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Journal "Inland Water Biology"

№ 3 за 2013 год

S.I. Genkal*, G.I. Popovskaya**, E.Y. Osipov**, N.A. Onischuk**, Ye.V. Likhoshway**

Bacillariophyta in mountainous water bodies of the Barguzin Ridge.

*Institute for Biology of Inland Waters RAS, 152742 Borok, Russia


**Limnological Institute, Siberian Branch, Russian Academy of Sciences, 664033 Irkutsk, ul. Ulan-Batorskaya, 3, P.O. Box 278

e-mail: genkal@ibiw.yaroslavl.ru

The species composition of Bacillariophyta in mountain glacial lakes of the Barguzin Range (the Cis-Baikal Region) is studied for the first time. More than 200 taxa including new for the flora of Russia (60) are found. The predominance of representatives of the class Pennatophyceae (92%) in the species composition is recorded. The problem of discovering Baikal endemics in high-mountain waterbodies is considered.

Keywords: phytoplankton, diatom algae, high-latitude lakes, Barguzin mountain ridge.

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V.G. Gagarin, V.A. Gusakov

Two Species of Dorylaimids (Nematoda) from Water Bodies of Vietnam.

Institute for Biology of Inland Waters RAS, 152742 Borok, Russia

e-mail: gagarin@ibiw.yaroslavl.ru

Illustrated descriptions of two species of free-living nematodes: Crocodorylaimus minor sp.n. and Aporcella maitai (Yeates, 1967) comb. nov. found in lakes of Vietnam. C. minor sp.n. resembles C. dadayi (Thorne, Schwanger, 1936), but differs from it by a shorter body and odontostyle, another shape of vulva, absence of vulvar papillae, more slender tail in females and shorter spicules in males. Aporcelaimellus maitai Yeates, 1967 is transfered to the genus Aporcella Andrássy, 2002: Aporcella maitai (Yeates, 1967) comb. nov. Aporcelaimellus heynsi Baqri, Jairajpuri, 1968 and Aporcelaimellus glandus Botha, Heyns 1991 synonymized with Aporcella maitai (Yeates, 1967). A keys to the valid species of the genera Crocodorylaimus and Aporcella are given.

Keywords: Vietnam, fresh waterbodies, free-living nematodes, taxonomy, new species, Crocodorylaimus minor sp.n., Aporcella maitai (Yeates, 1967) comb. nov..

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L.M. Kipriyanova*, R.E. Romanov**

Communities of Charophytes in Waterbodies and Water Courses in the North of Endorheic Basin of the Ob-Irtysh Interfluve (Western Siberia).

*Institute for Water and Environmental Problems SB RAS, Novosibirsk Branch, 630090 Novosibirsk, Morskoy prospect, 2, Russia


**Central Siberian Botanical Garden SB RAS, 630090 Novosibirsk, ul. Zolotodolinskaja, 101, Russia

e-mail: kipr@iwep.nsc.ru

As a result of investigations in sixty lakes in the north of endorheic basin of the Ob-Irtysh interfluve (Western Siberia) in 2001–2009 nine syntaxa (types of plant communities) of the association rank Charetum fragilis, Charetum contrariae, Charetum intermediae, Charetum tomentosae, Charetum asperae, Nitellopsidetum obtusae, Charetum canescentis, Charetum altaicae, Charetum vulgaris were distinguished using the Braun-Blanquet approach. Comparatively low cenotic diversity is due to the predominance of brackish and saline lakes in the surveyed area. Charetum fragilis is the most common in the forest-steppe zone, Charetum tomentosae and Charetum canescentis are frequent in the steppe zone. The ranges of salinity for charophytes species and communities were estimated. Сharophytes in the area under study grew successfully and formed communities in eutrophic and even hypertrophic waters.

Keywords: Stoneworts, charophytes, Chara, lakes, Novosibirsk region, mineralization, salinity, Charetea fragilis.

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O.S. Burmistrova*, N.I. Ermolaeva**

Zooplankton of Altai High-mountain lakes.

*Institute for Water and Environmental Problems SB RAS, 656038 Barnaul, ul. Molodezhnaya, 1, Russia


**Institute for Water and Environmental Problems SB RAS, 630090 Novosibirsk, Morskoy pr., 2, Russia

e-mail: burmolga@yandex.ru

In July–August 1999–2001, 53 zooplankton species were found in Altai high-mountain lakes (1800–2400 m above sea level). The abundance of zooplankton varies considerably; however, its average number and biomass are low. According to zooplankton characteristics the high-mountain lakes refer to oligotrophic and oligosaprobic ones. The species composition of the zooplankton community depends on the area and the depth of the lakes, and the quantitative indices, particularly in the littoral zone, are determined by water temperature.

Keywords: high-mountain lakes, zooplankton, species, abundance.

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А.V. Krylov*, Yu.V. Gerasimov*, B.K. Gabrielyan**, E.S. Borisenko***, S.A. Hakobyan**, А.А. Nikogosyan**, М.I. Malin*, А.А. Ovsepyan**

Zooplankton in lake Sevan During the Period of High water level and Low fish density.

*Institute for Biology of Inland Waters RAS, 152742 Borok, Russia


**Institute of Hydroecology and Ichthyology, NAS Armenia, 0014 Yerevan, ul. Paruira Sevaka, 7, Republic of Armenia


***А. N. Severtsov Institute of Ecology and Evolution RAS, 119071 Moscow, Leninskij prosp., 33, Russia

e-mail: krylov@ibiw.yaroslavl.ru

It is shown that in 2011 during flooding of reservoirs in the coastal region and formation of new warmed up sites of the shoal due to raising of the water level in Lake Sevan, the species typical for temporary waterbodies and different shoals were recorded in the zooplankton composition. Among them Daphnia (Ctenodaphnia) magna Straus reached the mass development that was favored by the minimum control from above and favorable trophic conditions. The total biomass of zooplankton in the lake and water transparency increased due to cladocerans. Nonuniform distribution of D.(C.) magna was caused by density of fish for which it was a preferable food object.

Keywords: high-mountainous lake, water level, zooplankton, abundance, biomass, density of fishes.

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V.I. Lazareva, V.N. Stolbunova, N.M. Mineeva, S.M. Zhdanova

Features of the Structure and Spatial Distribution of Plankton in the Sheksnа Reservoir.

Institute for Biology of Inland Waters RAS, 152742 Borok, Russia

e-mail: laz@ibiw.yaroslavl.ru

Based on the field studies conducted in August 2005 and 2007 the distribution of zooplankton structure and abundance as well as chlorophyll content in Sheksna reservoir were analyzed. A total of 107 species were found in zooplankton, i.e. 46 – Cladocera, 18 – Copepoda and 43 – Rotifera, and 24 species (10 Cladocera, two Copepoda, 12 Rotifera) new for the reservoir. In the surface layer of water where blue-green algae are concentrated, zooplankton abundance and biomass is 1.5–5 times lower and zooplankton structure is more simple than in deeper layer. The highest zooplankton biomass (>3 g/m3) was observed in the Lake Beloye and upper area of Sheksna part, while in the near–shore sites it did not exceed 1 g/m3. There were no significant changes in zooplankton abundance as compared to the abundance recorded at the end of the past century.

Keywords: reservoir, chlorophyll, zooplankton, new species, structure, abundance, environmental factors.

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A.N. Zinovieva

The Latitude-zonal Distribution of Aquatic and Semiaquatic Bugs (Heteroptera: Nepomorpha, Gerromorpha) in the North-East of European Russia.

Institute of Biology Komi Scientific Center UBRaS, 167982 Syktyvkar, ul. Kommunisticheskaya, 28

e-mail: aurika_z@mail.ru

The data on aquatic bugs (Heteroptera: Nepomorpha, Gerromorpha) in the North-East of European Russia based on author's and published data are given. 34 water and semiaquatic bugs species, which belong to 16 genera, 8 families and 2 infraorders are registered. The species distribution in freshwater reservoirs of Russian plain, Northern, Sub-Polar, Polar Ural taiga and tundra zones is studied. Nepomorpha and Gerromorpha specific diversity is changing northwards: in taiga zone 33 and in tundra zone 8 species were registered. Analyzed arealogical structure shows, that the base of regional fauna consists of Euro-Siberian (29%) and Transeurasia (26%) species. Latitudially, the temperate group is presented richly (64%). Aquatic and semiaquatic bugs fauna in the North-East of European Russia in its specific composition is most similar to alike tundra and taiga zones of the Western Siberia.

Keywords: aquatic bugs, hydrometrids, distribution, European North-East of Russia.

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Yu.V. Gerasimov, O.L. Vasyura

Growth and Feeding of Young Sterlet Sturgeon Acipenser ruthenus L. (Acipenseridae) in Pond at Different Duration of Their Preliminary Keeping in Basins.

Institute for Biology of Inland Waters RAS, 152742 Borok, Russia

e-mail: gu@ibiw.yaroslavl.ru

It is shown that the level of information richness of the environment where the fish are readed at the early stages of ontogenesis is one of the key-factors facilitating the development of the most important adaptive behavior patterns. Fish kept in the plastic tanks for a long period had minimum indices of stomach fullness, absence of weight and linear growth as well as the ration differed strongly from the natural one. Epibenthos organisms which are found when fish use tactile and gustatory receptors prevailed in the ration, while ratio of the infauna invertebrates which are found using olfactory sensors and electroreception was minimum. It is shown that prolonged development of fish in conditions of sensory deprivation leads to fixation of inadequate behavioral traits which complicates the process of conditionally-reflective switching when such fish enter the natural environment.

Keywords: artificial reproduction, sterlet, fish farming, pond culture, release terms, growth, feeding.

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A.V. Shershneva*, А.Е. Zhokhov**

Parasites of Stone Loach Barbatula barbatula (L., 1758) (Balitoridae) in Tributaries of the Volga River.

*Demidov P.G. University State of Yaroslavl, 150000 Yaroslavl, ul. Sovetskaya, 14, Russia


**Institute for Biology of Inland Waters RAS, 152742 Borok, Russia

e-mail: zhokhov@ibiw.yaroslavl.ru

During four 4 years, a total of 189 Barbatula barbatula, were examined for parasites from eight rivers in Yaroslavl oblast. An total of 41 parasite species were recorded in stone loach. The following parasite taxa were found found: parasitic Protozoa – (Kinetoplastidea – 2, Myxozoa – 6, Ciliophora – 7), parasitic Metazoa – (Monogenea – 5, Trematoda – 9, Nematoda – 4, Acanthocephala – 3, Bivalvia – 1). Stone loach was recorded for the first time as a new host for 7 parasite species: Chloromyxum truttae, Gyrodactylus cobitis, Paracaryophylaeus gotoi, Neogryporhynchus cheilancristrotus, Paracoenogonimus ovatus, Camallanus truncatus, Neoechinorhynchus crassus. The most abundant groups of parasites were Raphidascaris acus (28.6–100%, 1–64), Crepidostomum oschmarini (18.2–71.4%, 1–40), P. ovatus (3.13–71.4% 1–34) and G. nemachili (3.85–100%, 1–65).

Keywords: Barbatula barbatula, Balitoridae, stone loach, fish parasites, Protozoa, Metazoa, Volga River.

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V.I. Martemyanov

Estimation of the Physiological State of Roach Rutilus rutilus L. in Natural Conditions by Water Content in Organism.

Institute for Biology of Inland Waters RAS, 152742 Borok, Russia

e-mail: martem@ibiw.yaroslavl.ru

It is shown, that under natural conditions the roach have two levels of water content in organism during the annual cycle which reflect different physiological states of fish. During the feeding period the water content in the organism is maintained at a low level, 72.6 ± 0.05%. It conditions the physiological state related to the growth of fishes. In winter, spring and postspawning periods the water content in organism of roach is high, 75 ± 0.06%, that reflects the physiological state of survival during the periods of the year unfavorable for growth. The water content in the organism of fish is a convenient integrated parameter for assessment of the general physiological state of fish in natural conditions.

Keywords: roach, physiological state, growth, content of water.

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V.K. Shitikov, E.V. Abrosimova

Method of Allocation of Biotopes Borders in Watercorses Channels Using the Species Diversity Indexes of Benthic Community.

Institute of Ecology of the Volga River Basin of the Russian Academy of Science, 445003 Togliatty, ul. Komzina, 10, Russia

e-mail: stok1946@gmail.com

The results of the SHE-analysis based on the complex comparison of three cumulative curves: species richness, Shannon's diversity index and evenness index are discussed. By the example of the middle flat river Sok (a tributary of the Saratov Reservoir) and the data of hydrobiological survey of macrozoobenthos the applicability of the method for the allocation of "homogeneous" parts of watercourses on the borders of which sufficient in the species structure of cenoses take place.

Keywords: species diversity, the SHE-analysis, watersteam zoning.

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D.F. Pavlov

A Simple Diluter for Flow-Through Toxicity Studies.

Institute for Biology of Inland Waters RAS, 152742 Borok, Russia

e-mail: pavlov@ibiw.yaroslavl.ru

An original, simple and inexpensive diluter for flow-through toxicity studies is described. The diluter is run only by water gravity and has no moving parts. The main units of the device are made of very cheap disposable components and may be mounted without qualified technical assistance. It has neither metal nor other chemically-active parts contacting with experimental media. The diluter may be easily modified to study toxicants independently or in mixtures, in fact as many toxicants as are necessary. If properly calibrated it does not require further adjustments even during long-term experiments. The present system combines some principal ideas used in diluters invented by other authors. As the main original feature of the diluter described here is its dosing system based on the vacuum air lock. This key system is very simple, reliable, includes neither mechanical nor electrical devices and provides adequate accuracy in dosing.

Keywords: aquatic organisms, diluter, flow-through toxicity testing.

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