Navigation Links
Transporting juvenile salmon hinders adult migration
Date:12/5/2008

Scientists have discovered that management efforts intended to assist migrations of salmon and steelhead trout can have unintended consequences for fish populations. Juveniles that are transported downstream on boats can lose the ability to migrate back to their breeding grounds, reducing their survivorship and altering adaptations in the wild.

Transportation programs have been in place for over three decades to improve the survival of fish that hatch in rivers but migrate downstream to the ocean, where they live most of their adult lives. Adults then swim back up the river to mate, lay eggs and finally die in the same area where they were born. These fish can travel hundreds of miles and make dramatic ascensions up waterfalls and past dams.

When dams block rivers, however, the migrating fish especially juveniles can have a tough time traveling between their spawning grounds and the open ocean.

"Juveniles trying to get back to sea usually go over the spillways or past the dam's turbines," says Matthew Keefer, a biologist at the University of Idaho and the lead author on the study, which appears in the November issue of Ecological Applications.

Going past a dam's turbines, however, can kill many young fish. In response, management efforts help salmon and steelhead trout avoid dams altogether by transporting juveniles past dams toward the ocean on river-faring barges.

But Keefer has found that this free ferry ride can create problems when the juveniles grow up. He and his colleagues Christopher Caudill, Christopher Peery and Steven Lee at the University of Idaho tracked the movement patterns of adult salmon and steelhead trout along the Columbia and Snake rivers in Washington and Oregon. They found that, when compared to fish that migrated naturally, transported juveniles had lower survivorship as adults and were less likely to find their way home.

"Adult fish usually move steadily upstream tow
'/>"/>

Contact: Christine Buckley
christine@esa.org
202-833-8773
Ecological Society of America
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Transporting broiler chickens could spread antibiotic-resistant organisms
2. Bayhill Therapeutics and the Juvenile Diabetes Research Foundation announce research collaboration
3. Salmon garnish points the way to green electronics
4. New paper examines dams effects on California salmon
5. Salmonid hatcheries cause stunning loss of reproduction
6. Understanding, combating foodborne pathogens E. coli 0157 and salmonella
7. UW launches cutting-edge DNA fin-printing project for salmon
8. Fish farms drive wild salmon populations toward extinction
9. Unfavorable ocean conditions likely cause of low 2007 salmon returns along West Coast
10. Hatchery fish outnumber wild chinook salmon in troubled fall run
11. Fruit flies show how salmonella escapes immune defenses
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2014)... and plant life, but there,s an invisible machine underground. ... soil, decomposing organic matter and releasing carbon into the ... in ecological systems, their identities have only now been ... genetic map of more than 10,000 species of fungi ... in the Proceedings of the National Academy of ...
(Date:4/17/2014)... View of Domestication," a special feature of The ... ( PNAS ) published April 29, raises a ... deep history that most of us take for granted. ... in many spots around the globe shifted from hunting ... and plants. , It seems so straightforward and yet ...
(Date:4/16/2014)... forgotten in museum collections two new species of yellow-shouldered bats have ... and The Field Museum of Natural History and described in the ... additions to the genus Sturnira are part of a ... world, the third one still waiting to be officially announced. , ...
Breaking Biology News(10 mins):Stanford biologists help solve fungal mysteries 2Stanford biologists help solve fungal mysteries 3Genetic study tackles mystery of slow plant domestications 2Genetic study tackles mystery of slow plant domestications 3Genetic study tackles mystery of slow plant domestications 4Two new species of yellow-shouldered bats endemic to the Neotropics 2
... When investigating cancer cells, researchers discovered numerous peculiarities: ... genes are overactive. Do these characteristics have a relation ... inactivate growth brakes or are they just a whim ... scientists perform what are called loss-of-function analyses. They knock ...
... the University of Hawaii Cancer Center and The Queen,s ... from the National Cancer Institute to develop novel methods ... analysis of gene expression and imaging data of the ... a research scientist at the UH Cancer Center, and ...
... An extreme form of pregnancy-related nausea and vomiting known ... of women each year and can lead to hospitalization and ... the only victims. A joint study by ... children whose mothers suffered from HG while carrying them were ...
Cached Biology News:A question of gene silencing 2Hawaii receives funding for liver cancer research 2Extreme morning sickness could lead to lifelong emotional, behavioral disorders in kids 2
(Date:1/14/2014)... Date: Friday, April 11, 2014 , Time: 6 ... Almshouse Road, Warrington, Pa. , Details: The Hepatitis ... finding a cure for hepatitis B and improving the quality ... Crystal Ball on Friday, April 11 at Warrington Country Club ...
(Date:1/14/2014)... 2014  3D Communications, a leading provider of strategic communications services to ... events in the United States and ... Cox , JD, is returning to the firm,s Washington, ... 3D after more than two years of service as Associate Commissioner ...
(Date:1/14/2014)... Jan. 14, 2014 The largest international professional ... plants and therapeutic derivatives thereof has endorsed an ... researchers about the challenges of adulterated herb and ... The Society for Medicinal Plant ...
(Date:1/14/2014)... January 14, 2014 In recent years, ... and methods in product development and promotion has led ... This mistrust, fueled by concerns about the insidious impact ... reports of spectacular fines to the world’s biggest pharmas ...
Breaking Biology Technology:Hepatitis B Foundation to Host Annual Crystal Ball Gala 2Former FDA Associate Commissioner Returns To 3D Communications 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 3World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 4World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 5World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 6World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 7World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 8The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3
... Celebrated at Event in ... Hong Kong, ... announced that the leading China biometrics company Miaxis,Biometrics Co., Ltd has ... Asia, 2007 awards. The news has been,announced at a gala dinner ...
... Leading neurosurgical device,developer Elekta will feature the ... along with clinical workflow solutions,that make neurosurgery ... of Neurosurgical Societies (EANS) European Congress September,2-7, ... medical professionals,will gather at the Scottish Exhibition ...
... at the National Institute of Standards and ... tools to help correct and validate the ... based on fluorescence. , Recent years ... development and use of fluorescence-based analytic techniques. ...
Cached Biology Technology:Miaxis Biometrics Named as 'Red Herring 100 Asia' Award Winner for 2007 2Miaxis Biometrics Named as 'Red Herring 100 Asia' Award Winner for 2007 3Elekta Demonstrates Commitment to Stereotactic Innovation at EANS 2Elekta Demonstrates Commitment to Stereotactic Innovation at EANS 3Elekta Demonstrates Commitment to Stereotactic Innovation at EANS 4Fluorescent glass SRMs are new tool for spectroscopy 2
... Overhead Drive for individual and parallel agitation ... agitation of DASGIP vessels, featuring range of ... ,Up to 16 overhead drives can be ... Systems fedbatch-pro® and cellferm-pro® for microbiology and ...
The LAS-3000 imaging system combines new CCD camera technology with a simplified user interface to provide significantly improved system sensitivity with a wide range of modularities. This system is...
... your Ion Chromatography requirements, IonQuest will ... The newly developed conductivity detector has ... . In addition to the standard ... with other detectors, such as electrochemical, refractive ...
Capture faint-light images without losing sensitivity or resolution. With its brand new hardware and interface design, the LAS-1000plus turns sample imaging into a simple process....
Biology Products: