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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Comparison of hydroacoustic estimates with fish census in shallow Malta Reservoir ? which TS/L regression to use in horizontal beam applications?
Original language description
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
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EH - Ecology - communities
OECD FORD branch
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Project
<a href="/en/project/GA206%2F07%2F1392" target="_blank" >GA206/07/1392: Horizontal acoustic surveys and fish behaviour in the open water</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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