Modern composition of alien fish species in the Kuybyshev reservoir and possible introduction of new representatives into its ecosystem

Alien Species of Fish in the Littoral of Volga and Kama Reservoirs (Results of Complex Expeditions of IBIW RAS in 2005-2017)

“…The northermost catch of a single specimen was made in the upper part of the Kamsky reach of the Kuibyshev water reservoir. This species is probably more widely represented in the reservoirs of the Volga-Kama cascade, but this information requires verification [Shakirova, 2015].…”

“…Pathways of dispersal of species with latitudinal expansion of ranges along Volga as well as those penetrating into Kama pass through this reservoir . As a result, of these processes, up to a third of the ichthyofauna of the Kuibyshev water reservoir is represented by alien species [Shakirova et al, 2015]. Thanks to this strategic position of the Kuibyshev reservoir, there is a possibility of "mixing" of different phylogenetic lineages of some species of invasive fish (for example, different lineages of pipefish and gobies), which creates additional difficulties for studying their population-genetic structure.…”

“…DNA-barcoding of these fish [Kodukhova et al, 2016] did not confirm the idea that Volga's population of stellate tadpole goby is represented by Don River species B. durrelli [Boldyrev, Bogutskaya, 2007]. By now, stellate tadpole goby is regularly found in the reservoirs of the Lower and Middle Volga [Kasyanov, Klevakin, 2011;Shakirova et al, 2015], in the Cheboksary reservoir within the territory of Nizhniy Novgorod area (Klevakin et al, 2005), and a single adult specimen was caught in the Rybinsk Reservoir [Kodukhova et al, 2016].…”

“…In extremely rare cases, this species is observed in shallow, overgrown areas of Volga River reservoirs [Kasyanov, Goroshkova, 2012]. There are data [Shakirova et al, 2015] on the existence of a large number of Amur sleepers populations in the Staromaynsky Bay of the Kuibyshev Reservoir. Also, according to the literature [Semenov, 2010(Semyonov, 2010], the Amur sleeper is sporadically found in many overgrown bays and inundations of the Kuibyshev reservoir, but not in the open water area and the course.…”

The adventive species community changes in the Cheboksary reservoir during 2001-2021

“…There are a lot of studies about adventive fishes in the Volga and Kama basins devoted to single species and reservoirs [7][8][9] or generalizing to all cascade and the region [10,11].…”