A red grouper pauses on the seabed of Dry Tortugas National Park, Florida, surrounded by gorgonian soft coral, sponges, and algae. (Photo by Rosenstiel School Associate Scientist Jiangang Luo.)
Researchers use high-tech acoustics to make marine-protected areas better
Rosenstiel School fisheries researchers will embark on state-of-the-art research at the end of February to track black and red grouper in the Dry Tortugas National Park to develop a better understanding of species’ movement and habitat require-ments, so they can help more efficiently design and assess future marine-protected areas. Through funding from the National Park Service and transportation support from Yankee Fleet Ferry Service, scientists will be able to conduct this high-tech observation that involves surgically implanted transmitters for approximately a year.
The scientists have designed a field study that uses acoustic telemetry technology to track continuously the movements and habitat use of red and black grouper in the Dry Tortugas National Park, the 46-square-nautical-mile marine reserve. The groupers will be fitted with transmitters or “pingers” that emit unique acoustic codes underwater approximately every 20 seconds. Passive listening stations or receivers will be placed in a submersed array that can detect the transmitters. Receivers will record an acoustic tag’s presence when it is within range, usually 250-1,000 meters, depending on the oceanographic conditions. And, because the tags each emit unique identification numbers and time stamps, individual receivers could potentially detect up to 4,000 different fish at any given time.
Ivy F. Kupec | EurekAlert!
Upcycling 'fast fashion' to reduce waste and pollution
03.04.2017 | American Chemical Society
Litter is present throughout the world’s oceans: 1,220 species affected
27.03.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
24.04.2017 | Physics and Astronomy
24.04.2017 | Materials Sciences
24.04.2017 | Life Sciences