Regressions for conversion between target strength and fish length in horizontal acoustic surveys

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Regressions for conversion between target strength and fish length in horizontal acoustic surveys

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Regressions for conversion between target strength and fish length in horizontal acoustic surveys

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

EH - Ekologie – společenstva

OECD FORD obor

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Projekt

<a href="/cs/project/GA206%2F07%2F1392" target="_blank" >GA206/07/1392: Horizontální akustické průzkumy a chování ryb ve volné vodě</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Underwater acoustic measurements, Technologies & Results

ISBN

978-960-98883-2-5

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

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Název nakladatele

Foundation for Research & Technology

Místo vydání

Heraklion

Místo konání akce

Nafplion

Datum konání akce

21. 6. 2009

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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