Navigation Links
River damming leads to dramatic decline in native fish numbers
Date:7/9/2008

Damming of the Colorado River over the last century, alongside introduction of game fish species, has led to an extensive decline in numbers of native fish whilst introduced species have flourished. Scientists have found that physical changes which occur to a river when it is dammed have had an adverse effect only on native fish, due to differences in their life histories. Armed with this knowledge, they have made proposals to management agencies, which, if implemented, could reverse the loss of native species not only in the Colorado but on a country or even world-wide scale. Dr Alice Gibb from Northern Arizona University will be presenting her research on Thursday 10th July at the Society for Experimental Biology's Annual Meeting in Marseille [Session A4].

Dr Gibb and her colleagues believe that differences in the early life of native and introduced species can account for the recent changes in population dynamics. They measured 'escape responses' of both native and introduced species to predators under laboratory conditions. "Our studies have shown that the larvae of native fish, which are usually less developed when they hatch, have a poorer escape response, due to their lack of adult swimming appendages. In contrast, many introduced species can prey upon the native species, and produce larvae that are more morphologically mature at hatching and thus may themselves be better equipped to escape predation," she explains.

Changes that damming has imposed on the Colorado River environment have amplified the disadvantage that native species face, according to Dr Gibb. "Historically, the less-developed native larvae had a natural refuge from predators due to sediment suspended in the water, and water turbulence increased the ability of larvae to encounter the plankton that they feed on. Fish also rapidly outgrew their period of high-vulnerability to predation due to higher water temperatures," she declares. "Damming the Colorado Riv
'/>"/>

Contact: Holly Astley
hma25@cam.ac.uk
44-779-285-5259
Society for Experimental Biology
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Baiji Dolphin previously thought extinct spotted in the Yangtze River
2. UC Riverside biologist receives prestigious MacArthur Fellowship
3. International team of scientists warns of climate changes impact on global river flow
4. Stronger EPA leadership needed to improve water quality in Mississippi River
5. UC-Riverside partners with Chinese university to address Chinas environmental problems
6. X-effect: female chromosome confirmed a prime driver of speciation
7. Tiny fish can yield big clues to Delaware River health
8. Scientists from the UGR prove that rivers do not act as barriers for groundwater flow
9. More comprehensive analysis of Klamath River basin needed to aid decision makers
10. Chemicals used as fire retardants could be harmful, UC-Riverside researchers say
11. LSU, Yale team study agricultural impact on Mississippi River
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
River damming leads to dramatic decline in native fish numbers
(Date:8/22/2014)... German . ... are fixated in a way so as to align ... and Fudan University researchers are planning on looking into ... findings are being published today in the scientific journal ... sensitive molecules. Everyone knows that at least from ...
(Date:8/22/2014)... strong antioxidants and can reduce free radical ... against oxidative stress? Jianbo Zhao and co-workers ... Medical University, China discovered that green tea ... neuronal apoptosis, indicating green tea polyphenols play ... under oxidative stress. The relevant study has ...
(Date:8/22/2014)... In 2015, American consumers will finally be able to ... Although touted as zero-emissions vehicles, most of the cars ... fossil fuel that contributes to global warming. , Now ... device that uses an ordinary AAA battery to produce ... electric current through two electrodes that split liquid water ...
Breaking Biology News(10 mins):Proteins: New class of materials discovered 2Stanford scientists develop a water splitter that runs on an ordinary AAA battery 2Stanford scientists develop a water splitter that runs on an ordinary AAA battery 3
... human genetics at Baylor College of Medicine, first published her ... starvation, sometimes resulting in a rare change that benefited the ... current issue of the journal Molecular Cell, she and her ... that this only occurs at a special time and place ...
... prediction. , Computers can predict the detailed structure of ... least some of the time, according to new studies ... which were reported in the September 16, 2005, issue ... that scientists eventually may be able to determine the ...
... led by University of California, San Diego biochemists has ... produce 10 trillion varieties of a single protein, a ... drugs. , In the September 18 advance on-line publication ... researchers describe the mechanism by which a virus that ...
Cached Biology News:Stressed cells spark DNA repair missteps and speed evolution 2Computers close in on protein structure prediction 2Computers close in on protein structure prediction 3Computers close in on protein structure prediction 4UCSD discovery may provide novel method to generate medically useful proteins 2UCSD discovery may provide novel method to generate medically useful proteins 3
(Date:8/22/2014)... the University of Surrey have discovered how the receptors ... clock genes. , The new study, published today in ... clock activity in turn regulates the cycle of all ... discovered that the local biological clock and its control ... the clock in bladder physiology and ageing. ...
(Date:8/22/2014)... are intensively investigated for application as catalysts, ... and components in photonics and molecular electronics. ... for understanding physical and chemical properties, has ... USA, have demonstrated that high-resolution electron microscopy ... structure in which all gold atoms are ...
(Date:8/22/2014)... Research and Markets has announced ... Permeation Chromatography (GPC) Industry Report 2014" report to ... Gel Permeation Chromatography (GPC) Industry Report is a professional ... global gel permeation chromatography industry with a focus on ... overview of the industry including definitions, classifications, applications and ...
(Date:8/22/2014)... 2014 Nerium International, the go-to, ... the spotlight again. Nerium will showcase its signature ... Body Contouring Cream to Hollywood’s elite at the ... the 66th Primetime Emmy® Awards. , Developed from ... clinical trials show that NeriumAD night cream dramatically ...
Breaking Biology Technology:Treatment for overactive bladder and irritable bowel syndrome advanced through pioneering research 2A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy 2Global and China Gel Permeation Chromatography (GPC) Industry Report 2014 2Nerium International Joins Television’s Biggest Stars at Backstage Creations Giving Suite at the 66th Primetime Emmy Awards 2Nerium International Joins Television’s Biggest Stars at Backstage Creations Giving Suite at the 66th Primetime Emmy Awards 3
... Nectid, Inc. ( www.nectid.com ) announced today that ... patents and patents-applications to Grunenthal GmbH ( www.grunenthal.com ), ... in pain drug discovery and research. The patent portfolio ... Pain Drug Discovery program and two key drug delivery ...
... , COLUMBUS, Ohio Engineers at Ohio State University have ... from nine different angles at once to create a 3D ... that move around an object; the new lens is the ... itself. Allen Yi, associate professor of integrated systems engineering ...
... NEW YORK, March 21, 2011 Reportlinker.com announces ... available in its catalogue: ... http://www.reportlinker.com/p0459142/Global-Angiongenesis-Inhibitors-and-Stimulators-Industry.html ... Angiogenesis Inhibitors and Stimulators in US$ Million ...
Cached Biology Technology:Seeing in stereo: Engineers invent lens for 3-D microscope 2Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 2Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 3Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 4Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 5Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 6Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 7Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 8Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 9Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 10Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 11Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 12Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 13Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 14Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 15Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 16Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 17
...
Improve inventory management with stainless steel red cell canisters; ensure product safety with CO2 or LN2 backup systems. A complete solution for your blood banking needs....
... oligonucleotides: PTOs are internucleotide modifications, ... backbone is replaced by a sulphur atom. ... degradation. PTOs are available as ... Oligonucleotides with thio-caps ...
Improve inventory management with stainless steel red cell canisters; ensure product safety with CO2 or LN2 backup systems. A complete solution for your blood banking needs....
Biology Products: