Fomina, Y.Y. & M.T. Syarki. (2022). Life cycle of the copepod, Limnocalanus macrurus Sars 1863 (Copepoda, Calaniformes, Centropagidae) in Lake Onego. Zoologichesky Zhurnal. 101(1):3-13. [Russian}, [English translantion of Fomina, Y.Y. & M.T. Syarki. (2022). Life cycle of the copepod, Limnocalanus macrurus Sars 1863 (Copepoda, Calaniformes, Centropagidae) in Lake Onego. Biology Bulletin. 49(9):1261-1270. Jan 2022].
Life cycle of the copepod, Limnocalanus macrurus Sars 1863 (Copepoda, Calaniformes, Centropagidae) in Lake Onego.
Zoologichesky Zhurnal
101(1):3-13. [Russian}, [English translantion of Fomina, Y.Y. & M.T. Syarki. (2022). Life cycle of the copepod, Limnocalanus macrurus Sars 1863 (Copepoda, Calaniformes, Centropagidae) in Lake Onego. Biology Bulletin. 49(9):1261-1270. Jan 2022]
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Limnocalanus macrurus Sars 1863 (Calaniformes, Centropagidae Giesbrecht 1892) is a glacial marine relict species. In the pelagic zone of Lake Onego, one of the European Great Lakes, this copepod is one the main dominant species of zooplankton during the whole year. Limnocalanus macrurus has been found to be a monocyclic species with one generation and winter reproduction. The main characteristics of the copepod life cycle have been studied based on long-term observations. The population of L. macrurus in the Petrozavodsk Bay and the central part of the lake shows some characteristic features. Thus, during the growing season the average values of abundance are 2 times lower in the bay compared to the central part of the lake (2.7 versus 5.5 th. ind./m2 , respectively). The same tendency was observed in relation to biomass (0.82 versus 1.36 g/m2 , respectively). A comparison of the average long-term maximal values of abundance and biomass in these parts of the lake also shows that the abundance values are 1.6 times (5.6 versus 9.0 g/m2 ), while the biomass values 2 times lower (1.41 versus 2.83 g/m2 ) in the Petrozavodsk Bay compared to the central part. A shift earlier by 2–3 dozen days in the timing of the spring development of L. macrurus in the Petrozavodsk Bay has been recorded due to the difference in the thermal regimes of the areas compsared. Despite the climatic changes noted in recent decades, no noticeable changes in the abundance of L. macrurus in the lake have been revealed.
Keywords: marine glacial relict, zooplankton, seasonal dynamics, Karelia
