Navigation Links
Climate change has surprising effect on endangered naked carp

Forthcoming in the January/February 2007 issue of Physiological and Biochemical Zoology, a groundbreaking study reveals an unanticipated way freshwater fish may respond to water diversion and climate change. Endangered naked carp migrate annually between freshwater rivers, where they spawn, and a lake in Western China, where they feed and grow. However, Lake Qinghai is drying up and becoming increasingly more saline--leading to surprising adjustments to the carps' metabolic rate.

Naked carp take seven to ten years to reach reproductive size. Although historically abundant, overfishing and destruction of spawning habitat through dam-building caused the species to become endangered during the 1990s. Diversion of water for agriculture from the lake has been compounded by climate change, leading to a decline in water level in the lake of 10?2 cm per year during the past fifty years (see accompanying image).

However, Chris M. Wood (McMaster University) and coauthors found that naked carp respond to the increased salinity of the lake water in a surprising way--by taking a "metabolic holiday." In the first forty-eight hours after transitioning from the freshwater river system to lake water, the carps' oxygen consumption falls --eventually reaching just 60 percent of that in river fish.

Both gill and kidney functions also decline. The sodium/potassium pump (Na+/K+-ATPase), which is a protein critical for cellular function, operated at only 30 percent of its capacity in lake-water fish compared to river-water fish. Ammonia-N secretion by the kidneys declines by a surprising 70 percent, and urine flow decreases drastically to less than 5 percent of its rate in the freshwater river water.

"In other words, the kidney changed from an organ which excreted water at a greater rate than salt in river-water, to one which conserved water relative to salt in lake-water," explain the researchers.

Long-term lake-water-acclimated fish a
'"/>

Source:University of Chicago Press Journals


Page: 1 2

Related biology news :

1. Climate model links higher temperatures to prehistoric extinction
2. Climate change will affect carbon sequestration in oceans, model shows
3. Climate change: The rice genome to the rescue
4. Climate change drives widespread amphibian extinctions
5. Climate experts search for answers in the oceans
6. Climate change creates dramatic decline in red-winged black bird population
7. Climate change could trigger boom and bust population cycles leading to extinction
8. Climate change impacts stream life
9. Climate change was the cause of Neanderthal extinction in the Iberian Peninsula
10. Elusive HIV shape change revealed; Key clue to how virus infects cells
11. Researchers trace evolution to relatively simple genetic changes
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Climate change has surprising effect endangered naked carp

