Comparison of hydroacoustic estimates with fish census in shallow Malta Reservoir ? which TS/L regression to use in horizontal beam applications?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F12%3A00377840" target="_blank" >RIV/60077344:_____/12:00377840 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.fishres.2011.11.023" target="_blank" >http://dx.doi.org/10.1016/j.fishres.2011.11.023</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fishres.2011.11.023" target="_blank" >10.1016/j.fishres.2011.11.023</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of hydroacoustic estimates with fish census in shallow Malta Reservoir ? which TS/L regression to use in horizontal beam applications?

Popis výsledku v původním jazyce

In shallow waters horizontally aimed transducers are used to maximize usable survey volume due to the physical limitations of the environment. However, horizontal acoustic measurements of fish lengths are problematic because in mobile applications thereis no way to determine the orientation of the fish relative to the axis of the acoustic beam. The draining of Malta Reservoir in Poland (average depth 3 m) provided an unique opportunity to check the accuracy of acoustic estimates of fish biomass. Beforedraining, detailed investigations of the fish population were performed using standard gillnetting and horizontal echosounding (split beam Simrad EY500, 120 kHz). During the draining of the reservoir fish were collected and weighted. Three different methods were used to convert the horizontal measurements of acoustic energy into fish total length and the biomass estimates were compared with the results of the fish census that was performed during the draining of the reservoir. The best

Název v anglickém jazyce

Comparison of hydroacoustic estimates with fish census in shallow Malta Reservoir ? which TS/L regression to use in horizontal beam applications?

Popis výsledku anglicky

In shallow waters horizontally aimed transducers are used to maximize usable survey volume due to the physical limitations of the environment. However, horizontal acoustic measurements of fish lengths are problematic because in mobile applications thereis no way to determine the orientation of the fish relative to the axis of the acoustic beam. The draining of Malta Reservoir in Poland (average depth 3 m) provided an unique opportunity to check the accuracy of acoustic estimates of fish biomass. Beforedraining, detailed investigations of the fish population were performed using standard gillnetting and horizontal echosounding (split beam Simrad EY500, 120 kHz). During the draining of the reservoir fish were collected and weighted. Three different methods were used to convert the horizontal measurements of acoustic energy into fish total length and the biomass estimates were compared with the results of the fish census that was performed during the draining of the reservoir. The best

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Fisheries Research

ISSN

0165-7836

e-ISSN

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Svazek periodika

123

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

90-97

Kód UT WoS článku

000304222800013

EID výsledku v databázi Scopus

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