Sockeye salmon that sprint to spawning grounds through fast-moving waters may be at risk, suggests new research by University of British Columbia scientists.
When salmon encounter turbulent, fast-moving water—such as rapids or areas downstream of dams—they must move upstream using a behavior known as “burst swimming” that is similar to sprinting for humans.
“Days after sockeye passed through extremely fast-moving water, we started to see fish dying only a short distance from their spawning grounds,” said Nicholas Burnett, a research biologist at UBC and lead author of the study, published today in Physiology and Biochemical Zoology.
“We now understand how this important but energetically costly swimming behavior can impact the survival of sockeye during their upstream migration,” said Burnett, who worked on this study as part of his master’s research with UBC Professor Scott Hinch and Carleton University Professor Steven Cooke.
“Our work demonstrates how important it is for salmon to have easy access around obstacles in the river.”
Researchers tagged fish with accelerometer transmitters, a new tracking technology that records how fast fish swim and how much oxygen they consume.
Tagged fish were released in the high flows downstream of a dam in southwestern British Columbia and tracked as they navigated through a fishway and two lakes to their spawning grounds.
N. J. Burnett, S. G. Hinch, D. C. Braun, M. T. Casselman, C. T. Middleton, S. M. Wilson, and S. J. Cooke, “Burst Swimming in Areas of High Flow: Delayed Consequences of Anaerobiosis in Wild Adult Sockeye Salmon,” Physiological and Biochemical Zoology 87(5), September/October 2014. http://www.jstor.org/stable/10.1086/677219
Physiological and Biochemical Zoology (http://journals.uchicago.edu/PBZ) publishes original research in animal physiology and biochemistry, with a specific emphasis on studies that address the ecological and/or evolutionary aspects of physiological and biochemical mechanisms. Studies at all levels of biological organization from the molecular to the whole organism are welcome, and work that integrates levels of organization to address important questions in behavioral, ecological, evolutionary, or comparative physiology is particularly encouraged.
Emily Murphy | Eurek Alert!
New approach for environmental test on livestock drugs
27.07.2016 | Universität Zürich
Managing an endangered river across the US-Mexico border
18.07.2016 | International Institute for Applied Systems Analysis (IIASA)
Transparent electronics devices are present in today’s thin film displays, solar cells, and touchscreens. The future will bring flexible versions of such devices. Their production requires printable materials that are transparent and remain highly conductive even when deformed. Researchers at INM – Leibniz Institute for New Materials have combined a new self-assembling nano ink with an imprint process to create flexible conductive grids with a resolution below one micrometer.
To print the grids, an ink of gold nanowires is applied to a substrate. A structured stamp is pressed on the substrate and forces the ink into a pattern. “The...
A new Fraunhofer MEVIS method conveys medical interrelationships quickly and intuitively with innovative visualization technology
On the monitor, a brain spins slowly and can be examined from every angle. Suddenly, some sections start glowing, first on the side and then the entire back of...
Researchers at the U.S. Department of Energy's (DOE) Ames Laboratory have discovered an unusual property of purple bronze that may point to new ways to achieve high temperature superconductivity.
While studying purple bronze, a molybdenum oxide, researchers discovered an unconventional charge density wave on its surface.
Munich Physicists have developed a novel electron microscope that can visualize electromagnetic fields oscillating at frequencies of billions of cycles per second.
Temporally varying electromagnetic fields are the driving force behind the whole of electronics. Their polarities can change at mind-bogglingly fast rates, and...
Breakup of continents with two speed: Continents initially stretch very slowly along the future splitting zone, but then move apart very quickly before the onset of rupture. The final speed can be up to 20 times faster than in the first, slow extension phase.phases
Present-day continents were shaped hundreds of millions of years ago as the supercontinent Pangaea broke apart. Derived from Pangaea’s main fragments Gondwana...
29.07.2016 | Event News
15.07.2016 | Event News
15.07.2016 | Event News
29.07.2016 | Power and Electrical Engineering
29.07.2016 | Life Sciences
29.07.2016 | Event News