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Real-time distribution of pelagic fish: combining hydroacoustics, GIS and spatial modelling at a fine spatial scale

Understanding spatial distribution of organisms in heterogeneous environment remains one of the chief issues in ecology. Spatial organization of freshwater fish was investigated predominantly on large-scale, neglecting important local conditions and ecological processes. However, small-scale process...

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Autores principales: Muška, Milan, Tušer, Michal, Frouzová, Jaroslava, Mrkvička, Tomáš, Ricard, Daniel, Seďa, Jaromír, Morelli, Federico, Kubečka, Jan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5876353/
https://www.ncbi.nlm.nih.gov/pubmed/29599464
http://dx.doi.org/10.1038/s41598-018-23762-z
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author Muška, Milan
Tušer, Michal
Frouzová, Jaroslava
Mrkvička, Tomáš
Ricard, Daniel
Seďa, Jaromír
Morelli, Federico
Kubečka, Jan
author_facet Muška, Milan
Tušer, Michal
Frouzová, Jaroslava
Mrkvička, Tomáš
Ricard, Daniel
Seďa, Jaromír
Morelli, Federico
Kubečka, Jan
author_sort Muška, Milan
collection PubMed
description Understanding spatial distribution of organisms in heterogeneous environment remains one of the chief issues in ecology. Spatial organization of freshwater fish was investigated predominantly on large-scale, neglecting important local conditions and ecological processes. However, small-scale processes are of an essential importance for individual habitat preferences and hence structuring trophic cascades and species coexistence. In this work, we analysed the real-time spatial distribution of pelagic freshwater fish in the Římov Reservoir (Czechia) observed by hydroacoustics in relation to important environmental predictors during 48 hours at 3-h interval. Effect of diurnal cycle was revealed of highest significance in all spatial models with inverse trends between fish distribution and predictors in day and night in general. Our findings highlighted daytime pelagic fish distribution as highly aggregated, with general fish preferences for central, deep and highly illuminated areas, whereas nighttime distribution was more disperse and fish preferred nearshore steep sloped areas with higher depth. This turnover suggests prominent movements of significant part of fish assemblage between pelagic and nearshore areas on a diel basis. In conclusion, hydroacoustics, GIS and spatial modelling proved as valuable tool for predicting local fish distribution and elucidate its drivers, which has far reaching implications for understanding freshwater ecosystem functioning.
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spelling pubmed-58763532018-04-02 Real-time distribution of pelagic fish: combining hydroacoustics, GIS and spatial modelling at a fine spatial scale Muška, Milan Tušer, Michal Frouzová, Jaroslava Mrkvička, Tomáš Ricard, Daniel Seďa, Jaromír Morelli, Federico Kubečka, Jan Sci Rep Article Understanding spatial distribution of organisms in heterogeneous environment remains one of the chief issues in ecology. Spatial organization of freshwater fish was investigated predominantly on large-scale, neglecting important local conditions and ecological processes. However, small-scale processes are of an essential importance for individual habitat preferences and hence structuring trophic cascades and species coexistence. In this work, we analysed the real-time spatial distribution of pelagic freshwater fish in the Římov Reservoir (Czechia) observed by hydroacoustics in relation to important environmental predictors during 48 hours at 3-h interval. Effect of diurnal cycle was revealed of highest significance in all spatial models with inverse trends between fish distribution and predictors in day and night in general. Our findings highlighted daytime pelagic fish distribution as highly aggregated, with general fish preferences for central, deep and highly illuminated areas, whereas nighttime distribution was more disperse and fish preferred nearshore steep sloped areas with higher depth. This turnover suggests prominent movements of significant part of fish assemblage between pelagic and nearshore areas on a diel basis. In conclusion, hydroacoustics, GIS and spatial modelling proved as valuable tool for predicting local fish distribution and elucidate its drivers, which has far reaching implications for understanding freshwater ecosystem functioning. Nature Publishing Group UK 2018-03-29 /pmc/articles/PMC5876353/ /pubmed/29599464 http://dx.doi.org/10.1038/s41598-018-23762-z Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Muška, Milan
Tušer, Michal
Frouzová, Jaroslava
Mrkvička, Tomáš
Ricard, Daniel
Seďa, Jaromír
Morelli, Federico
Kubečka, Jan
Real-time distribution of pelagic fish: combining hydroacoustics, GIS and spatial modelling at a fine spatial scale
title Real-time distribution of pelagic fish: combining hydroacoustics, GIS and spatial modelling at a fine spatial scale
title_full Real-time distribution of pelagic fish: combining hydroacoustics, GIS and spatial modelling at a fine spatial scale
title_fullStr Real-time distribution of pelagic fish: combining hydroacoustics, GIS and spatial modelling at a fine spatial scale
title_full_unstemmed Real-time distribution of pelagic fish: combining hydroacoustics, GIS and spatial modelling at a fine spatial scale
title_short Real-time distribution of pelagic fish: combining hydroacoustics, GIS and spatial modelling at a fine spatial scale
title_sort real-time distribution of pelagic fish: combining hydroacoustics, gis and spatial modelling at a fine spatial scale
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5876353/
https://www.ncbi.nlm.nih.gov/pubmed/29599464
http://dx.doi.org/10.1038/s41598-018-23762-z
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