Navigation Links
Plunging fish numbers linked to dam releases
Date:6/11/2013

A significant decline in the numbers of native fish in Australia's Murray-Darling Basin may be linked to released dam water being too cold for breeding.

This is just one of the findings from a Griffith University led study which found current water releases back into the Murray-Darling system limit fish reproduction and therefore impact freshwater biodiversity.

Griffith University Research Fellow Dr Rob Rolls said the results, published in Freshwater Biology, throw cold water on the notion that large dam releases compensate for the effects of interrupting natural water flows. And it's not just seasonal flooding which is important; the natural low flow periods matter too.

"Golden perch an iconic species that significant value for recreational fishing and it is often assumed that large floods are necessary to initiate spawning and recruitment of golden perch and many other fish," Dr Rolls said.

"But we found that more than 90% of golden perch juveniles occurred in unregulated lowland rivers in the northern Murray-Darling Basin, which naturally stop flowing for weeks or months, while regulated reaches now flow constantly.

"Restoring these natural low flow periods is critical because it is these shallow, warm reaches of waterways which produce the food fish depend upon."

The team also found that releases from the Pindari Dam on the Severn River did not encourage fish spawning because the water is much colder compared with nearby unregulated rivers.

"Stream temperature has a significant effect on spawning opportunities for fish, and cold water released from the bottom of dams may limit the benefits of environment flows," Dr Rolls said.

"The negative impact of this could be minimised by modifying dams so the warmer water from the surface of reservoirs is released rather than from the bottom."


'/>"/>

Contact: Helen Wright
helen.wright@griffith.edu.au
61-047-840-6565
Griffith University
Source:Eurekalert

Page: 1

Related biology news :

