Fish avoidance of acoustic survey boat in shallow waters
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F05%3A00006349" target="_blank" >RIV/60076658:12310/05:00006349 - isvavai.cz</a>
Alternative codes found
RIV/60077387:_____/05:00023529
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Fish avoidance of acoustic survey boat in shallow waters
Original language description
The avoidance reactions of fish with respect to a survey vessel were studied during horizontal acoustic applications of Simrad EY500 split-beam echosounder (120 kHz) in two lakes (Wallersee, Balaton) and two reservoirs (Orlík, Římov). Three methods wereused to assess the fish avoidance reaction to the surveying vessel:. Comparing acoustic biomass for revealing avoidance reactions is limited. According to the slope of fish movement all fish were divided in two groups: with a positive value of slope (fish swimming away from the transducer) and with a negative slope (fish swimming towards the transducer). Fish avoidance caused higher values of slope. Most avoidance behaviour was found with small fish (target strength, TS < -40 dB, 21 cm) in ranges under10 m. In Czech reservoirs there was found no significant indications of fish avoidance. Much less avoidance behaviour was found with fish bigger then TS > -40 dB. At ranges over 10 m, the avoidance of small boats (5-6 m long, 15-25 HP two
Czech name
Únik ryb před hydroakustickou průzkumnou lodí v mělkých vodách
Czech description
Únikové reakce ryb byly sledovány třemi odlišnými metodami v jezerech (Wallersee, Balaton) a přehradních nádržích (Orlík, Římov). Výsledky jasně ukazují, že ve vzdálenostech přes 10 m od menších výzkumných plavidel nepředstavují únikové reakce významný problem, ryby se chovají stejně, jako by loď nebyla přítomna.
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
GL - Fishery
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2005
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Fisheries Research
ISSN
0165-7836
e-ISSN
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Volume of the periodical
72
Issue of the periodical within the volume
2-3
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
219-228
UT code for WoS article
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EID of the result in the Scopus database
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