Navigation Links
Speed trap for fish catches domestic trout moving too slow
Date:3/10/2014

PULLMAN, Wash.Washington State University researchers have documented dramatic differences in the swimming ability of domesticated trout and their wilder relatives. The study calls into question the ability of hatcheries to mitigate more than a century of disturbances to wild fish populations.

Kristy Bellinger, who did the study for her work on a Ph.D. in zoology, said traditional hatcheries commonly breed for large fish at the cost of the speed they need to escape predators in the wild.

"The use of hatcheries to support declining wild salmon and steelhead is controversial," said Bellinger. "They have a role as being both a part of the solution in supplementing depleted stocks and as being a hindrance to boosting natural populations, as they often produce fish that look and behave differently from their wild relatives."

Bellinger conducted the study with Gary Thorgaard, a nationally recognized fish geneticist and professor in WSU's School of Biological Sciences, and her advisor, Associate Professor Patrick Carter. Their work is published in the journal Aquaculture.

The study used a sort of speed trap for fish, a meter-long plastic tank filled with water and fitted with electronic sensors. Over 10 weeks, Bellinger repeatedly ran 100 clonal (genetically similar) hatchery-raised and semi-wild rainbow trout through the tank, clocking their speed and monitoring their growth from week to week. The clonal rainbow trout were propagated on the WSU campus.

The domesticated fish tended to grow faster. But while increased size is generally seen as a sign of fitness, the researchers saw that wasn't the case as far as speed is concerned. "The highly domesticated fish have bigger body sizes but slower swim speeds compared to the more wild lines that are smaller," said Bellinger. "It is intuitive to think that the more you feed them, the more they're going to grow, the faster they're going to be, and that's what we see within each clonal line. However, between the lines, the domesticated fish were larger but slower sprinters."

Over the past century, hatcheries have become a mainstay of recreational fishing, providing millions of trout and other salmonids to lakes and streams. More recently, hatcheries have come to be seen as tools in conserving native stocks. The state of Washington has more than 200 hatcheries, with most producing salmon and steelhead, an ocean-running trout, and about one-fourth producing trout and other game fish.

Hatchery managers, said Bellinger, tend to select for large fish.

"Fish managers want the biggest bang for their buck," she said. "But if increased size is a tradeoff of sprint speed, as our data show, then we assume hatchery fish are being picked off by predators due to their slower speed, which makes the process of supplementing native fish with hatchery fish an inefficient tool for conservation and a waste of money."


'/>"/>

Contact: Kristy Bellinger
klbellin@gmail.com
402-960-1370
Washington State University
Source:Eurekalert  

Related biology news :

1. Columbia Engineering and Penn researchers increase speed of single-molecule measurements
2. Need for speed
3. BGI and Aspera collaborate on high-speed data exchange to advance genome research
4. Analysis of speed of Greenland glaciers gives new insight for rising sea level
5. Worlds largest release of comprehensive human cancer genome data helps speed discoveries
6. Speeding up drug discovery with rapid 3-D mapping of proteins
7. 7 pharmaceutical companies join academic researchers to speed TB drug discovery
8. Programmable RNA complex could speed genome editing in the lab
9. Rising carbon dioxide in atmosphere also speeds carbon loss from forest soils, IU-led research finds
10. ECGs administered by paramedics can speed treatment for severe heart attacks
11. Speed and power of X-ray laser helps unlock molecular mysteries
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Speed trap for fish catches domestic trout moving too slow
(Date:4/15/2016)... DUBLIN , April 15, 2016 ... of the,  "Global Gait Biometrics Market 2016-2020,"  report ... http://photos.prnewswire.com/prnh/20160330/349511LOGO ) , ,The global gait ... CAGR of 13.98% during the period 2016-2020. ... movement angles, which can be used to compute ...
(Date:3/31/2016)... BOCA RATON, Florida , March 31, 2016 /PRNewswire/ ... LEGX ) ("LegacyXChange" or the "Company") ... presentation for potential users of its soon to be ... The video ( https://www.youtube.com/channel/UCyTLBzmZogV1y2D6bDkBX5g ) will also ... by the use of DNA technology to an industry ...
(Date:3/23/2016)... 2016 Einzigartige ... und Stimmerkennung mit Passwörtern     ... MESG ), ein führender Anbieter digitaler Kommunikationsdienste, ... SpeechPro zusammenarbeitet, um erstmals dessen Biometrietechnologie einzusetzen. ... Möglichkeit angeboten, im Rahmen mobiler Apps neben ...
Breaking Biology News(10 mins):
(Date:5/27/2016)... ... 27, 2016 , ... Weeks after hosting a carpal tunnel syndrome workshop with ... surgeon and founder of the Fitzmaurice Hand Institute, has announced the addition of MRI ... state-of-the-art technology and only 1 of about 3 currently available in the United States. ...
(Date:5/26/2016)... May 26, 2016  Agriculture nutrients are in the ... Iowa is running their nitrate removal system ... Erie and coastal regions nationwide are painting ... this widespread issue. NECi Superior Enzymes, a ... Peninsula, developed a new, easy to use device that ...
(Date:5/26/2016)... ... May 26, 2016 , ... Kinder Scientific (KinderScientific.com), a leading ... position the Company for the future. Kinder Scientific announces restructured ownership and ... been appointed Chairman of the Board, Curtis D. Kinghorn has been appointed CEO/President ...
(Date:5/25/2016)... ... May 25, 2016 , ... ... became double board-certified in surgery and surgery of the hand by the National ... no stranger to going above and beyond in his pursuit of providing the ...
Breaking Biology Technology: