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| Conti, Stéphane; Roux, Philippe; Fauvel, Christian; Maurer, Benjamin; Demer, David. |
| A challenge for the aquaculture community has long been the development of harmless techniques for monitoring fish in a tank. Acoustic telemetry has been used to monitor fish swimming behavior, and passive acoustics have been used to monitor fish feeding, but new techniques are needed to monitor non-invasively their numbers and growth rates. Recently, it has been demonstrated that the acoustical total scattering cross section of fish swimming in a tank can be measured from multiple reverberation time series. These measurements have been used successfully to estimate the number of fish in a tank in laboratory conditions, and to characterize their acoustical signatures. Here, we introduce a novel method for acoustically monitoring fish numerical density and... |
| Tipo: Text |
Palavras-chave: Total scattering cross section; Fish counting; Growth rate; Remote monitoring; Fish behavior. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1121.pdf |
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| Vandemeulebrouck, J.; Roux, Philippe; Cros, Estelle. |
| Old Faithful Geyser in Yellowstone National Park (USA) has attracted numerous scientific investigations for over two centuries to better understand its geological structure, the physics of its eruptions, and the controls of its intermittency. Using data acquired with a seismic array in 1992, we track the sources of hydrothermal tremor produced by boiling and cavitation inside the geyser. The location of seismic sources identifies a previously unknown lateral cavity at 15m below the surface, on the SW side of the vent, and connected to the conduit. This reservoir is activated at the beginning of each geyser eruption cycle and plays a major role in the oscillatory behavior of the water level in the conduit before each eruption. |
| Tipo: Text |
Palavras-chave: Geyser; Hydrothermal; Seismology; Old Faithful; Tremor. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00171/28263/26703.pdf |
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