A simple method to correct the results of acoustic surveys for fish hidden in the dead zone

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F13%3A00392325" target="_blank" >RIV/60077344:_____/13:00392325 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60076658:12310/13:43885371 RIV/60076658:12510/13:43885371

Výsledek na webu

<a href="http://dx.doi.org/10.1111/jai.12091" target="_blank" >http://dx.doi.org/10.1111/jai.12091</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jai.12091" target="_blank" >10.1111/jai.12091</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A simple method to correct the results of acoustic surveys for fish hidden in the dead zone

Popis výsledku v původním jazyce

In lentic freshwater systems, vertical acoustics may underestimate fish abundance in the acoustic dead zone where fish detection capability is limited. To estimate this bias, the height of fish above the lead-line of a benthic multi-mesh gillnet (1.5 m high) was used to quantify both the vertical distribution of fish near the bottom and the proportion residing within the acoustic dead zone. The study was carried out at the percid-dominated Biesbosch Reservoirs in the Netherlands. Acoustic dead zones were estimated at 7 cm above flat bottoms, and 12?34 cm above 8° sloped bottoms at depths of 5?27 m, respectively. Depending on the habitat, 36 to 75% of the gillnet catch by number was present in the acoustic dead zone, representing 5?51% of the biomass. Near-bottom depths were highly preferred by ruffe Gymnocephalus cernua, often used by perch Perca fluviatilis and pikeperch Sander lucioperca, plus seemingly devoid of smelt Osmerus eperlanus. The total amount of fish hidden in the acousti

Název v anglickém jazyce

A simple method to correct the results of acoustic surveys for fish hidden in the dead zone

Popis výsledku anglicky

In lentic freshwater systems, vertical acoustics may underestimate fish abundance in the acoustic dead zone where fish detection capability is limited. To estimate this bias, the height of fish above the lead-line of a benthic multi-mesh gillnet (1.5 m high) was used to quantify both the vertical distribution of fish near the bottom and the proportion residing within the acoustic dead zone. The study was carried out at the percid-dominated Biesbosch Reservoirs in the Netherlands. Acoustic dead zones were estimated at 7 cm above flat bottoms, and 12?34 cm above 8° sloped bottoms at depths of 5?27 m, respectively. Depending on the habitat, 36 to 75% of the gillnet catch by number was present in the acoustic dead zone, representing 5?51% of the biomass. Near-bottom depths were highly preferred by ruffe Gymnocephalus cernua, often used by perch Perca fluviatilis and pikeperch Sander lucioperca, plus seemingly devoid of smelt Osmerus eperlanus. The total amount of fish hidden in the acousti

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

<a href="/cs/project/QH81046" target="_blank" >QH81046: Optimalizace biomanipulačního efektu dravých ryb v ekosystémech vodních nádrží</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Journal of Applied Ichthyology

ISSN

0175-8659

e-ISSN

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Svazek periodika

29

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

6

Strana od-do

358-363

Kód UT WoS článku

000316223900008

EID výsledku v databázi Scopus

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