Počet záznamů: 1

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

  1. 1.
    SYSNO ASEP0330234
    Druh ASEPC - Konferenční příspěvek (mezinárodní konf.)
    Zařazení RIVD - Článek ve sborníku
    NázevRegressions for conversion between target strength and fish length in horizontal acoustic surveys
    Tvůrce(i)Kubečka, Jan (BC-A) - Frouzová, Jaroslava (BC-A) - Balk, H. (NO) - Čech, Martin (BC-A) - Draštík, Vladislav (BC-A) - Prchalová, Marie (BC-A)
    Zdroj.dok.Underwater acoustic measurements, Technologies & Results. - Heraklion : Foundation for Research & Technology, 2009 / Papadakis J. S. ; Bjorno L. - ISBN 978-960-98883-2-5
    Poč.str.6 s.
    AkceUnderwater acoustic measurements, Technologies & Results
    Datum konání21.06.2009-27.06.2009
    Místo konáníNafplion
    ZeměGR - Řecko
    Typ akceWRD
    Jazyk dok.eng - angličtina
    Země vyd.GR - Řecko
    Klíč. slovaacoustic fish assessment ; target strength ; water framework directive
    Vědní obor RIVEH - Ekologie - společenstva
    CEPGA206/07/1392 GA ČR - Grantová agentura ČR
    CEZAV0Z60170517 - HBU-Z, BC-A (2005-2011)
    AnotaceBoth 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.
    PracovištěBiologické centrum (od r. 2006)
    KontaktVáclava Lavičková, lavickova@hbu.cas.cz, Tel.: 387 775 889
    Rok sběru2010