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Original scientific paper

https://doi.org/10.2478/cjf-2023-0018

FLUCTUATING ASYMMETRY IN MORPHOLOGICAL CHARACTERS OF THE INVASIVE ROUND GOBY Neogobius melanostomus POPULATIONS FROM DIFFERENT HABITATS OF THE SAVA RIVER BASIN, CROATIA

Valentine Planchet ; University of Montpellier, L'institut Agro Montpellier, Montpellier, France
Ivan Špelić orcid id orcid.org/0000-0003-0205-1736 ; University of Zagreb Faculty of Agriculture, Department of Fisheries, Apiculture, Wildlife Management and Special Zoology, Zagreb, Croatia
Marina Piria orcid id orcid.org/0000-0001-6324-9282 ; University of Zagreb Faculty of Agriculture, Department of Fisheries, Apiculture, Wildlife Management and Special Zoology, Zagreb, Croatia Department of Ecology and Vertebrate Zoology, Faculty of Biology and Environmental Protection, University of Łódź, Łódź, Poland


Full text: croatian pdf 1.236 Kb

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Abstract

Round goby Neogobius melanostomus is one of the three invasive Ponto-Caspian gobies found in the Sava River basin in Croatia. It has a negative effect on the native ecosystems and is more abundant in highly polluted areas. The objective of this study was to determine the fluctuating asymmetry of four morphometric characters, as well as otolith width and length. Thirty individuals of N. melanostomus were collected and analysed at two sampling sites in the main course of the Sava (Babina Greda, Slavonski Brod) and in a modified habitat (Sava-Odra canal). The squared coefficient of asymmetry variation was used to analyse potential differences between populations. We identified variations in the asymmetry values of the analysed characters, as well as otolith width and length between sampling sites. The highest fluctuating asymmetry was observed in individuals at the Babina Greda sampling site, which could be due to high environmental stress. The results of the study show that the study of fluctuating asymmetry can be used on invasive fish species as a simple approach to identifying habitat quality.

Keywords

bilateral asymmetry; invasive fish; environmental stress; bioindicator

Hrčak ID:

309821

URI

https://hrcak.srce.hr/309821

Publication date:

1.12.2023.

Article data in other languages: croatian

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