Begell House Inc.
Hydrobiological Journal
HYD
0018-8166
43
3
2007
Zooplankton of the Pelagic Zone of the Kanev Reservoir and the Peculiarities of its Spatial and Temporal Distribution
3-21
10.1615/HydrobJ.v43.i3.10
O. V.
Pashkova
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
Results of comprehensive studies on zooplankton of the pelagic zone of the Kanev reservoir, including its biodiversity, sources of influx, horizontal distribution, and long-term dynamics, are presented. It has been found that the waters of the Kiev reservoir are the main source of the influx of zooplankton into the Kanev reservoir. For the most part, the maximum quantitative indices of the development of this community were observed in the upper section of the studied reservoir. It was concluded that inter-annual fluctuations in the development of zooplankton registered at the present time are indicative of its normal functioning.
Assessment of the State of a Small River under Conditions of Intensive Economic Activities and the Ways of Its Improvement
22-35
10.1615/HydrobJ.v43.i3.20
A. Ye.
Usov
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
T. N.
Sereda
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
L. V.
Guleykova
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
S. A.
Afanasyev
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
Results of the study of the hydrochemical and hydrobiological regime of the Strizhen river (the right bank tributary of the Desna river) carried out in 2000-2004 are presented. The state of various components of the river ecosystem was assessed. Recommendations aimed at prevention of crisis situations in the basin of the river were elaborated.
Higher Aquatic Vegetation of Water Bodies of the Town of Kiev
36-56
10.1615/HydrobJ.v43.i3.30
I. Yu.
Ivanova
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
G. V.
Kharchenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
The species composition of higher aquatic plants and the structure of their communities were studied in 13 water bodies of the town of Kiev, including the lakes Almaznoye, Verbnoye, Vyrlitsa, Goluboye, Lugovoye (Opechen-5), Pidbirna, Raduzhnoye, Redkino, Sineye, Solnechnoye, Telbin, Tsentralnoye, and Orekhovatskiy pond N 2. Investigations were carried out in 2005.
Changes in the Species Structure of Fish Population of Sapropelic Lake Nero
57-70
10.1615/HydrobJ.v43.i3.40
S. N.
Polovkova
Institute of Biology of Inland Waters of Russian Academy of Sciences, Borok, Russia
V. G.
Tereshchenko
Institute of Biology of Inland Waters of Russian Academy of Sciences, Borok, Russia
L. I.
Tereshchenko
Institute of Biology of Inland Waters of Russian Academy of Sciences, Borok, Russia
S. N.
Nadirov
Institute of Biology of Inland Waters of Russian Academy of Sciences, Borok, Russia
Analysis of changes in the structure of fish catches in sapropelic Lake Nero has shown the lake succession from the bream and zander type through the bream and bleak to the bream and bleakless type of water body that took place during the last three centuries because of depth decrease and overgrowing rate increase. It has been shown that the complex of anthropogenic factors had changed the natural succession course for the last 40 years and substantially influenced structural transformation of the fish population. The results of the study allowed conclusion that the structure of fish population of sapropelic Lake Nero and its fish capacity are determined not only by the abiotic lake properties, but also by migrants, which came from the Volga River (the Gor'kovskoye Reservoir).
Effects of Salinity Fluctuations on Growth and Development of the Larvae of Marsh Frog (Rana ridibunda L)
71-79
10.1615/HydrobJ.v43.i3.50
V. A.
Kuznetsov
Mordovian State University, Saransk, Russian Federation
Ye. A.
Lobachyov
Mordovian State University, Saransk, Russia
It has been established that low water salinity (up to 2−3o/oo) has a favorable effect on growth and development of the larvae of Rana ridibunda L. The alternate keeping of larvae in fresh water and water with a low salinity results in even more accelerated growth and development. As a whole, under salinity conditions changed during 24 h (at salinity fluctuations), the duration of larval development of marsh frog is reduced by 10% as compared to constant optimal conditions. In addition, the mortality diminishes and physiological state of animals improves under changing salinity conditions.
Estimation of Toxicity of Glyphosate-Based Herbicides by Biotesting Method Using Cladocera
80-91
10.1615/HydrobJ.v43.i3.60
S. D.
Mel'nichuk
National Agricultural University of Ukraine, Kiev, Ukraine
V. I.
Lokhanskaya
National University of Bioresources and Nature Management, Kyiv, Ukraine
Toxicity of herbicides Fakel, Glyphos, Roundup, Sangle, Corphosate, VulkanVulkan (all based on the 48% isopropilamine salt of glyphosate as the active ingredient) was investigated in acute experiments. It has been shown that LC50 (120 hours) of the herbicides listed above, except Vulkan, for D. magna are within the range of 1.75−6.75 mg/dm3, and LC100 (120 hours) for C affinis was 2.13−5.25 mg/dm3. The 120-hour LC50 of Vulkan for D. magna and were 82.5 mg/dm3 and 49.91 mg/dm3, respectively.
Assessment of Transformation of the Chemical Composition of Waters of Some Rivers of the Dnieper River Basin
92-107
10.1615/HydrobJ.v43.i3.70
R. V.
Rudenko
Kiev State University, Kiev, Ukraine
Results of the study of the chemical composition of waters of some tributaries of the Dnieper river are presented. Changes in the chemical composition of waters of the studied rivers were analyzed. The quality of the river waters was assessed in terms of their salt composition.
A Study of Stability of Oxygen Conditions in Aquatic Ecosystems by Methods of Mathematical and Simulation Modeling
108-114
10.1615/HydrobJ.v43.i3.80
V. I.
Lavryk
Kyiv-Mogyla National University Kyiv, Ukraine
I. A.
Skuratovskaya
The National University “Kyiv-Mohyla Academy” Kiev, Ukraine
Dynamics and stability of the oxygen conditions under different conditions of functioning of aquatic ecosystems were investigated by methods of mathematical and simulation modeling. It has been shown how the character of oxygen conditions varies depending on the change in some biotic parameters and intensity of eutrophication.