Sinusoidal cycling swimming pattern of reservoir fishes.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077387%3A_____%2F02%3A62023112" target="_blank" >RIV/60077387:_____/02:62023112 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Sinusoidal cycling swimming pattern of reservoir fishes.

Popis výsledku v původním jazyce

A circular transducer fixed on the bottom close to the deepest point of the Rimov Reservoir and beaming up towards the surface showed that most fishes stayed in the epilimnion during the summer. The majority of larger fish in open water performed characteristic sinusoidal movements in the vertical plane during July and August days. As they crossed the sonar beam, the fish changed their depth several times. Fish started to swim up-and-down after sunrise and continued doing so during daytime. The sinusoidal movement pattern was replaced by direct movement before sunset. Variation of target strength indicates active changes of fish tilt in transient phases of the sinusoidal cycle rather than changes of swim bladder volume. Up-and-down fish swimming is likely to be an efficient way of visual inspecting a larger volume of the epilimnion for prey - large zooplankton, whose epilimnetic density in the reservoir is low and patchy in summer time.

Název v anglickém jazyce

Sinusoidal cycling swimming pattern of reservoir fishes.

Popis výsledku anglicky

A circular transducer fixed on the bottom close to the deepest point of the Rimov Reservoir and beaming up towards the surface showed that most fishes stayed in the epilimnion during the summer. The majority of larger fish in open water performed characteristic sinusoidal movements in the vertical plane during July and August days. As they crossed the sonar beam, the fish changed their depth several times. Fish started to swim up-and-down after sunrise and continued doing so during daytime. The sinusoidal movement pattern was replaced by direct movement before sunset. Variation of target strength indicates active changes of fish tilt in transient phases of the sinusoidal cycle rather than changes of swim bladder volume. Up-and-down fish swimming is likely to be an efficient way of visual inspecting a larger volume of the epilimnion for prey - large zooplankton, whose epilimnetic density in the reservoir is low and patchy in summer time.

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

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

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

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

Název periodika

Journal of Fish Biology

ISSN

0022-1112

e-ISSN

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Svazek periodika

61

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

16

Strana od-do

456-471

Kód UT WoS článku

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EID výsledku v databázi Scopus

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