(Date:5/21/2013)... a "patient monitoring" device attached to a whale entangled ... how fishing lines changed a whale,s diving and swimming ... ability to eat and migrate, depletes their energy as ... result in a slow death. , The scientists in ... Dtag to a two-year-old female North Atlantic right whale ...
(Date:5/21/2013)... stem cells in the blood often jump into ... cells that can fight off illness. But repeated ... potentially leading to the development of serious blood ... researchers led by biologists at the California Institute ... models, the molecule microRNA-146a (miR-146a) acts as a ...
(Date:5/21/2013)... Cancers of all types become most deadly when they ... has reached this stage, it becomes very difficult for ... can develop. Now, researchers at the University of Missouri ... target lymphoma tumor cells wherever they may be in ... in the MU College of Veterinary Medicine, says being ...
Breaking Biology News(10 mins):Study reveals how fishing gear can cause slow death of whales 2Study reveals how fishing gear can cause slow death of whales 3Keeping stem cells strong 2MU researchers develop radioactive nanoparticles that target cancer cells 2
... Elsevier, a world-leading provider of scientific, technical and medical ... Dietetics announce that the Journal of the American Dietetic ... of Nutrition and Dietetics , mirroring the name change of ... "The new name, the Academy of Nutrition and Dietetics, ...
... of increasing concern about low vitamin D levels in the ... vitamin, scientists are reporting development of a much-needed reference material ... The report appears in ACS, journal Analytical Chemistry . ... vitamin D deficiency or insufficiency may be even more common ...
... The research assesses the benefits of white roofs and aims ... white roofs are suitable for their buildings and guide them ... Robert Doyle said Council had already put the research into ... "There has been a lot of talk about ...
Cached Biology News:Journal of American Dietetic Association becomes Journal of the Academy of Nutrition and Dietetics 2New standard for vitamin D testing to ensure accurate test results 2White roofs to make for cooler Melbourne buildings 2
(Date:5/22/2013)... (PRWEB) May 22, 2013 iLuv Creative ... of accessories for the mobile lifestyle, announces they are ... protect, and manage multiple iPad devices efficiently. Winner of ... the 2012 Good Design award, MultiCharger-X is revolutionizing the ... wherever it is deployed. , MultiCharger-X (iAD910) ...
(Date:5/22/2013)... 22, 2013   Oligomerix, Inc. , a ... modifying therapeutics for Alzheimer,s disease (AD) and related ... Series B financing, which includes both issuance of ... represent approximately $2.8M in new investments in the ... the raise. Funding from the ...
(Date:5/22/2013)... NEW ORLEANS , May 22, 2013  Organogenesis ... medicine, presented new data generated in collaboration with a ... health economics consultancy) demonstrating the significant healthcare resource and ... leg ulcers (VLU) place upon the US healthcare system. ... reveal annual costs of up to $15 billion and ...
(Date:5/22/2013)... 22, 2013 AudioNotch ... for tinnitus treatment. AudioNotch is pleased to announce ... clinic locations in both British Columbia and Alberta, ... and hearing services. AudioNotch's tinnitus treatment program is ... entering a Destination Hearing clinic, patients have the ...
Breaking Biology Technology:iLuv Now Shipping the All New MultiCharger-X 2iLuv Now Shipping the All New MultiCharger-X 3Oligomerix, Inc. Completes Series B Financing 2Oligomerix, Inc. Completes Series B Financing 3Organogenesis Presents Findings from Groundbreaking Research Highlighting the Healthcare Resource and Economic Burden of Venous Leg Ulcers and Diabetic Foot Ulcers 2Organogenesis Presents Findings from Groundbreaking Research Highlighting the Healthcare Resource and Economic Burden of Venous Leg Ulcers and Diabetic Foot Ulcers 3Organogenesis Presents Findings from Groundbreaking Research Highlighting the Healthcare Resource and Economic Burden of Venous Leg Ulcers and Diabetic Foot Ulcers 4AudioNotch Tinnitus Treatment Launches Partnership With Destination Hearing 2
... hold the key to production of tiny medical ... viruses or cancer markers, according to an interdisciplinary ... can be made more useful by assembling, at ... nanowires pretreated off chip," says Rustom B. Bhiladvala, ...
... 7 Eli Lilly and Company,(NYSE: LLY ) ... program, which was being conducted in partnership with Alkermes,Inc. ... as a potential,treatment for type 1 and type 2 ... result of any observations during AIR Insulin trials,relating to ...
... 7 Kendle (Nasdaq: KNDL ), a,leading, ... Chief Executive Officer Candace Kendle, PharmD, and,President and ... plans to sell shares of the company,s common ... are part of their personal,ongoing long-term strategy for ...
Cached Biology Technology:Assembly technique for tiny wires may eventually help detect cancer and other diseases 2Assembly technique for tiny wires may eventually help detect cancer and other diseases 3Lilly Announces Termination of AIR Insulin Program 2Lilly Announces Termination of AIR Insulin Program 3Lilly Announces Termination of AIR Insulin Program 4Kendle Leaders Adopt 10b5-1 Trading Plans 2
... PBL's bioassays for interferons are cytopathic effect ... assays. Sample types include; tissue culture supernatents; ... In these assays, one unit is defined as ... reduce the cytopathic effect of viral infection by ...
... PBL's bioassays for interferons are cytopathic effect ... assays. Sample types include; tissue culture supernatents; ... In these assays, one unit is defined as ... reduce the cytopathic effect of viral infection by ...
...
Request Info...
Biology Products: