Evaluation of potential bias in observing fish with a DIDSON acoustic camera
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F14%3A43887408" target="_blank" >RIV/60076658:12310/14:43887408 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/60076658:12510/14:43887408
Výsledek na webu
<a href="http://www.sciencedirect.com/science/article/pii/S0165783614000770" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0165783614000770</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.fishres.2014.02.031" target="_blank" >10.1016/j.fishres.2014.02.031</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Evaluation of potential bias in observing fish with a DIDSON acoustic camera
Popis výsledku v původním jazyce
The DIDSON multi-beam sonar has become a popular tool for monitoring fish. The aim of this study was to determine how well the DIDSON sonar can detect and measure fish during stationary applications in lakes. Cyprinid fish of known sizes (10-60 cm long)and with horizontal body orientations were deployed in known positions at two ranges (6.3 and 9.5 m) within a DIDSON high-frequency array of beams. A new method for estimating fish length from multi-beam sonars was thus developed and applied. At both ranges, all the deployed fish were invariably detected when they were aligned with their sides perpendicular to the beam. Increasing fish body angle, however, reduced the ability of the system to detect fish. Only the largest fish were detectable when the fish were parallel to the beam (head or tail aspect). The estimated fish length agreed well with the actual length when the fish were positioned perpendicular to the center of the multi-beam array. The lengths were underestimated for fish
Název v anglickém jazyce
Evaluation of potential bias in observing fish with a DIDSON acoustic camera
Popis výsledku anglicky
The DIDSON multi-beam sonar has become a popular tool for monitoring fish. The aim of this study was to determine how well the DIDSON sonar can detect and measure fish during stationary applications in lakes. Cyprinid fish of known sizes (10-60 cm long)and with horizontal body orientations were deployed in known positions at two ranges (6.3 and 9.5 m) within a DIDSON high-frequency array of beams. A new method for estimating fish length from multi-beam sonars was thus developed and applied. At both ranges, all the deployed fish were invariably detected when they were aligned with their sides perpendicular to the beam. Increasing fish body angle, however, reduced the ability of the system to detect fish. Only the largest fish were detectable when the fish were parallel to the beam (head or tail aspect). The estimated fish length agreed well with the actual length when the fish were positioned perpendicular to the center of the multi-beam array. The lengths were underestimated for fish
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
EG - Zoologie
OECD FORD obor
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Návaznosti výsledku
Projekt
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Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2014
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Fisheries Research
ISSN
0165-7836
e-ISSN
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Svazek periodika
155
Číslo periodika v rámci svazku
JUL 2014
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
8
Strana od-do
114-121
Kód UT WoS článku
000336348400012
EID výsledku v databázi Scopus
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