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Population dynamics and feeding ecology of the western tubenose goby (Proterorhinus semilunaris) in the Stugna River, Dnieper River basin, Ukraine

Didenko Alexander, Volikov Yurij, Gurbyk Alexander, Kruzhylina Svitlana, Buzevych Igor, Bekh Vitaliy

Oceanological and Hydrobiological Studies

2024

Vol. 53, No. 1

61--70

The study investigated the inter-annual and seasonal population dynamics, as well as the feeding habits of the western tubenose goby Proterorhinus semilunaris in an invaded river close to its natural range (Dnieper River basin). Material was collected monthly in 2015–2016 and 2018 at one sampling site located in the Stugna River, at a distance of 1100 m from the point where it enters the Kaniv reservoir. Catch-per-unit-efforts (CPUE) of this species at the sampling site varied considerably, both between different months within a given year and between the analyzed years, from 1.1 to 127.1 fish 100 m-2. Peak abundances were observed in July in both 2015 and 2018, and then dropped sharply in the following months. The western tubenose goby is characterized by a protracted spawning season, lasting from April to July. A total of 50 prey taxa were recorded in the diet of the western tubenose goby at the sampling site, among which chironomids were the most abundant and most frequently encountered, followed by cladocerans. This gobiid at the sampling site preyed mainly among submerged vegetation, where phytophilous chironomids were the most important prey.

The uselessness of cytochrome oxydase gene analysis for genetic identification of selected Gobiidae species from some European countries

Kiełpińska Jolanta, Czerniejewski Przemysław, Adamkowska Natalia, Uzunova Eliza

Journal of Water and Land Development

2022

Special Issue

8--14

The family Gobiidae is the largest teleost family, consisting of more than 2,000 species in more than 200 genera. They have adapted to a wide range of habitats, inhabiting mostly marine and brackish waters. Recently invasive Ponto-Caspian gobies have caused significant changes to the structure of fish assemblage throughout the European waters. The aim of the study was to verify the possibility of identifying three species of the genus Gobiidae based on the analysis of the mitochondrial region of the cytochrome oxidase subunit 1 (COI) gene. 339 samples originated from seven countries and 17 different sites were investigated. Qualitative and quantitative assessment of the extracted DNA was conducted by measuring light absorbance and electrophoretic separation. Approximately 650-bp (base pairs) fragments were amplified from the 5' region of the mitochondrial COI with the PCR (polymerase chain reaction) reaction. Sequences of 652 bp were obtained and compared with reference sequences in the National Center for Biotechnology Information (NCBI). Based on the sequence analysis, we determined that in the analysed geographical regions, the goby preliminary identified morphologically as the round goby was represented by three species: round goby (Neogobius melanostomus), tubenose goby (Proterorhinus marmoratus), and monkey goby (Neogobius fluviatilis). The latter two are newly reported for their new habitats. Genetic characterisation of such populations offers the opportunity to assess their genetic stability, which provides agencies managing the aquatic environment in EU countries with a tool for revising the legislation, including regulations relevant for updating the status of native and invasive species in European waters.

A seasonal pattern of occurence of gobiid fish- (Gobiidae) in the shallow littoral zone (0-1m depth) of Puck Bay

Horackiewicz J., Skóra K.E.

Oceanological Studies

1998

Vol. 27, No. 3

3-17

In the years 1993-1995, investigations of the variability in occurrence of gobiids in the shallowest part of Puck Bay (0-1 m depth) were conducted. Three species of gobiids, Pomatoschistus minutus, Pomatoschistus microps and Neogobius melanostomus were identified. Abundance, biomass and species distribution varied with time and sampling location. P. microps was a dominant species all year round and accounted for over 80% of all fish caught. An apparent preference of P. microps for inhabiting the internal part of Puck Bay was observed while P. minutus was found more frequently in the external part of Bay. In the coastal zone, fish from genus Pomatoschistus showed seasonality of occurrence with the abundance peak in the fall.