1. UGA study finds theres not always safety in numbers when it comes to extinction risk
2. Fighting bacterias strength in numbers
3. New report puts real numbers behind history of oyster reefs
4. Safer spinach? Scientists technique dramatically reduces E. coli numbers
5. Scientists develop novel method to study parasite numbers in wild seabirds
6. Reducing numbers of 1 carnivore species indirectly leads to extinction of others
7. Recipe for large numbers of stem cells requires only one ingredient, says NIH/Pitt team
8. Women altering menstruation cycles in large numbers, UO study shows
9. Exposure to antibiotics linked to severity of allergic asthma: UBC research
10. Autism risk gene linked to differences in brain structure
11. Spontaneous gene glitches linked to autism risk with older dads
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/30/2014)... North Carolina State University researchers have developed a suite ... between dogs and humans, which has applications in everything ... our pets. , "We,ve developed a platform for computer-mediated ... to new avenues for interpreting dogs, behavioral signals and ... Dr. David Roberts, an assistant professor of computer science ...
(Date:10/29/2014)... by unconventional oil and gas production are well over ... the open access journal Environmental Health . High ... The study is the first to be based on ... and could be used to supplement official air-quality monitoring ... that do not readily flow to the surface. This ...
(Date:10/29/2014)... (October 29, 2014, Beaverton, OR) New research ... 11th International Conference in Houston, TX showed for ... eliminate HPV infection in women using a readily ... The study, presented by Dr. Judith A. Smith, ... Gynecology and Reproductive Sciences at The University of ...
Breaking Biology News(10 mins):New tech aims to improve communication between dogs and humans 2Air quality and unconventional oil and gas sites 2Air quality and unconventional oil and gas sites 3HPV infections in women eradicated by AHCC, Japanese mushroom extract 2
... at the University of Warwick's plant research arm Warwick ... develop a butterfly farming industry in Guyana that will ... help save the rainforest itself. , The University of ... for Rain Forest Conservation in Guyana. The conservation reserve ...
... A massive dinosaur death bed in Alberta has helped map ... theories about how one species lived, says new research conducted ... the surprises to me was that the overall pattern of ... catastrophic model we were expecting," said world-renowned paleontologist Dr. Phillip ...
... The regions in robins' brains responsible for singing and mating ... new University of Alberta research--the first proof that natural exposure ... , "These residues have been persisting since the late ... post-doctoral research fellow in the U of A's Department of ...
Cached Biology News:Butterfly farming to help save rain forest 2Tyrannosaur survivorship -- tough times for teens 2Bird brains shrink from exposure to contaminants 2
(Date:10/30/2014)... On October 26th at the Mid ... leading applied stem cell research scientist Neil Riordan, ... talks on New Techniques for Enhancing Stem Cell ... Cells. , Dr. Riordan focused on historical medical ... AlphaGEMS that include: wound healing; inflammation and pain ...
(Date:10/30/2014)... Diego, CA (PRWEB) October 30, 2014 ... announced today that they have manually curated public data ... and non profit customers. the data is now ... manually curates and unifies public and internal data sources ... value and knowledge out of the data that becomes ...
(Date:10/30/2014)... Ottawa, Ontario (PRWEB) October 30, 2014 ... the Spartan RX CYP2C19 System . It detects ... a non-invasive cheek swab. , The Spartan RX CYP2C19 ... medicine that has been approved in Canada. Due to ... that it may be used by healthcare professionals such ...
(Date:10/30/2014)... (PRWEB) October 30, 2014 Avure Technologies celebrates ... 525L, the newest member of its fleet of high volume ... reaching an anniversary as we return to PackExpo this year, ... ago in Las Vegas,” said Jeff Williams, CEO at Avure. ... and we’re pleased to be meeting the challenges of market ...
Breaking Biology Technology:Riordan-McKenna Institute Founders, Neil Riordan, PhD and Orthopedic Surgeon, Dr. Wade McKenna Present at the Mid American Regenerative and Cellular Medicine Showcase 2Riordan-McKenna Institute Founders, Neil Riordan, PhD and Orthopedic Surgeon, Dr. Wade McKenna Present at the Mid American Regenerative and Cellular Medicine Showcase 3Riordan-McKenna Institute Founders, Neil Riordan, PhD and Orthopedic Surgeon, Dr. Wade McKenna Present at the Mid American Regenerative and Cellular Medicine Showcase 4Rancho BioSciences Manually Curated TCGA Data Sets Available 2Health Canada approves first near-patient DNA test for personalized medicine 2Health Canada approves first near-patient DNA test for personalized medicine 3In High Demand: New High Pressure Processing (HPP) System with Maximum Throughput Drives Strong Sales 2In High Demand: New High Pressure Processing (HPP) System with Maximum Throughput Drives Strong Sales 3
... McCormick School of Engineering and Applied Science at Northwestern ... of probe used in atomic force microscopy (AFM), which ... Using diamond, researchers made a much more durable ... are typically used in AFM to gather information from ...
... YM BioSciences Inc. (NYSE Amex: YMI, TSX: YM), a ... a diverse portfolio of promising cancer-related products at various ... for the first quarter of fiscal 2010, ended September ... continued to advance our lead drug nimotuzumab, which is ...
... KVISTGARD, Denmark, November 11 Today Bavarian Nordic published ... including the financial statements is available on the company,s ... months of 2009 Bavarian Nordic generated revenue of DKK ... DKK 261 million. As of 30 September 2009 the ...
Cached Biology Technology:New nanocrystalline diamond probes overcome wear 2YM BIOSCIENCES REPORTS FISCAL FIRST QUARTER 2010 OPERATIONAL AND FINANCIAL RESULTS 2YM BIOSCIENCES REPORTS FISCAL FIRST QUARTER 2010 OPERATIONAL AND FINANCIAL RESULTS 3YM BIOSCIENCES REPORTS FISCAL FIRST QUARTER 2010 OPERATIONAL AND FINANCIAL RESULTS 4YM BIOSCIENCES REPORTS FISCAL FIRST QUARTER 2010 OPERATIONAL AND FINANCIAL RESULTS 5YM BIOSCIENCES REPORTS FISCAL FIRST QUARTER 2010 OPERATIONAL AND FINANCIAL RESULTS 6YM BIOSCIENCES REPORTS FISCAL FIRST QUARTER 2010 OPERATIONAL AND FINANCIAL RESULTS 7YM BIOSCIENCES REPORTS FISCAL FIRST QUARTER 2010 OPERATIONAL AND FINANCIAL RESULTS 8YM BIOSCIENCES REPORTS FISCAL FIRST QUARTER 2010 OPERATIONAL AND FINANCIAL RESULTS 9YM BIOSCIENCES REPORTS FISCAL FIRST QUARTER 2010 OPERATIONAL AND FINANCIAL RESULTS 10YM BIOSCIENCES REPORTS FISCAL FIRST QUARTER 2010 OPERATIONAL AND FINANCIAL RESULTS 11YM BIOSCIENCES REPORTS FISCAL FIRST QUARTER 2010 OPERATIONAL AND FINANCIAL RESULTS 12Bavarian Nordic A/S - Interim Report for the Period 1 January to 30 September 2009 2Bavarian Nordic A/S - Interim Report for the Period 1 January to 30 September 2009 3Bavarian Nordic A/S - Interim Report for the Period 1 January to 30 September 2009 4Bavarian Nordic A/S - Interim Report for the Period 1 January to 30 September 2009 5
Bethyl Laboratories packages antibodies, conjugates and calibrators to provide quantitative ELISA kits. Each kit contains the following components, sufficient for 1000 single well assays....
QML offers standard and customized paraffin embedded tissue blocks....
... include: ,ISH Protocol Development ,Probe ... ,RNA and DNA Screenings in ... Tissues ,Double Labeling of RNA ... Tissues ,RNA and DNA Localization ...
... involves the optimization of immunostaining. ... of the primary antibody, selection ... (e.g. Alk. Phos., HRP, fluorescence, ... detection, evaluation by light or ...
Biology Products: