Fish behaviour in responce to a midwater trawl footrope in temperate reservoirs

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F15%3A00443148" target="_blank" >RIV/60077344:_____/15:00443148 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.fishres.2015.06.025" target="_blank" >http://dx.doi.org/10.1016/j.fishres.2015.06.025</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fishres.2015.06.025" target="_blank" >10.1016/j.fishres.2015.06.025</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fish behaviour in responce to a midwater trawl footrope in temperate reservoirs

Popis výsledku v původním jazyce

This study addresses fish behaviour at the mouth of a midwater trawl in two temperate reservoirs. Fish distribution and behaviour were monitored using a SIMRAD EK60 (38 kHz) split-beam echosounder with the transducer deployed at the water surface, attached to the surface trawl headrope. We were able to describe day and night patterns of vertical distribution of fish in the reservoirs, describe fish behaviour near the footrope (i.e. vertical swimming velocity, fish tortuosity, vertical direction of swimming), and find the proportion of fish performing avoidance reactions. Significant differences were found between day and night distributions and behaviours. In total, only 35 of the 1514 acoustically recorded fish performed apparent avoidance behaviour.Twenty-seven avoidance reactions were observed in the day (6.3-% of total fish) while eight were observed at night (0.7-% of total fish). Fish were more active in the daytime, while tending to stay still in the water column with no observ

Název v anglickém jazyce

Fish behaviour in responce to a midwater trawl footrope in temperate reservoirs

Popis výsledku anglicky

This study addresses fish behaviour at the mouth of a midwater trawl in two temperate reservoirs. Fish distribution and behaviour were monitored using a SIMRAD EK60 (38 kHz) split-beam echosounder with the transducer deployed at the water surface, attached to the surface trawl headrope. We were able to describe day and night patterns of vertical distribution of fish in the reservoirs, describe fish behaviour near the footrope (i.e. vertical swimming velocity, fish tortuosity, vertical direction of swimming), and find the proportion of fish performing avoidance reactions. Significant differences were found between day and night distributions and behaviours. In total, only 35 of the 1514 acoustically recorded fish performed apparent avoidance behaviour.Twenty-seven avoidance reactions were observed in the day (6.3-% of total fish) while eight were observed at night (0.7-% of total fish). Fish were more active in the daytime, while tending to stay still in the water column with no observ

Druh

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

CEP obor

EH - Ekologie – společenstva

OECD FORD obor

—

Projekt

<a href="/cs/project/EE2.3.20.0204" target="_blank" >EE2.3.20.0204: Centrum pro ekologický potenciál rybích obsádek nádrží a jezer</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

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

—

Svazek periodika

172

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

105-113

Kód UT WoS článku

000362138700013

EID výsledku v databázi Scopus

2-s2.0-84937916402