Increased levels of water temperature can have critical effects on predator-prey interactions in the marine environment. Increased water temperature, for example, could be beneficial to a predator if the primary effect were to accelerate its level of metabolism, and thus enhance foraging activity. On the other hand, warm temperatures could also enhance the metabolism of the prey, increasing its activity, mobility, and ability to escape from predators.
In a recent issue of the Marine Ecology Progress Series, an article by URI Graduate School of Oceanography fisheries biologists David L. Taylor and Jeremy S. Collie describes the effect of temperature on the feeding behavior of sand shrimp preying on juvenile winter flounder. The study was funded by the National Oceanic and Atmospheric Administrations Cooperative Marine Education and Research program.
Predation by the sand shrimp has been implicated as one of the most significant sources of mortality for recently hatched metamorphosed winter flounder. Experiments conducted by Taylor and Collie found that shrimp consumption rates on post-settlement flounder significantly increased with increasing flounder density, irrespective of water temperature. At low flounder densities, however, significantly more flounder were consumed at warm temperatures than at cold temperatures (16 °C and 10 °C, respectively, or 61 °F and 50 °F). Model estimates and visual observations of shrimp foraging behavior suggest that the variable feeding rates at different temperatures are the result of cold temperatures decreasing predator activity at low flounder densities, and conversely, shrimp maintaining high predation rates at low flounder densities when exposed to warm temperatures. These findings indicate that shrimp are capable of driving flounder populations to local extinction during warm water conditions.
Lisa Cugini | EurekAlert!
Preservation of floodplains is flood protection
27.09.2017 | Technische Universität München
Conservationists are sounding the alarm: parrots much more threatened than assumed
15.09.2017 | Justus-Liebig-Universität Gießen
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
17.10.2017 | Event News
10.10.2017 | Event News
10.10.2017 | Event News
20.10.2017 | Information Technology
20.10.2017 | Materials Sciences
20.10.2017 | Interdisciplinary Research