Navigation Links
Similar survival rates for Pacific salmon in Fraser, Columbia Rivers raises new questions
Date:10/27/2008

Canadian and U.S. researchers have made a surprising discovery that some endangered Pacific salmon stocks are surviving in rivers with hydroelectric dams as well as or better than in rivers without dams.

This is the first study of its kind and is carried out by an international team of scientists that includes researchers from the University of British Columbia. Their findings will appear in the October 28 issue of the open access journal PLoS Biology, published by the Public Library of Science.

The team compared the survival rates of out-migrating, juvenile spring Chinook and steelhead salmon from two river basins: the heavily dammed Snake and Columbia Rivers and the free-flowing Thompson and Fraser Rivers both critical spawning grounds for numerous salmon species.

Using technology that has only recently been available, the team electronically tagged juvenile salmon (smolts) and monitored their journey from freshwater into the ocean via a large-scale acoustic telemetry system called the Pacific Ocean Shelf Tracking (POST) array.

"It came as quite a surprise to us that the Fraser River salmon populations studied have lower survival than the Columbia River study populations," says Erin Rechisky, one of the study authors and a PhD Candidate in the UBC Dept. of Zoology.

Rechisky stresses that there is not yet sufficient evidence to reach any conclusions. "Clearly dams are not good for salmon. What is unclear is whether the Fraser River has a problem that cuts salmon survival to that of a heavily dammed river, or whether factors other than dams play a larger, unsuspected role in salmon survival."

Only in recent years have acoustic tags become small enough for scientists to implant them into juvenile salmon and track them as they migrate downstream. These innovations enabled the team to gather data on salmon smolts in the Fraser River. Before that, it was only possible to measure juvenile survival wher
'/>"/>

Contact: Lorraine Chan
lorraine.chan@ubc.ca
604-822-3213
University of British Columbia
Source:Eurekalert

Page: 1 2

Related biology news :

