Exspansion of the East Asian Species Thermocyclops taihokuensis (Crustacea, Copepoda, Cyclopoida) in the Kama River (Russia)

In August 2018–2023, the composition of copepods of the Kama River was studied within the Volga–Kama and Kama Reaches of the Kuibyshev Reservoir, as well as the Nizhnekamsk and Votkinsk reservoirs. It was established that the East Asian species T. taihokuensis (Harada, 1931) first recorded at the mouth of the Kama River in 2018, and by 2023 it had colonized the Volga–Kama reach. In 2022, the invader was first registered in the lower section of the Kamsky reach of the Kuibyshev Reservoir and the Nizhnekamsk Reservoir. The northern border of the invader's distribution is located near the mouth of the Belaya River (56° N) 320 km from the confluence of the Kama and Volga rivers.