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:11/21/2014)... , Nov. 19, 2014  Earlier this year ... York College, and one of the most prolific inventors ... that are transmitted from Smartphones to third party agencies. ... and has one of the earliest known patents in ... usage in the military, child care, elder care and ...
(Date:11/18/2014)... Nov. 18, 2014  The Secure Identity & ... today jointly announce the formation of The Airport ... its Identity and Biometric Entry and Exit ... received official support from BORDERPOL, the international non-profit ... and provide expertise regarding border security, traveler and ...
(Date:11/15/2014)... YORK , Nov. 13, 2014  While we may ... technology Doctor McCoy used in "Star Trek" to gain instant ... tools designed to work with smartphones and tablets for monitoring ... of the healthcare world. This may seem a tad Orwellian ... ready to adopt some of these technological opportunities into their ...
Breaking Biology News(10 mins):Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 2Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 4Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 2Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 3Americans May Be Ready for a Brave New World of Healthcare 2Americans May Be Ready for a Brave New World of Healthcare 3Americans May Be Ready for a Brave New World of Healthcare 4
... Plan enacted in 1993 was designed to conserve old-growth forests ... researchers conclude in a new study that it had another ... lands. When forest harvest levels fell 82 percent on ... act, they became a significant carbon "sink" for the first ...
... do the infectious protein particles called prions come from? ... such as mad cow/Creutzfeld-Jakob disease, in humans and animals. ... folded protein counterparts, but they usually need some kind ... University School of Medicine have identified a yeast protein ...
... the Gulf of Mexico following the Deepwater Horizon oil spill, ... at Texas Tech University have reported that only 8 to ... eggs resulted in a 50 percent mortality rate. However, ... at sea and exposed to weather had a significant effect ...
Cached Biology News:Northwest Forest Plan has unintended benefit - carbon sequestration 2Cellular stress can induce yeast to promote prion formation 2Deepwater Horizon crude less toxic to bird eggs after weathering at sea 2
(Date:12/13/2014)... December 12, 2014 Trend lines for ... overall global economic growth, Eugene Arthurs, CEO of ... said in a featured talk at OPTIC (Optics and ... the National Chung Hsing University in Taichung. , As ... into future energy supplies and soon to hit US$50 ...
(Date:12/13/2014)... 13, 2014 According to population studies: ... between now and 2030." If a population explosion like ... most populous state in the country. , To that ... the Future of North Carolina Forum on December 16th ... have the necessary infrastructure in place? Enough clean water? ...
(Date:12/13/2014)... -- Vermillion, Inc. (NasdaqCM: VRML), a bio-analytical solutions company focused on ... G. H. Jordan , Ph.D., and David R. ... the total number of directors to eight, seven of ... , Chairman, President, and Chief Executive Officer of Vermillion, ... of Veronica and David to our board of directors.  ...
(Date:12/13/2014)... , Dec. 12, 2014  Vaccinex Inc., ... discovery and development of therapeutic monoclonal antibodies ... announced publication of a manuscript entitled "SEMA4D ... remyelination in neurodegenerative disease" in the January ... Disease*.  The publication highlights an important role ...
Breaking Biology Technology:Photonics Continues Upward Trends Despite Challenges in the Global Economy, Notes SPIE CEO 2Photonics Continues Upward Trends Despite Challenges in the Global Economy, Notes SPIE CEO 3Photonics Continues Upward Trends Despite Challenges in the Global Economy, Notes SPIE CEO 4Photonics Continues Upward Trends Despite Challenges in the Global Economy, Notes SPIE CEO 5North Carolina Chamber of Commerce: Asking Questions & Gathering Answers with a Futurist 2Vermillion Strengthens Board of Directors with Appointments of Veronica Jordan, Ph.D., and David Schreiber 2Vermillion Strengthens Board of Directors with Appointments of Veronica Jordan, Ph.D., and David Schreiber 3Vaccinex announces publication of preclinical studies with an anti-SEMA4D antibody in animal models of neuroinflammatory and demyelinating disease 2
... U.S. Food and Drug Administration clears new implant for ... Innovations, Inc. (SBi),a single-source provider of products, technology and ... orthopedic industry, announced that its,Artelon(R) STT Spacer has been ... This product extends SBi,s line of surgically implanted, ...
... FRAZER, Pa., Sept. 21 Cephalon, Inc. (Nasdaq:,CEPH) ... Drug Application (NDA) to,the U.S. Food and Drug ... the treatment of patients with chronic,lymphocytic leukemia (CLL). ... disease with an estimated 15,000 new cases diagnosed ...
... CLARA, California, September 21, ChemAxon, a software solutions ... A ) today announced an,agreement to maintain the ... ChemAxon,s software suite. Agilent acquired,the Kalabie ELN from ... between Klee and ChemAxon to Agilent and ChemAxon. ...
Cached Biology Technology:Small Bone Innovations Introduces the Artelon(R) STT Spacer to Increase Treatment Options for Thumb Arthritis 2Small Bone Innovations Introduces the Artelon(R) STT Spacer to Increase Treatment Options for Thumb Arthritis 3Small Bone Innovations Introduces the Artelon(R) STT Spacer to Increase Treatment Options for Thumb Arthritis 4Small Bone Innovations Introduces the Artelon(R) STT Spacer to Increase Treatment Options for Thumb Arthritis 5Cephalon Submits New Drug Application for TREANDA for the Treatment of Chronic Lymphocytic Leukemia 2Cephalon Submits New Drug Application for TREANDA for the Treatment of Chronic Lymphocytic Leukemia 3Cephalon Submits New Drug Application for TREANDA for the Treatment of Chronic Lymphocytic Leukemia 4ChemAxon and Agilent Technologies Sign Agreement Extending JChem Integration With Kalabie Electronic Lab Notebook 2
... serum is extensively scrutinized, including ... All horses are of ... worming are controlled and documented ... consistency. Pricing: $12/unit ...
... new primer sets added in Dec 2005 ... hours , Detection from as little ... Specific primers available for hundreds of mammalian ... or end-point RT-PCR , Ideal for ...
jub, ajuba homolog (Xenopus laevis)...
Recommend to use at up to 5000X dilutions for cell culture (e.g. Add 1 ul to 1 ml of culture medium.)...
Biology Products: