Begell House Inc.
Hydrobiological Journal
HYD
0018-8166
39
6
2003
Light and Dark Respiration of Phytoplankton of the Black Sea
8
10.1615/HydrobJ.v39.i6.10
L. V.
Stelmakh
A.O. Kovalevsky Institute of Marine Biological Researches,
2, Nakhimov Av., Sevastopol 299 011, Crimea
It has been shown that in the coastal waters of the Black Sea at the same temperature of water and illumination the light respiration of phytoplankton was closely similar to that registered in its open waters. The maximum values of light respiration (28–47% of the total production of phytoplankton) were registered in the samples with a predominance of Pyrrophyta and small forms of flagellate, whereas its minimum values (10–20%) – in the samples with a predominance of Bacillariophyta. At a high intensity of light, light respiration was 5 times higher than dark respiration, whereas at a low intensity of light it was 3 times higher than dark respiration. A decrease in the temperature of water by 10°C at the same illumination resulted in the decrease of light respiration by a factor of 2.4, and also in the decrease of dark respiration by a factor of 2.7. Regression relationship was established between the rate of light respiration and the biomass of Pyrrophyta and small forms of flagellate.
An Ecologically Justified Operating Mode of the Dniester Reservoir as a Factor of Preservation of the Ecosystem of the Dniester Delta
12
10.1615/HydrobJ.v39.i6.20
L. V.
Shevtsova
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine; Kyiv University of Management and Business
N. Ya.
Babich
State Committee for Water Management of Ukraine, Kiev, Ukraine
V. V.
Semchenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev; State Committee for Water Management of Ukraine, Kiev; Lake Hydrometeorological Station, Novodnestrovsk
Based of long-term observations, an ecologically justified operating mode of the Dniester reservoir is proposed. This procedure is aimed at preservation of ecosystems of the Dniester delta, their biodiversity and biological production. Spring ecological overflows (drawdowns) of water are subdivided into two groups: ecological-sanitary and reproductive. The procedure of these drawdowns is proposed.
Variability of the Linear Dimensions of the Giant Tropical Prawn, Macrobrachium Rosenbergii (De Man) (Crustacea, Palaemonidae), during he Juvenile Period
10
10.1615/HydrobJ.v39.i6.30
V. F.
Kulesh
Belarusian State Pedagogical University
Minsk, Belarus
A. V.
Alekhnovych
Research-Practical Center of the National Academy of Sciences of Belarus on Bioresources,
Minsk, Belarus
The variability of the linear dimensions of the giant tropical prawn, Macrobrachium rosenbergii (De Man), depending on the density of its populations during the juvenile period was studied. The variability of its linear dimensions was assessed in terms of the degree of dispersion. In some populations, the dispersion of the body length of the specimens of the same age remained unchanged, whereas the density of their populations varied over a wide range. Constant variability was registered only in cultivating the animals in groups, which is indicative of the availability of a special mechanism supporting their variability at the population level.
Influence of the Temperature and Oxygen Content on the Intensity of Aerobic Oxidation of Organic Matter in the Water of the Black Sea
6
10.1615/HydrobJ.v39.i6.40
N. V.
Kovaleva
Center of Monitoring of the Environment Odessa State University Odessa, Ukraine
V. I.
Medinets
Odesa National University
Odesa, Ukraine
Ye. I.
Gazetov
Center of Monitoring of the Environment Odessa State University Odessa, Ukraine
The rate of aerobic oxidation of organic matter in eutrophic marine waters was assessed on the basis of long-term investigations carried out in the Black Sea. Relationship was established between the rate of aerobic oxidation of organic matter and the temperature of water, and also between the rate of this process and the content of dissolved oxygen. The last mentioned relationship is described by the exponential function within specified temperature intervals.
Algae of the Russian Section of the Amur River Basin
16
10.1615/HydrobJ.v39.i6.50
L. A.
Medvedeva
Institute of Biology and Soil, Far East Department, Russian Academy of Sciences, Vladivostok, Russia
S. Ye.
Sirotskiy
Institute of Aquatic and Ecological Problems Far East Department of the Russian Academy of Sciences Khabarovsk, Russia
Literature data concerning various aspects of the study of algae of the Amur river basin within the territory of Russia have been generalized. They include 118 references.
Bacterioplankton of the Kanev Reservoir and its Productional Characteristics
15
10.1615/HydrobJ.v39.i6.60
T. V.
Golovko
Institute of Hydrobiology, National Academy of Sciences of Ukraine Kiev, Ukraine
V. M.
Yakushyn
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
N. I.
Tronko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
The structure of bacterioplankton of the upper reaches of the Kanev reservoir, and also its productional, trophic, and dynamic characteristics, were studied. It has been found that in various seasons and years, and also in different sections of the reservoir, the numbers of bacterioplankton, its productional characteristics, and also the rate of its consumption, varied over a wide range. It has been shown that in the upper reaches of the reservoir the functioning of bacterioplankton in the impulse-stabilized state is conditioned by its successions.
Comparative characteristics of the functional state of liver in carps cultivated in heated water and ponds
9
10.1615/HydrobJ.v39.i6.70
N. B.
Yesipova
Dnipropetrovs’k National University, Dnipropetrovs’k, National Agricultural University, Kiev, Ukraine
N. Yu.
Yevtushenko
National University of Life and Environmental Sciences of Ukraine, Kiev, Ukraine
The contents of glycogen, fat and proteins in liver of carps cultivated in heated water differed noticeable from corresponding values in carps cultivated in ponds without heating. Thus, it was found that glycogen stores reduced, fat accumulated, and protein metabolism was impaired in liver of fish which grew during summer in floating net pens (FNP). These changes were reflected negatively in functional activity of liver and growth of "warm-water" fishes.
A Study of Sensitivity of Ceriodaphnia affinis Lilljeborg to Tap Water of the City of Kiev
8
10.1615/HydrobJ.v39.i6.80
V. I.
Rakov
Center of Ecological Monitoring of Ukraine, Kyiv; Main State Ecological Inspectorate in the Ministry for Environmental Protection of Ukraine, Kyiv, Ukraine
M.
Hoffmann
Center of Ecological Monitoring of Ukraine, Kyiv; Main State Ecological Inspectorate in the Ministry for Environmental Protection of Ukraine, Kyiv, Ukraine
The reliability of toxicity tests with the use of Ceriodaphnia affinis Lilljeborg as test objects can be significantly reduced or eliminated because of the use of tap water for blanks and dilution, as it is recommended by the relevant Ukrainian regulatory document. In order to get at least a rough idea about the causes of toxicity, tap water was treated physically and chemically to exclude various groups of toxicants. The results show that low-molecular organic compounds rather than inorganic ones cause the difficulties at determination of harmfulness of drinking tap water. Further gas- chromatographic analyses should be carried out to specify those compounds, but it is already obvious that the Ukrainian regulatory document should be changed in this point.
Characterization of Low-Molecular Sulfur-Containing Compounds from Carp Hepatopancreas in Copper and Zinc Intoxication
7
10.1615/HydrobJ.v39.i6.90
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
There were studied the effects of 14-day exposure of common carps to the water containing 0.2 mg/L Cu and 2 mg/L Zn on the composition of thermostable proteins and thiols in hepatopancreas of those fishes. It was found that copper is mainly distributed between non-protein components and the heavy fraction of thermostable proteins (TP). The content of zinc in TP was not changed under the conditions of the experiment.
Freshwater Bivalvia as Sedimentators of Radioactive Suspended Matter in the Cooling Pond of the Chernobyl NPS
8
10.1615/HydrobJ.v39.i6.100
The fauna of Bivalvia of the cooling pond of the Chernobyl NPS was investigated. The storage of mollusks, and also the storage of 137Cs and 90Sr accumulated by these animals, was determined. The capacity of mollusks for accumulation and filtration is of considerable importance in the processes of accumulation of radionuclides in bottom sediments. The process of redistribution of radionuclides in bottom sediments is discussed.
Peculiarities of Ammonium Nitrogen Assimilation in Green and Blue-Green Algae
7
10.1615/HydrobJ.v39.i6.110
G. B.
Gumenyuk
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev; Ukraine Ternopil State Pedagogical University, Ternopil, Ukraine
It was found that representatives of Chlorophyta, as distinct from Cyanophyta, are peculiar in having a highly effective pathway involved in detoxification of ammonia. Specific peculiarities as to ammonium nitrogen transformation are the basis of one of the mechanisms regulating ecological successions of species in freshwater algal communities.
Flows of Biogenic Elements from Bottom Deposits into Water and Their Role in Forming the Trophic Status of Three Lakes of Belarus
9
10.1615/HydrobJ.v39.i6.120
The long-term data on the external and internal biogenic loadings and factors determining the turnovers of phosphorus and nitrogen in one mesotrophic and two eutrophic lakes of Belarus are analyzed.
Contents for 2003
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10.1615/HydrobJ.v39.i6.130