Navigation Links
Extreme winters impact fish negatively
Date:2/15/2013

Wcologists from Ume University and the Norwegian University of Science and Technology in Trondheim have studied fish communities and fish habitat and reviewed the importance of winter conditions for fish in streams and rivers in cold regions. The findings are now being published in the journal BioScience.

It is well known that winter can be a stressful season for plants and animals in streams and rivers. It is reasonable to assume that more extreme weather conditions are the most taxing, but the ecological significance of this is poorly understood.

The research team, headed by Professor Christer Nilsson at Ume University, describes how extreme conditions especially those associated with ice formation and ice break-up vary over time and affect both the non-living river environment and its fish. For example, streams can fill up with ice and kill all the fish that do not manage to flee to backwaters or stretches with deep, quiet water that is not filled with ice. Young fish are especially vulnerable.

The researchers also discuss how humans have impacted what happens in streams and rivers in the winter.

"Rivers that have been exploited for hydroelectric power can be especially hard for fish to live in, because the way hydropower is produced often means that the flow changes radically very quickly and often, which can lead to repeated ice break-ups and a great deal of anchor ice formation. When the ice cover at the surface disappears, cold air is fed downward in the water and forms ice crystals that cover the bottom, making it hard for fish to survive," says Christer Nilsson.

The scientists draw a number of conclusions from the study. One is that more measurements are needed in order to be able to predict when extreme situations in waterways may arise and that information about both the lives of different fishes and how they are affected by extreme events should be included in such data gathering. Another is
'/>"/>

