries causes a dramatic and unexpectedly fast drop in their ability to reproduce in the wild, a new Oregon State University study shows, and raises serious questions about the wisdom of historic hatchery practices.

The research, to be published Friday in the journal Science, demonstrates for the first time that the reproductive success of steelhead trout, an important salmonid species, can drop by close to 40 percent per captive-reared generation. The study reflects data from experiments in Oregons Hood River.

For fish to so quickly lose their ability to reproduce is stunning, its just remarkable, said Michael Blouin, an OSU associate professor of zoology. We were not surprised at the type of effect but at the speed. We thought it would be more gradual. If it werent our own data I would have difficulty believing the results.

Fish reared in a hatchery for two generations had around half the reproductive fitness of fish reared for a single generation. The effects appear to be genetic, scientists said, and probably result from evolutionary pressures that quickly select for characteristics that are favored in the safe, placid world of the hatchery, but not in the comparatively hostile natural environment.

Among other things, this study proves with no doubt that wild fish and hatchery fish are not the same, despite their appearances, said Michael Blouin, an OSU associate professor of zoology. Some have suggested that hatchery and wild fish are equivalent, but these data really put the final nail in the coffin of that argument.

Even a few generations of domestication may have significant negative effects, and repeated use of captive-reared parents to supplement wild populations should be carefully reconsidered, the scientists said in their report.

Traditionally, salmon and steelhead hatcheries obtained their brood stock and eggs from fish that were repea
'/>"/>

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

Page: 1 2 3

Related biology news :

1. Dysentery uses sword and shield to cause infection
2. Scientists detect probable genetic cause of some Parkinsons disease cases
3. BRCA1 causes ovarian cancer through indirect, biochemical route
4. Scientists decipher genome of fungus that can cause life-threatening infections
5. Researchers discover molecule that causes secondary stroke
6. UF Researchers Map Bacterial Proteins That Cause Tooth Loss
7. Molecule that usually protects infection-fighting cells may cause plaque deposits inside arteries
8. NASA study finds snow melt causes large ocean plant blooms
9. New Estimates For The Causes Of Child Deaths Worldwide
10. Emergence of cancer as major cause of childhood death in developing countries is not being adequately addressed
11. UNC launches study of liver injury caused by drugs
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/8/2015)... , N.J. and NEW YORK , ... and Guidepoint today announced BD & ... healthcare companies with free access to Guidepoint,s expert network ... start-ups that are developing cutting-edge technologies to improve healthcare ... dedicated Guidepoint research manager, each start-up entrepreneur will be ...
(Date:7/7/2015)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... market announces a revised version of one of its first 30 ... on CNBC in New York , ... San Francisco metro areas.    , ... to replace all the cards in your wallet and keep your ...
(Date:6/30/2015)... HATFIELD, Pa. , June 30, 2015 ... joined the company as CEO to help further develop ... a wealth of partnering experience, having spent much of ... companies including Therakine, Amgen, Baxter Bioscience, and Johnson & ... a focus on Technology and Biotech Corporate Finance. He ...
Breaking Biology News(10 mins):BD and Guidepoint Team to Connect Healthcare Start-up Companies With Business and Scientific Experts 2BD and Guidepoint Team to Connect Healthcare Start-up Companies With Business and Scientific Experts 3Wocket Smart Wallet Commercials Airing on CNBC to Showcase This Summer's Must- Have Tech Product 2Wocket Smart Wallet Commercials Airing on CNBC to Showcase This Summer's Must- Have Tech Product 3Genisphere Appoints New CEO, Thomas Bliss 2Genisphere Appoints New CEO, Thomas Bliss 3
... MD August 16, 2011 Maurice Godfrey, PhD, ... the University of Nebraska Medical Center, was recently awarded ... Genetics (ASHG) for his proposal titled, "Luck of the ... funded through the Society,s 2011 Genetics Education Research Program. ...
... -- Today, oxygen takes up a hefty portion of Earth,s ... air we breathe. However, very early in Earth,s history, O2 ... in the turbulent mix of primordial gases. It wasn,t until ... when oxygen made any measurable dent in the atmosphere, stimulating ...
... August 16, 2011To overcome the unique challenges faced by ... color who have sex with men (YMSM of Color)novel ... prevention services were recently evaluated. The innovative outreach and ... are presented in a special supplement issue of ...
Cached Biology News:MIT: Oxygen's watery past 2MIT: Oxygen's watery past 3
(Date:7/29/2015)...  Therapath Neuropathology ( www.Therapath.com ), a leader ... and Military Medical centers both domestically and worldwide.  ... Sweat Gland Nerve Fiber Density (SGNFD) for the ... Demonstration of a reduction in ... skin biopsy is a highly sensitive and specific ...
(Date:7/29/2015)... 29, 2015 /PRNewswire/ - RepliCel Life Sciences Inc. (OTCQB: ... company, is pleased to announce that the final design ... been locked.  Prototypes for industrial and regulatory testing ... application for CE mark clearance to market the ... 2016. (Photo: http://photos.prnewswire.com/prnh/20150729/248373 )  ...
(Date:7/29/2015)... ... July 29, 2015 , ... Available in select ... Contouring Bi-Gel, a nighttime-specific product that targets fat cells for extreme contouring action. ... to enter fat cells, inhibiting the formation of new fat. Upon waking CHRONODIET ...
(Date:7/29/2015)... ... 2015 , ... Nearly everyone has heard of the potential of stem cells ... rich source of these cells is teeth—baby teeth that come loose during childhood, wisdom ... to make room for braces. These potent stem cells exist in the dental ...
Breaking Biology Technology:Neuropathology services for VA and Military health systems 2RepliCel Life Sciences Unveils Innovative Dermal Injector Prototype 2RepliCel Life Sciences Unveils Innovative Dermal Injector Prototype 3RepliCel Life Sciences Unveils Innovative Dermal Injector Prototype 4RepliCel Life Sciences Unveils Innovative Dermal Injector Prototype 5Phytocéane introduces CHRONO NIGHT Express Contouring Bi-Gel 2Phytocéane introduces CHRONO NIGHT Express Contouring Bi-Gel 3Advanced Oral and Maxillofacial Surgery (AOMS) in Elmhurst, IL Partners with Provia Labs to make Store-A-Tooth™ Dental Stem Cell Banking Available to their Patients 2
... - Researchers are making progress in creating digital transistors ... thought to dramatically limit the material,s use in computers ... of carbon that conducts electricity with little resistance or ... earned a Nobel Prize in physics - it was ...
... was named by FierceBiotech today as one of 2011,s ... promising private biotechnology companies in the industry. This is FierceBiotech,s ... has done a super job of raising the funds and ... combination therapy – toward the market," says Ryan McBride, the ...
... Wash. and VANCOUVER, British Columbia, Sept. 6, 2011 ... today that data from two studies, a Phase II ... compound custirsen (OGX-011/TV-1011), were published in the September issues ... Cancer Research . Custirsen inhibits ...
Cached Biology Technology:Innovation is step toward digital graphene transistors 2FierceBiotech Names Pearl Therapeutics a 2011 Fierce 15 Biotech 2FierceBiotech Names Pearl Therapeutics a 2011 Fierce 15 Biotech 3OncoGenex Announces Publication of Custirsen Phase II Clinical and Pre-Clinical Data in Leading Cancer Journals 2OncoGenex Announces Publication of Custirsen Phase II Clinical and Pre-Clinical Data in Leading Cancer Journals 3OncoGenex Announces Publication of Custirsen Phase II Clinical and Pre-Clinical Data in Leading Cancer Journals 4OncoGenex Announces Publication of Custirsen Phase II Clinical and Pre-Clinical Data in Leading Cancer Journals 5
Anti-MMP-14, catalytic domain, clone LEM-2/15.8 Immunogen: Synthetic peptide: amino acid sequence 218-233 within the catalytic domain Available Date: 38579...
Rabbit polyclonal to Raf1 ( Abpromise for all tested applications). entrezGeneID: 5894 SwissProtID: P04049...
Rabbit anti MMP-13, Hinge Region MMP-13 Hinge Region...
Rabbit polyclonal to MAP3K12 ( Abpromise for all tested applications). Antigen: Synthetic peptide conjugated to KLH from the C-terminal region of human MAP3K12 Entrez Gene ID: 7786 Swiss ...
Biology Products: