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:7/21/2015)... , July 21, 2015 Passwords have ... seen in the recent U.S. Office of Personnel ... to the infosec conundrum, but developers and end-users ... To address this dilemma, Biometrics-as-a-Service provider HYPR Corp. ... Tokenization SDK for third party integration. ...
(Date:7/9/2015)... , July 07, 2015 ... announced the addition of the "Biometrics for ... Forecasts 2015-2020" report to their offering. ... major contributor to this growth and the forecast ... billion in revenue for companies involved in delivering ...
(Date:7/8/2015)... DIEGO , July 8, 2015  Trovagene, ... cell-free molecular diagnostics, today announced the launch of ... the Company,s Precision Cancer Monitoring℠ (PCM) technology for ... receiving one or a combination of the novel ... Opdivo® (nivolumab), a PD-1 inhibitor. The 50-patient study ...
Breaking Biology News(10 mins):HYPR Corp. Launches Industry First Biometric Tokenization Platform 2HYPR Corp. Launches Industry First Biometric Tokenization Platform 3HYPR Corp. Launches Industry First Biometric Tokenization Platform 4Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 2Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 3Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 2Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 3Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 4
... a form of breast cancer known as estrogen receptor positive ... the treatment and prevention of recurring breast cancer. Currently, ... dose is prescribed for every patient. New research at ... patient-specific genetic factors, lack of exposure to vitamin D during ...
... DNA code for a complex region of the human genome ... Fraser University, chart new territory in immunity research. , They ... how well they operate and, potentially, what they fight off, ... drugs, treatments and vaccinations are designed to treat whole populations ...
... the Bellvitge Biomedical Research Institute (IDIBELL) and the Catalan ... study of seven missense variants of the BRCA1 gene ... to the risk of suffering breast or ovarian cancer. ... PLoS One The classification of these three ...
Cached Biology News:Cold winters freezing out breast cancer treatment 2Scientists find ethnicity linked to antibodies 2Identified as responsible for breast and ovarian hereditary cancer 3 mutations at BRCA1 gene 2
(Date:8/4/2015)... PORTLAND, Oregon , August 4, 2015 /PRNewswire/ ... published by Allied Market Research, titled, "World Cardiac ... global cardiac biomarker market would generate the revenue ... of 18.9% from 2015 to 2020. Cardiac Troponins ... throughout the forecast period due to high sensitivity ...
(Date:8/4/2015)... ... August 04, 2015 , ... ... diagnostic tests – today announced that Robert A. Gregg, PhD, has joined RPS ... than 30 years of relevant experience and remarkable achievements in the medical device ...
(Date:8/4/2015)... Aug. 4, 2015  Blueprint Medicines (NASDAQ: BPMC ... kinase drugs for genomically defined diseases, today announced that ... a company overview at the 2015 Wedbush PacGrow Healthcare ... EDT. A live webcast of the event ... the Blueprint Medicines website at www.blueprintmedicines.com . An ...
(Date:8/4/2015)... Francisco, CA (PRWEB) , ... August 04, 2015 , ... ... difference by inviting a diverse selection of entrepreneurs from across the United States to ... CEO Jessica Richman is honored to be chosen to be among the attendees. , ...
Breaking Biology Technology:Cardiac Biomarker Market is Expected to Reach $2,085.9 Million by 2020 2Cardiac Biomarker Market is Expected to Reach $2,085.9 Million by 2020 3Cardiac Biomarker Market is Expected to Reach $2,085.9 Million by 2020 4Cardiac Biomarker Market is Expected to Reach $2,085.9 Million by 2020 5RPS Diagnostics Welcomes Robert Gregg as Senior Vice President of Clinical and Regulatory Affairs 2RPS Diagnostics Welcomes Robert Gregg as Senior Vice President of Clinical and Regulatory Affairs 3White House Invites uBiome CEO Jessica Richman to First-Ever Startup Demo Day 2
... Electronic health record systems generally are perceived to have ... more clinics consider moving from paper charts to EHR ... barriers to entry. , ,The evolution of systems for ... robust data security has prompted more hospitals and ...
... - Just six weeks after taking the helm at ... to pursue opportunities in the private sector, the organization announced. ... has served as general counsel to WiCell's parent, the ... high-tech and biotechnology industries. , ,Donley, who joined WARF in ...
... An education research team at the University of Wisconsin-Madison ... to study the impact of digital media on youth ... investment will support 24 national studies of different aspects of ... , ,"What MacArthur is actually trying to do, with this ...
Cached Biology Technology:GE Healthcare launches hybrid electronic record 2Donley resigns as WiCell director 2UW gets $3M to explore educational gaming 2UW gets $3M to explore educational gaming 3
...
UltraPure DNase/RNase-Free Distilled Water is designed for use in all molecular biology applications. It is 0.1-m membrane-filtered and tested for DNase and RNase activity....
...
Water Distilled (Gibco™) is membrane filtered and endotoxin screened....
Biology Products: