Begell House Inc.
Hydrobiological Journal
HYD
0018-8166
38
4
2002
On the Hydrobiological Regime of the Lena River Delta
8
10.1615/HydrobJ.v38.i4.10
A. I.
Tsybulskiy
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
A. Yu.
Gukov
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
The hydrobiological regime of the Lena river delta was studied. The species composition of phytoplankton, zooplankton, and zoobenthos was investigated. It has been found that the biomass of zoobenthos in the upper reaches of the Lena river canals was ten times lower than that registered in their lower reaches. Four complexes of species were distinguished. They were as follows: species occurring in the main riverbed of the Lena river, species found in its eastern canals, species registered in lakes, and species occurring in the northwestern canals of the Lena river delta. The number of species of hydrobionts increased in a westward direction.
Zooplankton of a Small River Transformed into the Canal (on the Example of the Lybed River)
9
10.1615/HydrobJ.v38.i4.20
Yu. F.
Gromova
Institute of Hydrobiology, National Academy of Sciences of Ukraine Kyiv, 04210, Ukraine
The peculiarities of the structural organization of zooplankton of a small urban river transformed into the canal were studied on the example of the Lybed river. It has been found that the composition and dynamics of structural indices of zooplankton in the riverbed depend mainly on the influx of allochthonous plankton.
Biological Effects of the Combined Chronic Action of 90Sr and Pb2+ on Daphnia Magna Straus
11
10.1615/HydrobJ.v38.i4.30
M. G.
Mardarevich
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
D. I.
Gudkov
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kyiv, Ukraine
L. S.
Kipnis
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
V. V.
Beliayev
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev
The chronic action of lead ions (0.01 and 0.1 mg/L) and 90Sr (20, 2·103 and 2·105 Bq/L) on the main biological characteristics of Daphnia magna Straus was studied under conditions of the two-factor experiment. The valid toxic influence was registered at all the studied concentrations. A positive modifying effect of the radionuclide in relation to the toxic influence of lead ions was observed under the combined action of radioactive (90Sr 20, 2·103 Bq/L) and chemical contamination.
Radioactive Silver in Freshwater Ecosystems of Ukraine after the Accident at the Chernobyl Nuclear Power Station
8
10.1615/HydrobJ.v38.i4.40
After the accident at the Chernobyl Nuclear Power Station, 110mAg was found mainly in digestive and reproductive organs of fishes, including planktophagous (Hypophthalmichthys molitrix (Val.) and benthophagous (only in 1986-1990) species. The highest content of 110mAg was registered in planktophagous species of fishes occurring in the cooling pond of the Chernobyl Nuclear Power Station. For the most part it was observed in their eggs and liver. In predatory species of fishes. 110mAg was not found. The sole exception was Aspius aspius L.
Radionuclides in Some Components of Ecosystems of the Upper Reaches of the Zaporozhye Reservoir and in its Floodplain Water Bodies
9
10.1615/HydrobJ.v38.i4.50
P. A.
Nekrasov
Dnepropetrovsk State University, Dnepropetrovsk, Ukraine
L. V.
Bondarenko
Dnepropetrovsk State University, Dnepropetrovsk, Ukraine
The values of specific activity of natural radionuclides, including 40K, 232Th, and 226Ra, and also of the artificial 137Cs, were determined in some components of aquatic ecosystems of the upper reaches of the Zaporozhye reservoir and in its floodplain water bodies. Relationship was established between the specific activity of these radionuclides and the character of bottom sediments and hydrological conditions. The radioecological situation in the studied water bodies was non-uniform and unstable.
Fish Tumors of Viral Origin: An Overview
17
10.1615/HydrobJ.v38.i4.60
O. N.
Davydov
I. I. Schmalhausen Institute of Zoology, National Academy of Sciences of Ukraine, Kiev, Ukraine
N. M.
Isayeva
Institute of Zoology, National Academy of Sciences of Ukraine, Kiev, Ukraine
L. Ya.
Kurovskaya
Institute of Zoology National Academy of Sciences of Ukraine Kyiv, Ukraine
R. Ye.
Bazeev
Institute of Zoology National Academy of Sciences of Ukraine Kiev, Ukraine
The body of information submitted in this review is based on the data published during the past two decades. There are presented clinical manifestations, pathomorphology, pathogenesis, and circumstances promoting the prevalence of neoplasms among fishes. Along with these issues, the attention is focused on the viruses as the etiological carcinogenic factor. The significance of the subject matter of the present overview emphasizes the necessity of extending oncologic researches in ichthyopathology.
Microsporidia of Branchiopods from the Northern Regions of Ukraine
12
10.1615/HydrobJ.v38.i4.70
O. V.
Polkovenko
T. Shevchenko Kiev University Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
N. A.
Ovcharenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
L. V.
Shostak
T. Shevchenko Kiev University Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
P. Ya.
Kiloczyckij
T. Shevchenko Kiev University Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
Four species of Microsporidia parasitizing Branchiopod hosts are described based on the light and ultrastructural data. Microsporidium sp. from the body cavity of Lepidurus apus, produced ovoid spores 3.5±0.4ґ2.2±0.3 mm in size. Mononuclear (asymmetrical spores of Larssonia hiberna sp. n., measured 3.8±0.1x2.0±0.2 mm, were found in fat tissues and hemocoel of Daphnia magna. Filamentous episporal surfacing inverted polaroplast and 8-9 coiled isofilar polar filament are characteristic features of this species. Berwaldia singularis Larsson and Microsporidium stagnalis sp. n. from D. pulex are presented. Ellipsoidal spores of M. stagnalis, 4.8±0.4ґ2.4±0.3 mm in sizes, formed a two-layered exospore, tripartite lamellar and tubular polaroplast, and the isofilar polar filament coiled in a two-layer spiral of 14 rings.
An Optimized Method for Total Counting of Benthic Bacteria
8
10.1615/HydrobJ.v38.i4.80
A. N.
Butorin
Institute of Biology of Inland Waters Russian Academy of Sciences Borok, Russia
A. Yu.
Gorbneko
Institute of Biology of Inland Waters Russian Academy of Sciences Borok, Russia
A. I.
Kuznetsova
Institute of Biology of Inland Waters Russian Academy of Sciences Borok, Russia
A. N.
Dzyuban
Institute of Biology of Inland Waters, Russian Academy of Sciences, Borok, Russia
It is shown that numbers of benthic bacteria (BB) can be determined with a higher accuracy due to the method described. The procedure proposed by the authors consisted in the preceding inhibiting the ground consumers of BB with subsequent repeated catch and removal of microorganisms from the partitioned ground specimens. A more appropriative microscopic dye was also chosen, and the mathematical model interpreting the changes in quantities of the 'caught' BB was applied. Other methods employed in similar studies allow detecting only about 50% of the total number of BB.
Effects of the Black Sea on Water Salinity in the Dnepr Mouth Area
10
10.1615/HydrobJ.v38.i4.90
L. A.
Zhuravleva
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
In the work presented by the author, who profoundly studied the Dnepr-Southern Bug estuarine area, the processes forming its contemporary state are under analysis. The unfavorable hydrological and hydrochemical conditions in the area considered (which formerly was abundant in natural resources) are mainly the consequences of limited discharges out of the Dnepr cascade reservoirs, promoting thereby adverse effects of seawater intrusions.
Meiobenthos of the Profundal Hydrosulfuric Zone of the Black Sea
8
10.1615/HydrobJ.v38.i4.100
N. G.
Sergeyeva
Institute of Biology of Southern Seas National Academy of Science of Ukraine, Sevastopol, Ukraine
The organisms testified to the existence of a diverse meiobenthic fauna were revealed over the depth range 470-2250 m in the Black Sea that commonly believed to be lifeless. This fauna is represented by two complexes: the species typical for the Black Sea shelf and the unknown animals endemic to the abyssal hydrosulfuric f zone. Three representatives exemplified this deep-sea fauna are shortly described.
Toxicity of Copper for Hydrophytes: Accumulation, Effects on Photosynthesis, Respiration and Pigment System (A Review)
16
10.1615/HydrobJ.v38.i4.110
Ye. A.
Pasichna
Institute of Hydrobiology, National Academy of Sciences of Ukraine Kiev, Ukraine
The review embraces a basic information on the effects of copper on water plants, in particular the contemporary data on some mechanisms touching upon photosynthesis, respiration, and the pigment system. The review gives an idea of achievements and trends of researches in this field.
Experience of Mangrove Oyster Cultivation in the Tabounsu Estuary, the Republic of Guinea
11
10.1615/HydrobJ.v38.i4.120
V. K.
Machkevskiy
Institute of Biology of Southern Seas National Academy of Sciences of Ukraine Sevastopol
The biotechnology of continuous breeding of Crassostrea tulipa L. under conditions of a tropical mangrove estuary is reported. The phenomena, cultivation designs and maintenance regime, which greatly influence the successful growing life cycle, are considered. The results obtained owing to the technology proposed by the authors substantiate the possibility of its successive use in the region adjacent to Guinea.
Development of European Approaches to Biological Assessment of the State of Hydroecosystems and Their Application to the Monitoring of Ukrainian Rivers
19
10.1615/HydrobJ.v38.i4.130
A review of the modem approaches and methods for the assessment of hydrobiological state of running waters is given. Taking into account the complexity of factors influencing the well-being of such ecosystems, their integrated assessment has to be considered as most convincing.
Structural and Functional Characteristics of Communities of Phytophilous Invertebrates of the Kiliya Delta of the Danube River
15
10.1615/HydrobJ.v38.i4.140
A. A.
Etingova
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
Zoophytes, that is communities of macroinvertebrates associated with 13 species of higher aquatic plants, including submerged plants, half-submerged plants, and plants with floating leaves, was studied in spring and summer 1992, and also in spring 1997, in water bodies of the Kiliya delta of the Danube river.
The influence of the environmental factors, and also of the species of higher aquatic plants, on the distribution, quantitative indices, and production of zoophytes was assessed.
The species structure of invertebrates associated with macrophytes depended mainly on the mineralization of water, and also on the speed of water flow. The total numbers, biomass, and production of zoophytes were conditioned by the area of the surface of macrophytes.