Begell House Inc.
Hydrobiological Journal
HYD
0018-8166
38
5
2002
Involvement of Some Components of Epiphyton in Organic Matter Decomposition
15
10.1615/HydrobJ.v38.i5.10
V. I.
Maltsev
State Administration of Ecology and Natural Resources in the Carpathians Uzhgorod, Ukraine National Agrarian University, Kiev, Ukraine
A. A.
Koval'chuk
Uzhgorod National University Uzhgorod, Ukraine
As a result of experiments it has been established that about 50% of organic matter was mineralized by bacteria and algae. The role of Chironomidae larvae was also rather high. They were followed by Hirudinea and mollusks. The involvement of microinvertebrates and Protozoa in organic matter decomposition was insignificant. The contribution of each group to the process of organic matter decomposition was about 1%.
Involvement of Planktonic Ciliata in the Process of Transformation of Suspended Organic Matter in Lake Kostomoyarvi (Kareliya)
8
10.1615/HydrobJ.v38.i5.20
T. V.
Khiebovich
Zoological Institute Russian Academy of Sciences, St.-Petersburg, Russia
Based on the experiments carried out, it is possible to conclude that the formation of fresh detritus in the closed cylinders was responsible for a sharp increase in the biomass of Ciliata. In this case, their ration increased from 10 to 50% of the total concentration of suspended organic matter, whereas organic matter decomposition increased from 5 to 70-80% of BOD1. Thus, in decomposing the detritus complex Ciliata are of considerable importance in the involvement of the newly formed sediments into the ecosystem.
Zooplankton of an Oligotrophic Lake at Early Stages of Anthropic Eutrophication
7
10.1615/HydrobJ.v38.i5.30
A. G.
Rogozin
Ilmen State Reserve Urals Branch of the Russian Academy of Sciences Miass (Chelyabinsk region) Russia
In studies of zooplankton of oligotrophic Lake Turgoyak subjected to intensive anthropic load, it has been found that both oligotrophic and typical eutrophic features are characteristic of this water body. A similar statement is true of other hydrobiological parameters. From this follows the conclusion that a mosaic pattern of indicator values is registered at early stages of rapid eutrophication. Thus, an integrated approach is required to reveal early stages of eutrophication.
Benthos of Two "Salmon Rivers", the Tributaries of the Northern Dvina
13
10.1615/HydrobJ.v38.i5.40
V. N.
Shubina
Institute of Biology Komi Research Center, Ural Division of the Russian Academy of Sciences, Syktyvkar, Russia
Yu. P.
Shubin
Institute of Biology Komi Research Center, Ural Division of the Russian Academy of Sciences, Syktyvkar, Russia
L. Ye.
Stakhieva
Institute of Biology Komi Research Center, Ural Division of the Russian Academy of Sciences, Syktyvkar, Russia
Ye. V.
Feofilova
Institute of Biology Komi Research Center, Ural Division of the Russian Academy of Sciences, Syktyvkar, Russia
Benthos of two rivers in the eastern part of the Northern Dvina basin is discussed from the point of view of its taxonomic peculiarities and ecological conditions in those rivers. Attention is given to the significance of river benthos as a source of natural fish food.
Effects of the Seining Selectivity on the Productive Properties of Fish Populations in Dnieper Reservoirs
11
10.1615/HydrobJ.v38.i5.50
I. Ye.
Dyachuk
Institute of Hydrobiology National Academy of Sciences of Ukraine Institute of Fish Economy Ukrainian Academy of Agricultural Sciences, Kiev, Ukraine
V. P.
Bil'ko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
S. V.
Kruzhilina
Institute of Fishery, Ukrainian Academy of Agrarian Sciences, Kyiv, Ukraine
It is suggested based on the long-term comparative data that net fishing was an important cause of retarded growth of bream and pikeperch in the Dnieper reservoirs as it is accompanied by a kind of selection leading to a decrease in the productive potential offish populations.
Properties of Low-Molecular Thermostable Proteins and Content of Thiols in Hepatopancreas of Carp under the Action of Sublethal Concentrations of Lead and Manganese Ions
8
10.1615/HydrobJ.v38.i5.60
O. B.
Stoliar
Ternopil Teachers Training Institute
Ternopil, Ukraine
V. Z.
Kurant
Ternopil Volodymyr Hnatiuk National Teachers-Training University
Ternopil, Ukraine
V. A.
Khomenchuk
Ternopil National Pedagogic University, Ternopil, Ukraine
It was stated that in hepatopancreas of Cyprinus carpio L. maintained for 14 days in the environment with 0.2 mg/L lead and 2.4 mg/L manganese the lead is mainly bound with high-molecular proteins, decreasing the content of SH-groups. Manganese ions bind chiefly with low-molecular compounds, metallothioneins in particular.
Role of Toxic Pollution in the Formation of Neoplasms in Fishes
17
10.1615/HydrobJ.v38.i5.70
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.
Bazeyva
Institute of Zoology National Academy of Sciences of Ukraine Kiev, Ukraine
In the survey presented, the important role of polluting the hydrosphere with chemical compounds as carcinogens for fishes is elucidated. A substantial role in the forming neoplasia has a type (class) of a provoking aqueous carcinogen, as well as genetic code of the fish. It is noticeable that the hepatic an epidermal neoplasias have become widely distributed in both fresh-water and marine fishes in the last 20 years. Attention is drawn to the need for a complex approach to that problem.
The Role of Humic Substances in the Processes of Complexation and Detoxication (by the Example of the Dnieper Reservoirs)
16
10.1615/HydrobJ.v38.i5.80
T. A.
Vasilchuk
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
It is shown that humic substances are the main part of organic dissolved matter in the natural waters. Seasonal dynamics and molecular weight distribution of these compounds have been studied. The role of humic and fulvic acids in the complexation with heavy metals and detoxication processes are established.
A Dependence of the Numbers of Fish Young and Resources in the Dnieper and the Southern Bug Mouth Region on the Mode of Water Releases through the Kakhovka Hydraulic Scheme
10
10.1615/HydrobJ.v38.i5.90
V. N.
Zhukinskiy
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
V. P.
Bil'ko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
B. I.
Pravotorov
Institute of Hydrobiology National Academy of Sciences of Ukraine, Kiev, Ukraine
By comparing long-term data, the necessity is demonstrated for regulating values of water releases from the upstream reservoir in order to maintain fish productivity in the water bodies of the Dnieper's floodplain on a high level.
Bioassay of the Toxic Action of the Triman-1 Regulator of Plant Growth on Crustacea
8
10.1615/HydrobJ.v38.i5.100
N. A.
Platonov
Institute of Hydrobiology National Academy of Sciences of Ukraine, Kiev, Ukraine
The influence of the triman-1 regulator of plant growth on Daphnia magna and Ceriodaphnia affinis was studied in performing acute and chronic experiments. It has been found that the LC5096 of the preparation for Daphnia magna and Ceriodaphnia affinis accounts for 41.0 and 40.4 mg/L, respectively. In acute experiments, the concentrations of the preparation of 50 and 75 mg/L proved to be lethal for Ceriodaphnia affinis. In chronic experiments, the lethal concentration of the preparation accounted for 25 mg/L. In this case, fecundity of the studied species of Crustacea decreased by 82.4%. The concentration of the preparation in the range between 0.001 and 0.1 mg/L had little or no effect on Ceriodaphnia affinis.
Macrophytes of the Exclusion Zone of the Chernobyl Nuclear Power Station: the Formation of Plant Communities and Peculiarities of Radioactive Contamination of the Left-Bank Floodplain of the Pripyat River
17
10.1615/HydrobJ.v38.i5.110
D. I.
Gudkov
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kyiv, Ukraine
L. M.
Zub
Institute of Evolution Ecology National Academy of Sciences of Ukraine Kiev, Ukraine
A. L.
Savitskiy
Institute of Hydrobiology National Academy of Sciences of Ukraine, Institute of Ecology, National Ecological Center of Ukraine, Institute of Botany National Academy of Sciences of Ukraine Kiev, Ukraine
The construction of a complex of flood protective dams on the left bank of the floodplain of the Pripyat river was responsible for changes in the hydrological regime of its water bodies, and also in the character of thickets of higher aquatic plants.
Results of the study of the content of 90Sr and 137Cs in higher aquatic plants made it possible to reveal the peculiarities of accumulation of radionuclides by various species of macrophytes, and also to distinguish those species of macrophytes which can be used as indicators of radioactive contamination. The peculiarities of accumulation of radionuclides by various species of higher aquatic plants can essentially influence their contribution to the total content of radionuclides.
Age Peculiarities of the Accumulation of 137Cs by Freshwater Bivalvia in the Cooling Pond of the Chernobyl NPS and in the Pripyat River
8
10.1615/HydrobJ.v38.i5.120
The age peculiarities of the accumulation of 137Cs in soft tissues of Bivalvia belonging to various dimensional groups registered in water bodies of the exclusion zone of the Chernobyl NPS, including the cooling pond of the Chernobyl NPS and the Pripyat river, were studied. It has been found that the content of 137Cs decreases in proportion to the increase in the linear dimensions of specimens. This relationship may be described by the equation A = aL-1.54±0.20. It is believed that the distinctions in the ration of mollusks, and also various intensities of the processes of metabolism in specimens differing in their dimensions, are responsible for this phenomenon.