Abstract

A new finding of Thermocyclops taihokuensis (Harada, 1931) in European Russia is described. In October 2019, the East Asian copepod T. taihokuensis (Harada, 1931) was first recorded in the Shat Reservoir (54° N, 38° E) of the Oka River system. The Oka River is the right-bank tributary to the Volga River. The population of T. taihokuensis exceeded 100 000 ind./m³. The species actively reproduced at a water temperature of 13°C, sexually mature females with eggs in egg pouches accounted for 45% of their total number, and fecundity reached 17 ± 1 eggs per female. The Shat Reservoir is the westernmost habitat of the species in European Russia. It is assumed that the probability of further expansion of this species downstream the Oka River into the reservoirs of the midstream and downstream Volga is high.

中文翻译：

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冈江流域的太白热圈菌（甲壳纲，Co足类）的第一个记录

摘要

描述了在欧洲的俄罗斯发现新发现的太白热循环菌（原田，1931年）。2019年10月，东亚co足类动物T.taihokuensis（原田，1931年）首次记录在奥卡河水系的Shat水库（北纬54°，东经38°）中。奥卡河是伏尔加河的右岸支流。太白山。的种群数量超过100000 ind./m ³。该物种在13°C的水温下活跃繁殖，雌性性成熟的雌性带卵袋的卵占卵总数的45％，繁殖力达到每个雌性17±1个卵。沙特水库是欧洲俄罗斯物种最西端的栖息地。假定该物种进一步在奥卡河下游扩散到伏尔加河中游和下游的水库的可能性很高。