Regressions for conversion between target strength and fish length in horizontal acoustic surveys
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F09%3A00330234" target="_blank" >RIV/60077344:_____/09:00330234 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Regressions for conversion between target strength and fish length in horizontal acoustic surveys
Original language description
Both ways conversions between fish target strength (TS) and length are extremely important for the accuracy of acoustic fisheries surveys. At present, no universal method is available for aspect corrections during mobile horizontal surveys. For random aspect situations, the deconvolution of fish aspect in the beam can be used converting all TS to side aspect whose relationship to length is well known. For converting catch data to TS, the regression of TS of average horizontal backscattering strength onlength can be applied successfully. The average regressions for common European species are being suggested for routine acoustic surveys in combination with direct pelagic fishing for the assessment of ecological status of lakes and reservoirs for EU Water framework directive. This approach reduces the resolution towards local fish size variations but simplifies the processing and provides much better definition of fish abundance.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
EH - Ecology - communities
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA206%2F07%2F1392" target="_blank" >GA206/07/1392: Horizontal acoustic surveys and fish behaviour in the open water</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Underwater acoustic measurements, Technologies & Results
ISBN
978-960-98883-2-5
ISSN
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e-ISSN
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Number of pages
6
Pages from-to
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Publisher name
Foundation for Research & Technology
Place of publication
Heraklion
Event location
Nafplion
Event date
Jun 21, 2009
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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