Změny akustické síly ozvů během ranného vývoje okouna říčního

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F04%3A00005273" target="_blank" >RIV/60076658:12310/04:00005273 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60077387:_____/04:00104271

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Changes of acoustic target strength during juvenile perch development

Popis výsledku v původním jazyce

Dependence of acoustic size (target strength-TS in dB) on body length of juvenile perch (Perca fluviatilis L.) was studied. Perch larvae were reared in a laboratory tank from spawning to the age of 89 days. Fish length and TS were measured during 3, 7, 15, 22, 45 and 89 days of life. TS was measured using a Simrad 500 EY split-beam echosounder with the frequency 120 kHz and a BioSonics Model 101 dual-beam echosounder with the frequency 420 kHz in down-looking, horizontal and up-looking directions. Rangeof fish body length 7-41 mm corresponded with a TS range from -69 to -53 dB. Differences between TS of different aspects were not found in young fish larvae. TS in ventral and dorsal aspects appears to grow faster than in the side aspect for fish 15-30mm long. With perch larger than 40 mm, vertical and side aspects reach similar values. This paper provides regressions for the size identification of acoustically detected fish targets. The results indicate that the TS/length relationship

Název v anglickém jazyce

Changes of acoustic target strength during juvenile perch development

Popis výsledku anglicky

Dependence of acoustic size (target strength-TS in dB) on body length of juvenile perch (Perca fluviatilis L.) was studied. Perch larvae were reared in a laboratory tank from spawning to the age of 89 days. Fish length and TS were measured during 3, 7, 15, 22, 45 and 89 days of life. TS was measured using a Simrad 500 EY split-beam echosounder with the frequency 120 kHz and a BioSonics Model 101 dual-beam echosounder with the frequency 420 kHz in down-looking, horizontal and up-looking directions. Rangeof fish body length 7-41 mm corresponded with a TS range from -69 to -53 dB. Differences between TS of different aspects were not found in young fish larvae. TS in ventral and dorsal aspects appears to grow faster than in the side aspect for fish 15-30mm long. With perch larger than 40 mm, vertical and side aspects reach similar values. This paper provides regressions for the size identification of acoustically detected fish targets. The results indicate that the TS/length relationship

Druh

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

CEP obor

GL - Rybářství

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

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

66

Číslo periodika v rámci svazku

2-3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

355-361

Kód UT WoS článku

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EID výsledku v databázi Scopus

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