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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10617 - Marine biology, freshwater biology, limnology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

Canadian Journal of Fisheries and Aquatic Sciences

ISSN

0706-652X

e-ISSN

1205-7533

Volume of the periodical

79

Issue of the periodical within the volume

Jul

Country of publishing house

CA - CANADA

Number of pages

12

Pages from-to

2179-2190

UT code for WoS article

000887853600001

EID of the result in the Scopus database

2-s2.0-85143237632