Počet záznamů: 1

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

SYSNO ASEP	0330234
Druh ASEP	C - Konferenční příspěvek (mezinárodní konf.)
Zařazení RIV	D - Článek ve sborníku
Název	Regressions for conversion between target strength and fish length in horizontal acoustic surveys
Tvůrce(i)	Kubečka, Jan (BC-A)_{RID, ORCID} Frouzová, Jaroslava (BC-A)_{RID, ORCID} Balk, H. (NO) Čech, Martin (BC-A)_{RID, ORCID} Draštík, Vladislav (BC-A)_{RID, ORCID} Prchalová, Marie (BC-A)_{RID, ORCID}
Zdroj.dok.	Underwater acoustic measurements, Technologies & Results. - Heraklion : Foundation for Research & Technology, 2009 / Papadakis J. S. ; Bjorno L. - ISBN 978-960-98883-2-5
Rozsah stran	s. 1039-1044
Poč.str.	6 s.
Akce	Underwater acoustic measurements, Technologies & Results
Datum konání	21.06.2009-27.06.2009
Místo konání	Nafplion
Země	GR - Řecko
Typ akce	WRD
Jazyk dok.	eng - angličtina
Země vyd.	GR - Řecko
Klíč. slova	acoustic fish assessment ; target strength ; water framework directive
Vědní obor RIV	EH - Ekologie - společenstva
CEP	GA206/07/1392 GA ČR - Grantová agentura ČR
CEZ	AV0Z60170517 - HBU-Z, BC-A (2005-2011)
Anotace	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.
Pracoviště	Biologické centrum (od r. 2006)
Kontakt	Dana Hypšová, eje@eje.cz, Tel.: 387 775 214
Rok sběru	2010

Počet záznamů: 1