Contact: Christer Nilsson
christer.nilsson@emg.umu.se
46-090-786-6003
Umea University
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Low rainfall and extreme temperatures double risk of baby elephant deaths
2. Global warming less extreme than feared?
3. University of Tennessee study predicts extreme climate in Eastern US
4. California is home to extreme weather, too
5. UK butterfly populations threatened by extreme drought and landscape fragmentation
6. Warming causes more extreme shifts of the Southern Hemispheres largest rain band
7. Research links extreme summer heat events to global warming
8. Newfound gene may help bacteria survive in extreme environments
9. Exome sequencing of health condition extremes can reveal susceptibility genes
10. Antioxidant shown to reduce blindness risk in extremely premature babies
11. AGU: Unique microbes found in extreme environment
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Extreme winters impact fish negatively
(Date:7/23/2014)... news release is available in German . ... and stability to cells, drive metabolic processes and transmit ... complex three-dimensional shapes. Scientists at the Max Planck Institute ... proteins can be constructed of similar amino acid chains ... that the proteins that exist today arose from common ...
(Date:7/23/2014)... BioCatch, the global leader in ... has been named in Gartner,s Market Guide for Online ... well-known Magic Quadrant for Web Fraud Detection. ... several vendors to deliver passive biometric analysis and predicted, ... feature of at least 30% of one-stop fraud detection ...
(Date:7/23/2014)... clinical use of induced pluripotent stem cell (iPSC) ... hindered by the risk of dysregulated cell growth, ... use etoposide treatment to halt teratoma formation in ... acute myocardial infarction, is demonstrated in an article ... peer-reviewed journal from Mary Ann Liebert, Inc., publishers. ...
Breaking Biology News(10 mins):Protein evolution follows a modular principle 2BioCatch Featured in Gartner's 2014 Online Fraud Detection Market Guide 2BioCatch Featured in Gartner's 2014 Online Fraud Detection Market Guide 3
... January 2014 Scientists from the Montreal Neurological ... two genes linked to hereditary Parkinson,s disease are ... The protective mechanism, which is reported in T ... arise from oxidative stress from mitochondria., "PINK1 and ...
... 21, JoVE, the Journal of Visualized Experiments , ... explored one of the most intriguing research questions facing ... protocol, titled Conducting Miller-Urey Experiments, is comprised of a ... Dr. Stanley Miller and Dr. Harold Urey in 1953. ...
... viral pathogen that typically infects plants has been found ... Researchers working in the U.S. and Beijing, China report ... journal of the American Society for Microbiology. The ... "resulted in the serendipitous detection of Tobacco Ringspot Virus, ...
Cached Biology News:Quality control of mitochondria as a defense against disease 2A 21st century adaptation of the Miller-Urey origin of life experiments 2Pathogenic plant virus jumps to honeybees 2
(Date:7/23/2014)... 23, 2014 StemGenex® , the ... the US aimed at improving the lives of patients ... study for Parkinson’s disease. StemGenex believes that a ... therapy are paramount when providing care to patients with ... stem cell therapy accessible to the millions of individuals ...
(Date:7/23/2014)... 2014 /PRNewswire/ - BioAmber Inc. (NYSE: ... chemicals, today announced that the underwriters of its common ... purchase an additional 420,000 shares of common stock ... share, less underwriting discounts and commissions, in connection ... 2,800,000 shares of common stock, bringing the expected ...
(Date:7/23/2014)... , July 23, 2014  GrowBLOX Sciences, Inc. (OTCQB: ... that it is filing for two medical marijuana dispensary locations ... are in addition to the Clark County, Nevada ... special use permit, as previously announced.  GrowBLOX Sciences, ... be submitting two new applications for dispensaries in the ...
(Date:7/23/2014)... With the ability to record continuously at over ... 15 minutes, Fastec Imaging has brought the same ease-of-use of ... “Finally, a high speed camera that can be used as ... lives.” proclaims Matt Kearney, VP of Sales for Fastec Imaging. ... and simplify the traditionally complicated workflow of a high speed ...
Breaking Biology Technology:StemGenex® Gives Hope to Parkinson’s Patients through New Stem Cell Clinical Study 2StemGenex® Gives Hope to Parkinson’s Patients through New Stem Cell Clinical Study 3BioAmber announces exercise in full of underwriters' option in connection with previously priced follow-on offering 2BioAmber announces exercise in full of underwriters' option in connection with previously priced follow-on offering 3GrowBLOX Sciences, Inc. Files for Two Additional Medical Marijuana Dispensaries in Las Vegas 2GrowBLOX Sciences, Inc. Files for Two Additional Medical Marijuana Dispensaries in Las Vegas 3Fastec Imaging Introduces the First High Speed Camcorder 2Fastec Imaging Introduces the First High Speed Camcorder 3
... /PRNewswire-FirstCall/ - On August 20, 2008,Oncothyreon Inc. (Nasdaq: ... a,letter from The Nasdaq Stock Market indicating that (i) ... on The NASDAQ Global Market,because it did not meet ... other things, that the market value of,its common stock ...
... with international ... and technology companies, TORONTO, Sept. 17 Aurillion, a ... Moreno as its vice president of sales and marketing. In ... grow the company,s business throughout the Americas, Europe,and Asia. He ...
... 17 Sigma-Aldrich Corporation,(Nasdaq: SIAL ) will be ... Wednesday, September 24th at 8:30 AM ET at the ... via live audio broadcast over the,Internet available at ... this file. For the webcast on, http://ir.sigmaaldrich.com users ...
Cached Biology Technology:Oncothyreon announces receipt of NASDAQ letter regarding compliance with NASDAQ Global Market listing standards 2Oncothyreon announces receipt of NASDAQ letter regarding compliance with NASDAQ Global Market listing standards 3Guillermo Moreno Named Aurillion's Vice President of Sales and Marketing 2
... Roches RTS AviTag E. coli Biotinylation Kit, Linear ... 100 E. coli expression kits. (Cat. No. 3 ... reagents to rapidly generate linear expression constructs by ... based on a combination of T7 RNA polymerase ...
... (GR) Competitor Assay Kits are ideal for ... The PolarScreen GR Competitor Assay Kits contain ... and one of the following proprietary fluorescent ... GS Red (red assay kit), or GS ...
... E. coli Biotinylation Kit, Plasmid is designed for ... coli expression kits. (Cat. No. 3 186 148, ... provides vectors for the easy introduction of a ... protein can be enzymatically mono-biotinylated by E. coli ...
... Exiqons LNA technology enables sensitive, fast ... on intact chromosomes. Short hybridisation ... fixed cells and chromosome spreads Multiplex ... Pre-validated probes Probes available ...
Biology Products: