Begell House Inc.
Hydrobiological Journal
HYD
0018-8166
38
6
2002
Energy Balance and Ecological Efficiency of Pelagic Communities in the Black Sea
8
10.1615/HydrobJ.v38.i6.10
A. N.
Grishin
Southern Scientific-Research Institute of Marine Fishery and Oceanography Kerch, Ukraine
Based on the analysis of the energy and matter streams at different trophic levels, it is stated that the gross production of phytoplankton became triple, and along with this the lowered efficiency of its utilization lowered at all trophic levels of the ecosystem of the Black Sea in 1992-1994 as compared to 1979. An increased formation of detritus is observed; however, a share of idle detritus in the pelagic zone has risen from 5 to 12% for the last twenty years. Net fish proportion dropped from 2.34·1012 kJ to 0.42·0112 kJ.
Seasonal Changes in Plankton of the Northwestern Part of the Japan Sea
10
10.1615/HydrobJ.v38.i6.20
V. V.
Nadtochiy
TINRO Vladivostok, Russia
Yu. I.
Zuyenko
TINRO Vladivostok, Russia
Totally, seven seasons, including winter, spring, early summer, summer, late summer, autumn, and late autumn, were distinguished in the annual cycle of the development of plankton by the methods of cluster analysis based on the data obtained in 1988-2000 in three zones belonging to various types of the vertical structure of waters in the northwestern part of the Japan Sea. The peculiarities of the composition of seston in each season, and also annual dynamics of the development of plankton depending on the rate of heating of the water body, were revealed.
Uptake of Inorganic Phosphorus by Microplankton in the Black Sea in Summertime
6
10.1615/HydrobJ.v38.i6.30
M. V.
Kirikova
Institute of Biology of the Southern Seas National Academy of Sciences of Ukraine Sevastopol, Ukraine
A. V.
Parkhomenko
Institute of Biology of the Southern Seas National Academy of Sciences of Ukraine Sevastopol, Ukraine
Data on the rate of the uptake of inorganic phosphorus by microplankton and its turnover time in the upper 50 m layer of water of the Black Sea registered in August-September 1990 are presented. A high rate of the uptake of phosphate (on the average 180·10-4 mM P·year-1) and a short time of their turnover (on the average 0.9 year) are characteristic of the upper 10-15 m layer of water characterized by a low content of phosphate. Their low content suggests that the process of regeneration is the main source of phosphorus taken up by microplankton in the surface layer of water of the Black Sea in summertime. It has been found that the difference in the rate of the uptake of phosphorus by microplankton in various sections of the sea is conditioned by their trophic level. The content of phytoplankton (in terms of chlorophyll a concentration) is the main factor responsible for the rate of phosphorus uptake in the deep-water section, and also in the northwestern part of the sea.
Planktonic Ciliata of the Upper Reaches of the Dnieper River
8
10.1615/HydrobJ.v38.i6.40
A. A.
Nebrat
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
The species composition and dynamics of the development of Ciliata of the upper reaches of the Dnieper river were investigated. It has been found that the sanitary state of the upper reaches of the Dnieper river determined in terms of the indicator species of Ciliata is satisfactory or good.
Long-term Changes in Macrozoobenthos of the Kiliya Delta of the Danube River
7
10.1615/HydrobJ.v38.i6.50
Z. G.
Meteletskaya
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
The current state of macrozoobenthos of the Ukrainian section of the lower reaches of the Danube river was compared with that registered in the mid-1950s. It has been found that anthropic load on the ecosystem of the Danube river resulted in simplification of some structural indices of macrozoobenthos.
New Data on the Expansion of the Area of Distribution of Brackishwater Invertebrates in the Dnieper Reservoirs
3
10.1615/HydrobJ.v38.i6.60
Yu. V.
Pligin
Institute of Hydrobiology, National Academy of Sciences of Ukraine Kiev, Ukraine
S. F.
Matchinskaya
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
The expansion of the area of distribution of invertebrates, including representatives of Polychaeta, Hirudinea, Mollusks, and Crustacea, was registered in the Dnieper reservoirs in 1990-2000. These species were not specially introduced into the reservoirs. It is likely that favorable abiotic conditions were responsible for the distribution of random species of brackishwater invertebrates in the Dnieper reservoirs.
Formation of the Microflora of the Tashlyk Cooling Pond of the Southern Ukrainian Nuclear Power Station
8
10.1615/HydrobJ.v38.i6.70
N. G.
Tkachuk
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
A. I.
Merezhko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
B. A.
Shimanskiy
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
It has been found that a high temperature of water, the microbiological and hydrochemical composition of sewage and river waters, and also the hydrological peculiarities of water bodies, were responsible for the formation of the microflora of the Tashlyk cooling pond.
Effects of Antiseptics on Developing Fish Spawn
13
10.1615/HydrobJ.v38.i6.80
L. Ya.
Kurovskaya
Institute of Zoology National Academy of Sciences of Ukraine Kyiv, Ukraine
There are shown the peculiarities of changes in the weight, protein content, amylase, proteinase, alkaline and acidic phosphatases activities in the course of development of trout and carp eggs treated by violet C, malachite green, and brilliant green used as antiseptics.
Sponges as Toxicological Bioassay Test Organisms
6
10.1615/HydrobJ.v38.i6.90
A. E.
Balayan
Biology Research Institute at Irkutsk State University Irkutsk, Russia
D. I.
Stom
Scientific-Research Institute of Biology Irkutsk State University Irkutsk, Russia
The peculiarities of tissual and organismal responses in Baikal sponges to some dyes are shown to be quite demonstrative as the signs of toxic environmental effects. Taking into account the sensitivity and simplicity of the coloration techniques tested, these techniques need a further development for their employment in toxicological bioassays.
Regulation of Oxygen Content in Waters of the Kanev Reservoir in Wintertime
6
10.1615/HydrobJ.v38.i6.100
L. V.
Petrenko
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
O. V.
Timchenko
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
The method for determining the flowrate of the Kiev Hydro-Electric Power Station necessary to the arrival of an additional amount of oxygen at the expense of atmospheric aeration at the near-dam polynia of the river section of the Kanev reservoir in wintertime has been elaborated.
Application of Simulation Mathematical Modeling to the Problems of Management of Eutrophication Processes in Lakes and Reservoirs
10
10.1615/HydrobJ.v38.i6.110
V. I.
Lavryk
Kyiv-Mogyla National University Kyiv, Ukraine
V. A.
Dobrynskiy
Institute of Hydrobiology of National Academy of Sciences of Ukraine, Kyiv, Ukraine
I. V.
Rogal
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
Methodological questions and management problems of eutrophication processes in lakes and reservoirs are considered. The ways to implement practically the theoretical recommendations proposed are illustrated by the example of the phosphorus cycle.
The Nature and Patterns of the 'Melosira Years' Phenomenon in Lake Baikal
11
10.1615/HydrobJ.v38.i6.120
V. K.
Yevstaf'yev
Limnological Institute Siberian Department of the Russian Academy of Sciences Irkutsk, Russia
N. A.
Bondarenko
Limnological Institute of Siberian Branch of Russian Academy of Sciences,
P.O. Box 4199, Irkutsk 664033, Russia
The mathematical analysis of the data for 1943-1999 revealed that the outburst s of phytoplankton productivity (PP), especially that of Melosira, observed in the southern part of Baikal are of resonance pattern. Dynamics of these bursts is obeyed the solar activity cycles of 32/3, 71/3, and 11 years, which are divisibly conjugated with the periods of changes of magnetic poles of the Sun. The concept proposed enables the prediction of PP oscillations.
Zooplankton of Anan'kin Bay (the Black Sea, Kiliya Delta of the Danube)
12
10.1615/HydrobJ.v38.i6.130
L. N.
Polishchuk
Odessa Branch of the Institute of Biology of the Southern Seas National Academy of Sciences of Ukraine Odessa, Ukraine
A. A.
Belokaminskiy
Odessa Branch of the Institute of Biology of the Southern Seas National Academy of Sciences of Ukraine Odessa, Ukraine
The freshwater bay was under study for two years. It was observed that zooplankton differs by its species diversity, numbers and biomass in the sections of the bay overgrown with different dominating higher aquatic plants, as well as in the section with the free water surface. The comparisons showed that four rather specific zooplankton complexes were formed, one of which was of 'Rotatoria type' and three other were of 'Cladocera type'.
Influence of Hydrological Factors on the Reproduction Efficiency of Stellate Sturgeon
12
10.1615/HydrobJ.v38.i6.140
P. V.
Veshchev
Caspian Research Institute of Fish Economy Astrakhan, Russia
Based on the statistics embracing the data for thirty years (1966-1995), a connection was revealed between yearly water-content and numbers of stellate sturgeon (Rus.: sevryuga) larvae migrating from the spawning grounds are essential factors on which reproduction of this fish species in the Lower Volga is dependent. The causes of decreasing sturgeon catches observed in the last decades are pointed out.
Regularities of Changes in Body Proportions of Bream (Abramis brama L., Cyprinidae) at Stages and Transitions of the Late Ontogenesis
12
10.1615/HydrobJ.v38.i6.150
T. S.
Zhiteneva
Institute of Biology of Inland Waters, Russian Academy of Sciences, Borok, Yaroslavl’ Region, Russia
Regular changes in bream body proportions, associated with the fish growth and development at stages and transitions of the late ontogenesis, were determined for various populations.
Influence of Intra-Waterbody Processes on the Content of Iodine in Waters of the Dnieper Reservoirs
7
10.1615/HydrobJ.v38.i6.160
A. V.
Shulyarenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
Dynamics of the content of iodine in waters of the Dnieper reservoirs were studied depending on some physical and chemical indices of water, including dissolved oxygen, water mineralization, pH, and organic matter. It has been found that the vital activity of phytoplankton affects the concentration of iodine in water. Relationship was established between the concentration of iodine and oxidative-reductive conditions of the aquatic environment.
Anthropic Changes in the Salt Composition of Water of Rivers of the Upper Reaches of the Ob' River Basin
10
10.1615/HydrobJ.v38.i6.170
G. K.
Parfenova
Tomsk State University, Tomsk, Russia
Data of long term (1954-1993) hydrochemical studies of rivers of the upper reaches of the Ob' river basin (the Western Siberia, Russia) were generalized. It has been found that the ion-salt composition of water, including НСО3-, SO42-, Сl-, Ca2+ Mg2+ and Na+ + K+ ions and their sum, changed depending on the composition of industrial sewage, volume of annual runoff, water consumption, and also on the hydrological regime of the studied rivers.