Formation and development of the Black Sea-Caspian kilka Clupeonella cultriventris (Clupeidae) in the Rybinsk reservoir

A Dataset of Non-Indigenous and Native Fish of the Volga and Kama Rivers (European Russia)

“…It is a Ponto-Caspian species demonstrating a maximally wide acquired distribution area among all non-indigenous species. Moreover, it has a high density and frequently dominates, and even sometimes is super-dominant, in the pelagic zone of most reservoirs, demonstrating strong long-term (6-8 years) cyclic population outbreaks in the reservoirs of Upper Volga [29], while such significant fluctuations are not known for Middle Volga (which is confirmed by our records). In the latter area, Tyulka is already well-adapted to local environment conditions and occupies a stable position in the fish community.…”

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

“…At present, common is a dominant species (and often a super-dominant) in the pelagic part of the fish community of Volga reservoirs. This species is characterized by multi-year cycles (6-8 years) of abundance in the reservoirs of the Upper Volga [Kiyashko et al, 2012]. For the reservoirs of the Middle Volga, such powerful "waves of life" are not noted, which is confirmed by both our and literary data.…”

“…However, the absence of yearlings and any significant catches of this species does not allow concluding the successful settlement of kilka in this waterbody. Probably, a key role in limiting the distribution of common kilka to the north is played by the change in abiotic (temperature, mineralization, hydrological regime) and biotic factors (quantity and quality of food consumed, availability of food rivals and predators) [Kiyashko et al, 2012]. Another hypothesis [Martemyanov, Borisovskaya, 2010] states that decrease of mineralization in the northern waterbodies along with a decrease in the concentration of sodium in water leads to an increase in the tensions of intracellular systems providing sodium homeostasis and in the degree of kilka's vulnerability to abrupt changes in the mineralization.…”