Local fisheries part of bigger cycle affecting entire Pacific Ocean
In the late 1930s, Californias sardines supported the biggest fishery in the western hemisphere, with more than half a million tons of fish caught each year. By the mid-1950s, the sardines had virtually disappeared. Although fishing pressure may have played a part in this process, new research published in the current issue of Science indicates that the sardines demise was part of a 50-year cycle that affects not just California, but the entire Pacific Ocean.
Francisco Chavez, a biological oceanographer at the Monterey Bay Aquarium Research Institute (MBARI) and lead author of the study, combined a hundred years of data on physical oceanography, marine biology, and meteorology to examine long-term cycles in different parts of the Pacific Ocean. He points out that sardine catches in California, Japan and Peru followed parallel trends, despite being on opposite sides of the ocean and facing different amounts of fishing pressure. More importantly, when sardine catches in both areas went bust, anchovy catches boomed. Chavezs research indicates that this alternation between a "sardine regime" and an "anchovy regime" involves much more than just fisheries. As he puts it, "Fish in many parts of the Pacific are marching to the same drummer. This same drummer is causing changes in ocean circulation and in the global carbon cycle. What weve been trying to find out is, what is the drummer, and is the beat going to change?"
Debbie Meyer | EurekAlert!
Nonstop Tranport of Cargo in Nanomachines
20.11.2018 | Max-Planck-Institut für molekulare Zellbiologie und Genetik
Researchers find social cultures in chimpanzees
20.11.2018 | Universität Leipzig
Max Planck researchers revel the nano-structure of molecular trains and the reason for smooth transport in cellular antennas.
Moving around, sensing the extracellular environment, and signaling to other cells are important for a cell to function properly. Responsible for those tasks...
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
19.11.2018 | Event News
09.11.2018 | Event News
06.11.2018 | Event News
20.11.2018 | Physics and Astronomy
20.11.2018 | Medical Engineering
20.11.2018 | Physics and Astronomy