The expansion of invasive species to the East: new sites of the bullheads (genus Ameiurus Rafinesque 1820) in Ukraine with morphological and genetic identification.

Autor: Kutsokon Y; Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia.; Schmalhausen Institute of Zoology, National Academy of Sciences of Ukraine, Kyiv, Ukraine., Bielikova O; Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia.; Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine, Kyiv, Ukraine., Pekárik L; Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia., Roman A; Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kyiv, Ukraine., Shcherbatiuk M; Kholodny Institute of Botany, National Academy of Sciences of Ukraine, Kyiv, Ukraine., Čiamporová-Zaťovičová Z; Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia., Čiampor F Jr; Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia.
Jazyk: angličtina
Zdroj: Journal of fish biology [J Fish Biol] 2024 Sep; Vol. 105 (3), pp. 708-720. Date of Electronic Publication: 2024 Jun 04.
DOI: 10.1111/jfb.15778
Abstrakt: This study confirms the extended distribution of two invasive species of the genus Ameiurus in Ukraine. Specifically, A. melas is recorded for the first time in the Southern Buh basin and A. nebulosus has expanded further eastward within the Dnipro basin. Material collected in 2019 and 2022 was identified by morphological features and confirmed by molecular genetic analysis. The most reliable morphological characters for distinguishing these two species include anal-fin membrane pigmentation (light or black), gill raker count (fewer or more than 16), and serrations on the pectoral-fin spine (well-developed along the full length or small, absent near the tip). The analysis of the cytochrome oxidase subunit I barcoding marker identified all samples from the Dnipro Basin (Tnia and Velykyi Luh localities) as A. nebulosus, while all specimens from the Vinnytsia region within the Southern Buh basin (Sotskoho and Vyshenske lakes) were attributed to A. melas. The maximum-likelihood analysis revealed clearly separated clades with high bootstrap support (>75%), strongly supporting the presence of the two separate species. This study suggests the potential for further eastward expansion of both species within Ukraine: A. nebulosus in the northern direction and A. melas in the southern direction.
(© 2024 Fisheries Society of the British Isles.)
Databáze: MEDLINE
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