Ecosystem Transformation (), 79-105

Mercury content in the muscles of the European perch Perca fluviatilis L., 1758 of different ages from water bodies and streams of the Oka Nature Reserve

Kotikov D.E. , Gremyachikh V.A., Kamshilova T.B., Ivancheva E.Yu.  , Ivanchev V.P.  , Komov V.T.  

The total mercury (Hg) content in the muscles of European perch of different ages from water bodies and streams of the Oka Nature Reserve was studied. The material was collected in 2006–2016. A total of 222 individuals from five groups of water bodies were analyzed: the Pra River, other rivers, floodplain lakes, non‑floodplain lakes, and a reclamation ditch. Hg concentrations were determined by atomic absorption spectrometry, and age was determined from opercula (gill covers). Considerable variability in Hg content (from 0.02 to 0.68 mg/kg wet weight) was revealed. The highest mean concentrations were recorded in the Pra River (0.30 mg/kg) and the reclamation ditch (0.24 mg/kg), and the lowest in other rivers (0.14 mg/kg). The intensity of Hg accumulation is highest during the first two years of life, which coincides with the perch’s shift to piscivory. Differences in the dynamics of Hg accumulation among the groups of water bodies were found. Mean concentrations in the Pra River were at the maximum permissible level, while maximum concentrations exceeded it. The results highlight the importance of considering the age structure of the population when assessing mercury pollution of aquatic ecosystems.

D. E. Kotikov
I.D. Papanin Institute of Biology of Inland Waters, Russian Academy of Sciences
Borok 109, Nekouz District, Yaroslavl Oblast, 152742 Russia

daniil-kotikov@mail.ru

V. A. Gremyachikh
I.D. Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, senior research scientist
Borok 109, Nekouz District, Yaroslavl’ Region, 152742 Russia

PhD in Biology

T. B. Kamshilova
I.D. Papanin Institute of Biology of Inland Waters, Russian Academy of Sciences
Borok 109, Nekouz District, Yaroslavl Oblast, 152742 Russia


E. Yu. Ivancheva
Oka State Nature Biosphere Reserve, leading research scientist
Brykin Bor 51, Spassky District, Ryazan Region, 391072 Russia

PhD in Biology
eivancheva@mail.ru

V. P. Ivanchev
Oka State Nature Biosphere Reserve, deputy director of research
Brykin Bor 51, Spassky District, Ryazan Region, 391072 Russia

PhD in Biology
ivanchev.obz@mail.ru

V. T. Komov
I.D. Papanin Institute for Biology of Inland Waters, principal research scientist
Borok 109, Nekouz District, Yaroslavl Region, 152742 Russia

Cherepovets State University
Pr. Lunacharskogo 5, Cherepovets, Vologda Region, 162600

Doctor of Science in Biology, Professor
vkomov@ibiw.yaroslavl.ru

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