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

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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 on length 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. 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 on length 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. (en)
Title	Regressions for conversion between target strength and fish length in horizontal acoustic surveys Regressions for conversion between target strength and fish length in horizontal acoustic surveys (en)
skos:prefLabel	Regressions for conversion between target strength and fish length in horizontal acoustic surveys Regressions for conversion between target strength and fish length in horizontal acoustic surveys (en)
skos:notation	RIV/60077344:_____/09:00330234!RIV10-AV0-60077344
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA206/07/1392), Z(AV0Z60170517)
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Frouzová, Jaroslava Kubečka, Jan Draštík, Vladislav Prchalová, Marie Čech, Martin
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Biologické centrum AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	338655
http://linked.open...ai/riv/idVysledku	RIV/60077344:_____/09:00330234
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	acoustic fish assessment; target strength; water framework directive (en)
http://linked.open.../riv/klicoveSlovo	target strength water framework directive acoustic fish assessment
http://linked.open...ontrolniKodProRIV	[9D3251167AE6]
http://linked.open...v/mistoKonaniAkce	Nafplion
http://linked.open...i/riv/mistoVydani	Heraklion
http://linked.open...i/riv/nazevZdroje	Underwater acoustic measurements, Technologies & Results
http://linked.open...in/vavai/riv/obor	EH
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Horizontal acoustic surveys and fish behaviour in the open water
http://linked.open...UplatneniVysledku	2009
http://linked.open...iv/tvurceVysledku	Kubečka, Jan Prchalová, Marie Čech, Martin Frouzová, Jaroslava Draštík, Vladislav Balk, H.
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2009-06-21 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Struktura, funkce a vývoj vodních ekosystémů
number of pages	6 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Foundation for Research & Technology
https://schema.org/isbn	978-960-98883-2-5

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