Abstract
In this paper, the fish assemblage of the lower flow of the Tyligul River (173 km length), North-Western Black Sea basin is described. Studies were conducted at the Odessa region in 2012 and 2014. The riverbed in there sites is overgrown, boggy, and the salinity is up to 2 ‰. In total, 12 fish species from four families were registered from 690 specimens. Some of the materials are transferred to the collection fund of the National Museum of Natural History of NAS of Ukraine in Kyiv. This is the first collection of samples in the museum collections of the basin, excluding Tyligul Estuary, it has high salinity and therefore is close to marine fish fauna. The fish assemblage includes two introduced species, the stone moroko Pseudorasbora parva (Temminck et Schlegel, 1846), and the Prussian carp Carassius gibelio (Bloch, 1782), while the others are native. The most numerous species were the belica, Leucaspius delineatus (Heckel, 1843) and the stone moroko. Predominant fish limnophyls are unpretentious to the oxygen content in water. Some of Ukrainian sticklebacks Pungitius platygaster (Kessler, 1859) had parasites Lernaea cf . elegans (Copepoda: Lerneidae), and the majority of the studied specimens were infected. Species belonging to white-fin gudgeon Romanogobio sp. from Tyligul is controversial and needs further investigation as river basin is on the verge of habitat of several species of the genus. Keywords: Tyligul River, fish, assemblage, Northern Black Sea, museum collections.
Highlights
The determination of flora and fauna communities is important for the natural protection of particular territories and water bodies and for the economic activities on these localities
It concerns small rivers near the coast, traditionally more attention given to study of marine fish species which are important for fisheries
In the ichthyological collection of the Zoological Museum of the Natural History Museum of NAS of Kyiv, Ukraine, we did not find any fishes marked as caught in the Tyligul River
Summary
The determination of flora and fauna communities is important for the natural protection of particular territories and water bodies and for the economic activities on these localities. Kvach fauna is not presented in the museum collections It concerns small rivers near the coast, traditionally more attention given to study of marine fish species which are important for fisheries. There are two such regions in Ukraine: North-West Black Sea and North Azov Sea.The steppe rivers of the Northern Azov coast are studied much better [4, 5]. The Tyligul is one of rivers of the North-Western Black Sea coast, which are less studied. In the ichthyological collection of the Zoological Museum of the Natural History Museum of NAS of Kyiv, Ukraine, we did not find any fishes marked as caught in the Tyligul River. The ichthyofauna of the river and the estuary is very different because of the different water salinity, which is about 30 ‰ in the estuary
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