Scientists devise technique to detect squid egg clusters on the seafloor
California’s $30-million-a-year squid fishery has quadrupled in the past decade, but until now there has been no way to assess the continuing viability of squid stocks. Scientists have demonstrated new sonar methods to detect egg clusters of squid (Loligo opalescens), pictured above, off Monterey, California. (Photo by Roger B. Hanlon, Marine Biological Laboratory)
Squid return annually to spawn and lay clusters of finger-sized egg capsules on the seafloor off Monterey, California. (Photo courtesy Roger B. Hanlon, Marine Biological Laboratory)
California’s $30-million-a-year squid fishery has quadrupled in the past decade, but until now there has been no way to assess the continuing viability of squid stocks. A multi-institutional team of scientists this month reported a new sonar technique to locate squid egg clusters in the murky depths, offering a window onto next year’s potential squid population in its nursery.
The scientists demonstrated the new sonar methods off the coast of Monterey, California, where fishermen harvest squid in April and May as the squid return annually to spawn and lay clusters of finger-sized egg capsules on the seafloor. The scientists learned how to distinguish subtle sound signals reflected off gelatinous egg clusters and the adjacent sandy seafloor, and they could detect egg clusters less than 20 inches (0.5 meters) across.
Listening in: Acoustic monitoring devices detect illegal hunting and logging
14.12.2017 | Gesellschaft für Ökologie e.V.
How fires are changing the tundra’s face
12.12.2017 | Gesellschaft für Ökologie e.V.
DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.
Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
15.12.2017 | Power and Electrical Engineering
15.12.2017 | Materials Sciences
15.12.2017 | Life Sciences