Genetic data reveal unexpected relationships among European freshwater species of the Gobius-lineage
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1
Faculty of Science, Charles University, Department of Ecology, Czechia
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2
National Museum (Czechia), Czechia
Gobiidae is one of the largest families of teleost fishes with nearly 2000 currently recognized species. Gobies have a worldwide distribution with exception of Arctic and Antarctic areas. In Europe, three independent evolutionary lineages occur: – Gobius -, Pomatoschistus - and Aphia - lineage. Some species of this primarily marine fishes adapted to the freshwaters. They belong to the Gobius – and Pomatoschistus – lineages. The freshwater species from the Gobius – lineage are representatives of the monophyletic clade of benthophilines (the species flock of gobies from the Ponto-Caspian region) and the genus Padogobius from the Adriatic – Tyrrhenian area. There are molecular works which suggest that the genus Padogobius might not be monophyletic. The aim of this work was to test the monophyly of the genus Padogobius and reveal its relationships with the rest of the species of the Gobius – lineage. For this purpose, 2 mitochondrial and 2 nuclear markers were analyzed.
The results of mitochondrial and nuclear markers are consistent and confirm that the genus Padogobius is not monophyletic. Padogobius nigricans s belongs to the genus Neogobius and Padogobius bonelii remains the only species of this genus. However, its relationships with the other species of the Gobius – lineage remain unresolved. Padogobius nigricans belongs to the group that has a Ponto – Caspian distribution, although it inhabits the Tyrrhenian area. Its closest relatives inhabit the fresh and brackish waters around the Black Sea. According to the results based on cytochrome b, it seems that Neogobius nigricans dispersed to Apennine peninsula after the radiation of the genus in the Ponto – Caspian region. Molecular dating suggests that the dispersion might have happened at the beginning of Pliocene, 5 – 4 million years ago.
Acknowledgements
GAUK n. 1192217
Keywords:
Padogobius,
adaptation to freshwaters,
phylogenetic relationships,
Benthophilinae,
Phylogeography
Conference:
XVI European Congress of Ichthyology, Lausanne, Switzerland, 2 Sep - 6 Sep, 2019.
Presentation Type:
Poster
Topic:
TAXONOMY, PHYLOGENY AND ZOOGEOGRAPHY
Citation:
Slámová
T,
Šanda
R and
Vukić
J
(2019). Genetic data reveal unexpected relationships among European freshwater species of the Gobius-lineage.
Front. Mar. Sci.
Conference Abstract:
XVI European Congress of Ichthyology.
doi: 10.3389/conf.fmars.2019.07.00156
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Received:
27 May 2019;
Published Online:
14 Aug 2019.
*
Correspondence:
Mrs. Tereza Slámová, Faculty of Science, Charles University, Department of Ecology, Prague, Prague, 128 43, Czechia, slamovt@natur.cuni.cz