1. Gene associated with pair-bonding in animals has similar effects in human males
2. Telepathic genes recognize similarities in each other
3. Mountain summits in the Alps becoming increasingly similar
4. Club drugs inflict damage similar to traumatic brain injury
5. Purdue research finds similarities in dog, human breast cancer pre-malignant lesions
6. Of mice and men: similarities between skeletons of both
7. Influence of sex and handedness on brain is similar in capuchin monkeys and humans
8. U of MN study shows link between gene variations and cancer survival
9. Second lumpectomy for breast cancer reduces survival rates
10. The IMF says journal editorial documents dramatic increase in survival since the 1980s
11. International team reveals first prognosticator of survival in aggressive cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2014)... honeybees in Europe, Asia and the United States are ... be impacting native honeybee populations at this time, according ... include including Nosema microsporidia and Varroa ... resilient to these invasive pests, which suggests to us ... Asia and the United States currently are not necessary ...
(Date:4/17/2014)... stark warning on the possible effects of gases such ... times that of carbon dioxide. Now a team of ... fully regenerable electron acceptors which helps explain why large ... being released to the atmosphere. However, there are worries ... into a vicious cycle to release large amounts of ...
(Date:4/17/2014)... Medical Branch at Galveston are the first to ... cervical cancer should begin colorectal cancer screening earlier ... finding a high incidence of secondary colorectal cancers ... new recommendations that the younger women in this ... after their initial cervical cancer diagnosis instead of ...
Breaking Biology News(10 mins):East African honeybees are safe from invasive pests… for now 2East African honeybees are safe from invasive pests… for now 3Methane climate change risk suggested by proof of redox cycling of humic substances 2Radiation therapy for cervical cancer increases risk for colorectal cancer 2
... The National Science Foundation has awarded Iowa State ... million grant to establish the NSF Engineering Research ... The award is part of the National ... Program. The third-generation Engineering Research Centers are designed ...
... utilize small, short-lived animals (insects, worms, mice) under ... parasites, superabundant food in the laboratory. Oddly ... such animals in their harsh, stressful natural environments. ... actually age much more slowly in captive luxury ...
... Bats, ability to echolocate may have evolved more than once, ... of London scientists. Species of bat with the ability ... tree of life - some are more related to their ... of whether echolocation in bats has evolved more than once, ...
Cached Biology News:Iowa State wins $18.5M grant to create NSF Center for Biorenewable Chemicals 2Iowa State wins $18.5M grant to create NSF Center for Biorenewable Chemicals 3Iowa State wins $18.5M grant to create NSF Center for Biorenewable Chemicals 4Old before their time? Aging in flies under natural vs. laboratory conditions 2Molecular evolution is echoed in bat ears 2
(Date:1/15/2014)... VA (PRWEB) January 15, 2014 Two ... have continued their sponsorship of an annual competition for ... in, and access to, innovative STEM study. The competition ... TEAMS: Tests of Engineering Aptitude, Mathematics, and Sciences ...
(Date:1/15/2014)... 15, 2014 2013 was a banner ... State Technologies®. They saw continued independent research led by ... were awarded a $1 million grant from the Susanne ... and Behavior” a peer reviewed journal, Amy Grant highlighted ...
(Date:1/15/2014)... Biotechnology Company, Limited ("TaiGen") today announced that they have ... pharmaceutical company, to develop and commercialize nemonoxacin (Taigexyn ® ... Turkey and other members of ... for the treatment of bacterial infections including those caused ...
(Date:1/14/2014)... Histogen, Inc., a regenerative medicine company ... under simulated embryonic conditions, today announced that they have ... Inc. for physician-dispensed aesthetic products containing Histogen’s proprietary multipotent ... is an amendment to the existing license between Histogen ...
Breaking Biology Technology:Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 2Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3
... Alliance, an,organization comprised of 12 of the nation,s best ... million Americans to exercise,their power over cancer by stepping ... Day through Father,s Day., The campaign, dubbed the ... activate Americans everywhere to take matters into their own,hands, ...
... Genaera,Corporation (Nasdaq: GENR ) today announced its financial ... for the quarter ended March 31,2008 was $4.3 million, or ... loss of $4.2 million, or $(0.24) per basic and diluted ... and development expenses for the quarter ended March,31, 2008 were ...
... ,Shire plc (LSE: SHP, NASDAQ: SHPGY), the global ... scheme of,arrangement proposed in a circular to shareholders ... a meeting convened by the Court and,held today., ... 2008, the High Court is expected to,approve the ...
Cached Biology Technology:Moffitt Cancer Center Joins National Campaign To Implore Americans To Donate $1 To Accelerate Cancer Research 2Genaera Corporation Announces First Quarter Financial Results 2Genaera Corporation Announces First Quarter Financial Results 3Genaera Corporation Announces First Quarter Financial Results 4Results of Court Meeting and Extraordinary General Meeting - Shareholders Approve Scheme of Arrangement and New Share Plans 2Results of Court Meeting and Extraordinary General Meeting - Shareholders Approve Scheme of Arrangement and New Share Plans 3Results of Court Meeting and Extraordinary General Meeting - Shareholders Approve Scheme of Arrangement and New Share Plans 4Results of Court Meeting and Extraordinary General Meeting - Shareholders Approve Scheme of Arrangement and New Share Plans 5
... 200 IS System is ideal for developing ... reagents. This system contains the new, improved, ... Luminex. The user can design specific templates ... system has fully integrated graphing and data ...
... The GeneSwitch Cell Lines stably express ... Each cell line is functionally tested ... with the expression control vector pGene/V5-His/lacZ ... after treatment with mifepristone (Figure 1). ...
... 15-20 enhancements when used as directed, ... is designed to amplify the desired signal detected by ... proteins with low expression., Membrane Enhancement ... the membrane; 1x solution; 250 ml, ...
... library screening, optimal siRNA transfection ... verified for each cell type ... Transfection Optimization Kit, which was ... conditions in 96 well plates, ...
Biology Products: