Species Composition, Distribution and Ecological Features of Ichthyofauna in the Pymvashor Geothermal Valley (Bolshezeme
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ies Composition, Distribution and Ecological Features of Ichthyofauna in the Pymvashor Geothermal Valley (Bolshezemelskaya Tundra, Nenets Autonomous Okrug) A. P. Novoselova, *, O. V. Aksenovaa, c, I. N. Bolotova, b, N. G. Skyuttea, V. V. Anufrieva, and M. V. Sursoa aLaverov
Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, Arkhangelsk, Russia b Northern (Arctic) Federal University, Arkhangelsk, Russia c Saint Petersburg State University, Saint Petersburg, Russia *e-mail: [email protected]
Received June 14, 2019; revised August 27, 2019; accepted October 17, 2019
Abstract—Ichthyofauna in the studied streams in the Pymvashor Geothermal Valley contains six species from six families; the basis of the fish assemblage is formed by three species such as European grayling Thymallus thymallus, common minnow Phoxinus phoxinus and stone loach Barbatula barbatula. Fish distribution patterns are expressed well in spatial and seasonal aspects. Fish inhabiting water bodies in the Pymvashor Geothermal Valley belong to two faunal complexes with prevalence of species of the boreal piedmont complex; three groups are distinguished in respect to the feeding habits, i.e. benthophagous, predatory, and euryphagous fishes. Species which lay eggs on rocky-pebbly substrates in late spring and early summer prevail. According to the economic status three fish species are non-commercial; common bullhead is listed in the regional Red Data Book of the Nenets Autonomous Okrug. Keywords: Pymvashor Geothermal Valley, species diversity, spatial and seasonal distribution, faunal complexes, patterns of feeding and reproduction DOI: 10.1134/S0032945220040128
In conditions of long-term environmental degradation the problem of fish population inventory becomes especially urgent and the information on the ichthyofauna composition may be used in the development of national and regional programs for the study and conservation of biological diversity (Reshetnikov and Shatunovskii, 1997; Sokolov and Reshetnikov, 1997). In addition, the updated data from regional fish catalogues may be the basis for compiling a comprehensive list of fish in continental water bodies of Russia. Numerous occurrences of fishes at rather high temperatures to 32–40°С are reported in the body of literature (Bolotov et al., 2016). Among freshwater fish along with species that prefer rather narrow temperature ranges, there are also species with broader ranges of the final selected temperature. The results of integrated studies on the effect of the thermogradient on behavior, feeding, and physiological adaptations of fish under natural and artificial conditions are presented in a number of publications (Brown and Feldmeth, 1971; Poddubnyi et al., 1978; Golovanov and Bazarov, 1981; Golovanov and Linnik, 1981; Goolish and Adelman, 1984; Ponomarev, 1991, 1995; Golovanov, 1996, 2003, 2012; Malinin et al., 1996, Svirskii,
1996; Golovanov et al., 2005, 2012; Kishi et al., 2005; Bohlen et al., 2008; Darveau et al., 2012; Akbarza
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