Navigation Links
Fish living near the equator will not thrive in the warmer oceans of the future

According to an international team of researchers, the rapid pace of climate change is threatening the future presence of fish near the equator.

"Our studies found that one species of fish could not even survive in water just three degrees Celsius warmer than what it lives in now," says the lead author of the study, Dr Jodie Rummer from the ARC Centre of Excellence for Coral Reef Studies (Coral CoE) at James Cook University.

Dr Rummer and her colleagues studied six common species of fish living on coral reefs near the equator. She says many species in this region only experience a very narrow range of temperatures over their entire lives, and so are likely adapted to perform best at those temperatures.

This means climate change places equatorial marine species most at risk, as oceans are projected to warm by two to three degrees Celsius by the end of this century.

"Such an increase in warming leads to a loss of performance," Dr Rummer explains. "Already, we found four species of fish are living at or above the temperatures at which they function best."

The team measured the rates at which fish use oxygen, the fuel for metabolism, across different temperatures - at rest and during maximal performance. According to the results, at warmer temperatures fish lose scope for performance. In the wild, this would limit activities crucial to survival, such as evading predators, finding food, and generating sufficient energy to breed.

Because many of the Earth's equatorial populations are now living close to their thermal limits, there are dire consequences ahead if these fish cannot adapt to the pace at which oceans are warming.

Dr Rummer suggests there will be declines in fish populations as species may move away from the equator to find refuge in areas with more forgiving temperatures.

"This will have a substantial impact on the human societies that depend on these fish," she says.

A concentration of developing countries lies in the equatorial zone, where fish are crucial to the livelihoods and survival of millions of people, including those in Papua New Guinea and Indonesia.

In an era of rapid climate change, understanding the link between an organism and its environment is crucial to developing management strategies for the conservation of marine biodiversity and the sustainable use of marine fisheries.

"This is particularly urgent when considering food security for human communities."


Contact: Jodie Rummer
ARC Centre of Excellence in Coral Reef Studies

Related biology news :

1. Protecting living fossil trees
2. Global Surgical Devices Market Growth Driven by Improving Standards of Living and Longer Life Expectancies, Research Shows
3. Molecular spectroscopy tracks living mammalian cells in real time as they differentiate
4. Nature: Microscope looks into cells of living fish
5. Living microprocessor tunes in to feedback
6. Photograph of a living human brain is the overall winner of Wellcome Image Awards 2012
7. Penn researchers improve living tissues with 3-D printed vascular networks made from sugar
8. Force of nature: Defining the mechanical mechanisms in living cells
9. A new look at proteins in living cells
10. Living power cables discovered
11. Watching the cogwheels of the biological clock in living cells
Post Your Comments:
(Date:10/12/2015)... 2015 NXTD ) ("NXT-ID" or the ... commerce market, reports on the recent SNS Future in Review ... --> NXTD ) ("NXT-ID" or the "Company"), a biometric ... on the recent SNS Future in Review Conference in ... Inc. (NASDAQ: NXTD ) ("NXT-ID" or the "Company"), a ...
(Date:10/8/2015)... LAKE CITY , 8. Oktober 2015 ... TRCK), ein global tätiges Unternehmen des Bereiches ... einem Vertrag mit der Gefängnisbehörde Virginias (Department ... dessen Rahmen elektronische Überwachungsdienste für alle Strafen ... Derek Cassell , Präsident für den ...
(Date:10/6/2015)... 6, 2015 Track Group, Inc. (OTCQX: TRCK), ... has signed a contract with the Virginia Department of ... range of sentences under the Department,s oversight. ... "This contract with the Virginia DOC will expand our ... advances our position as a trusted leader in offender ...
Breaking Biology News(10 mins):
(Date:10/12/2015)... /PRNewswire/ - Aeterna Zentaris Inc. (NASDAQ:  AEZS) (TSX: AEZ) ... and commercializing novel treatments in oncology, endocrinology and women,s ... , the Company,s former Senior Vice President, Chief Financial ... Quebec City office.  David ... of the Company commented, "After a comprehensive review, the ...
(Date:10/12/2015)... , Belgium , Oct. 12, 2015 /PRNewswire/ ... that full results from a completed clinical study of its ... have been published in the online issue of Clinical ... The peer-reviewed study was conducted in collaboration with ... led by Roland Andersson , MD, PhD, Professor of ...
(Date:10/11/2015)... ... October 11, 2015 , ... Intelligent Implant Systems, LLC is ... multiple surgeries have been completed with this new posterior thoracolumbar spinal fusion system. ... Center of the Carolinas. The Revolution™ Spinal System pioneers a new approach ...
(Date:10/9/2015)... 9, 2015 Governor Tom Wolf ... company focused on developing T-cell receptor cancer immunotherapy treatments, ... a new expansion project. Pennsylvania ... commonwealth as 110 new, high-paying jobs will be created ... "My budget proposal includes sustained funding for the life ...
Breaking Biology Technology: