Comparison of fish size spectra obtained from hydroacoustics and gillnets across seven European natural lakes.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F22%3A00569070" target="_blank" >RIV/60077344:_____/22:00569070 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1139/cjfas-2022-0037" target="_blank" >http://dx.doi.org/10.1139/cjfas-2022-0037</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1139/cjfas-2022-0037" target="_blank" >10.1139/cjfas-2022-0037</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of fish size spectra obtained from hydroacoustics and gillnets across seven European natural lakes.

Popis výsledku v původním jazyce

We conducted a systematic evaluation of the correspondence in fish length data obtained from vertical hydroacoustics and gillnetting across seven European natural lakes differing in abiotic and biotic characteristics. Length data were analyzed as continuous size spectra characterized by their maximum-likelihood estimated exponents b. First, we examined the relationship between size spectra obtained from the two sampling methods. We then examined whether size spectra from the two methods were correlated with lake descriptors separately or in combination. The modeled relationship between the exponents b from the two methods showed that the exponent b from the hydroacoustics was, on average, the same as that from the gillnet sampling in the seven lakes. The exponents b from the hydroacoustics and gillnets, when averaged, were significantly correlated with lake depth, while their differences were significantly correlated with mean air temperature. To conclude, the overall good correspondence between the continuous size distributions obtained by both methods supports the application of vertical hydroacoustics in acquiring size structure of fish communities in lakes, but not in fully replacing the invasive gillnetting. Yet, some specific methodological details require further research.

Název v anglickém jazyce

Comparison of fish size spectra obtained from hydroacoustics and gillnets across seven European natural lakes.

Popis výsledku anglicky

We conducted a systematic evaluation of the correspondence in fish length data obtained from vertical hydroacoustics and gillnetting across seven European natural lakes differing in abiotic and biotic characteristics. Length data were analyzed as continuous size spectra characterized by their maximum-likelihood estimated exponents b. First, we examined the relationship between size spectra obtained from the two sampling methods. We then examined whether size spectra from the two methods were correlated with lake descriptors separately or in combination. The modeled relationship between the exponents b from the two methods showed that the exponent b from the hydroacoustics was, on average, the same as that from the gillnet sampling in the seven lakes. The exponents b from the hydroacoustics and gillnets, when averaged, were significantly correlated with lake depth, while their differences were significantly correlated with mean air temperature. To conclude, the overall good correspondence between the continuous size distributions obtained by both methods supports the application of vertical hydroacoustics in acquiring size structure of fish communities in lakes, but not in fully replacing the invasive gillnetting. Yet, some specific methodological details require further research.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10617 - Marine biology, freshwater biology, limnology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Canadian Journal of Fisheries and Aquatic Sciences

ISSN

0706-652X

e-ISSN

1205-7533

Svazek periodika

79

Číslo periodika v rámci svazku

Jul

Stát vydavatele periodika

CA - Kanada

Počet stran výsledku

12

Strana od-do

2179-2190

Kód UT WoS článku

000887853600001

EID výsledku v databázi Scopus

2-s2.0-85143237632