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New Simrad split-beam scientific transducer for superior
ecosystem monitoring
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Pressure resistant echo sounder transducer
enables research in deeper waters
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Simrad, a leading developer of fishery and scientific transducer
technology has introduced a next generation split-beam composite
transducer designed primarily for deep-water research applications
and ecosystem monitoring. The new 120 kHz Simrad ES120-7CD
transducer can operate in water pressure down to 1500 meters,
enabling scientists to collect improved data on fish species and
smaller targets such as zooplankton. |
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The traditional use of the scientific echo sounder has been fish
stock assessment typically based on hull mounted transducers
onboard research vessels, but the ES120-7CD is suitable for
installation on towed bodies, AUVs, buoys and landers, enabling
scientists to look deeper than ever before.
- Since many of the species of interest are found in deeper water
they are harder to detect using hull-mounted transducers, so the
transducer must be lowered down to the targets to provide the
ecosystem data that marine scientists require, says Frank Reier
Knudsen, Fishery Biologist/Fishery Research, Simrad. |
- To address this, we have developed a new series of pressure
resistive transducers that can operate down to 1500m on towed
bodies or the sea floor, he says.
Recently, it has been documented that by using many acoustic
frequencies it is possible to discriminate between species,
identify species and study species interactions. Particular
attention has been directed towards smaller targets like
zooplankton and multi-frequency acoustics has proven a valuable
tool in zooplankton identification and fish-zooplankton
discrimination. With the new ES120-7CD, the Simrad series of
pressure resistant transducers is now suitable for even more
scientific and fishery research applications. |
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- With growing environmental concern there is a need to monitor
all ecosystem components including plankton and fish, from the
surface down to deep waters. We hope that our new series of
pressure resistant transducers, including our latest introduction,
the ES120-7CD, will become valuable ecosystem monitoring tools.
This new generation of transducers addresses new directives and
regulations that aim to establish routines for effective and
non-invasive monitoring of all ecosystem components, adds Frank. |
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World Fishing Today November 11. 2009 |
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