Begell House Inc.
Hydrobiological Journal
HYD
0018-8166
50
1
2014
Conceptual Models of the Contourization Processes in the Aquatic Ecosystems
3-19
10.1615/HydrobJ.v50.i1.10
A. A.
Protasov
Institute of Biodiversity and Ecosystem Studies of Bulgarian Academy of Sciences, Sofia, Bulgaria; Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kyiv, 04210, Ukraine
contourization
models
production-destruction processes
contour community periphyton
benthos
benthification
ecosystem.
Paper deals with various manifestations of the contourization processes, which is considered as significant shift of the production-destruction processes from the pelagic community to the contour ones (periphyton and benthos), caused by different reasons. Conceptual models of the contourization processes are given and discussed.
Production Characteristics of Monocyclic Species of Chironomidae (Diptera)
20-29
10.1615/HydrobJ.v50.i1.20
G. Kh.
Shcherbina
Institute of Biology of Inland Waters Borok, Russia
production
P/B-coefficient
Chironomidae
generation
freshwater ecosystems.
The production and P/Baverage-coefficients of six mass species of Chironomidae occurring in various biotopes and at different depths of Lake Vishtynetskoye and of the Rybinsk Reservoir were investigated. The average value of P/Baverage-coefficient equal to 3.0 ± 0.1 was calculated based on original and literature data. This value should be used in determining production of one Chironomidae generation regardless of the depth, trophic level, and geographic dislocation of water bodies.
Mechanisms and Peculiarities of the Functioning of Pelagic Zooplankton of the Dnieper Reservoirs (on the Example of the Upper Section of the Kanev Reservoir)
30-47
10.1615/HydrobJ.v50.i1.30
O. V.
Pashkova
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
ecosystem functioning
mechanisms
zooplankton
reservoir
interannual
seasonal
and daily dynamics.
The paper is dealt with the study of the main mechanisms of the functioning of pelagic zooplankton of the upper section of the Kanev Reservoir, and also of its interannual, seasonal, and daily dynamics. Relationship was established between the quantitative indices of zooplankton development and such environmental factors as water temperature and runoff volume.
Size Structure Dynamics of the Sexual Maturation and Breeding Power of the Long-clawed Crayfish Astacus leptodactylus of the Water Bodies of Belarus and Armenia
48-60
10.1615/HydrobJ.v50.i1.40
A. V.
Alekhnovych
Research-Practical Center of the National Academy of Sciences of Belarus on Bioresources,
Minsk, Belarus
E. Kh.
Ghukasian
Institute of Hydroecology and Ichthyology National Academy of Sciences of Armenia Yerevan, Armenia
the narrow-clawed crayfish Astacus leptodactylus
lakes of Belarus and Armenia
breeding power
sexual maturation
size structure.
Paper deals with characteristics of populations of the narrow-clawed crayfish in the water bodies of Belarus and Armenia. The growth rate, beginning of the sexual maturation and average size of females at 50% maturity in the Belarusian lakes Gin'kovo and Sominskoye and Armenian Sevan Lake were found to be quite comparable. Coupling and oviposition onto the pleopods in the Belarusian population occur in late October − early November, in the Sevan population − in the early April; breeding power of the Sevan population is 1.5 times higher than those of Belarusian. In spite of the all-year intensive commercial catching, average size of the specimens of in the Sevan population is somewhat more than in Belarusian.
Impact of Temperature Fluctuations on Embryonic-larval Development of Esox lucius L. (Salmoniformes, Esocidae)
61-71
10.1615/HydrobJ.v50.i1.50
V. A.
Kuznetsov
Mordovian State University, Saransk, Russian Federation
S. V.
Lukiyanov
University of Mordovia Saransk, Russian Federation
embryonic-larval development
temperature
pike Esox lucius
variable thermal regime
pre-larva
lineal growth.
Fluctuations of temperature within the limits of ecological norm were shown to affect positively embryonic and larval development of Esox lucius L. In optimal temperature regimes growth and development were accelerated, survival rate of embryos and larvae increased (especially during the critical periods of development), growth became more synchronous. Taking into account high mortality of fishes and other poikilotherms in early ontogenesis, optimization of their cultivation in variable temperature regimes can be one of the main ways to increase efficiency of artificial reproduction.
Radiation Dose Formation in Freshwater Fishes at the Embryonic Stage of Their Development
72-80
10.1615/HydrobJ.v50.i1.60
Ye. N.
Volkova
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev
V. V.
Beliayev
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev
A. A.
Parkhomenko
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
S. P.
Prishlyak
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine
fish embryos
dose rate
90Sr
I37Cs.
The peculiarities of radiation dose formation were studied in freshwater fishes at the embryonic stage of their development. In this case, β- and γ -irradiation of 137Cs and β-irradiation of 90Sr were determined in the water, bottom sediments, and higher aquatic plants. In addition, β-irradiation of the incorporated radionuclide was also determined. Fish embryos occurring on different substrata and at different temperatures were investigated. It has been found that the dose rate of fish embryos of the Kiev Reservoir accounts for 183−8000 nG/day. The principle of ecological standardization of radionuclide contamination of bottom sediments of fresh water bodies was put forward on the basis of the performed calculations.
Copper in Surface Waters of Ukraine: Content, Forms of Occurrence, and Regularities of Migration
81-99
10.1615/HydrobJ.v50.i1.70
P.N.
Linnik
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
copper
forms of occurrence
labile fraction
complex compounds
molecular-mass distribution
humic substances
reservoirs
rivers
lakes.
Results of long-term investigations of Cu(II) in various water bodies of Ukraine (reservoirs, rivers, and lakes) are given in the paper. It has been found that the content of Cu(II) varies over a wide range − from 3.6 to 62.5 µg/L. In the Dnieper reservoirs, the concentration of Cu(II) increases downstream of the Kiev Reservoir, which is conditioned by the influence of anthropogenic load. The lowest content of Cu(II) is observed in the rivers of the Pripyat River basin. In the studied water bodies, copper migrates mainly in the dissolved state. However, in the water bodies characterized by the formation of anaerobic zones with the presence of H2S in the near-bottom layer of water the content of the suspended form of copper can be higher than that of the dissolved form. The content of the labile fraction of Cu(II), as potentially toxic, accounts for 0.4−8.5 µg/L (7.2−35.0% Cudissolved). The data on the distribution of Cu(II) among its complex compounds with dissolved organic matter are discussed in the paper. It has been shown that the anionic complexes of Cu(II) with humic substances predominate (44.8−78.2% Cudissolved). Results of the study of the molecular-mass distribution of the anionic complexes of Cu(II) are also discussed in the paper.
Peculiarities of Diagnostics of the Functional State of the Unicellular Algae in the Liquid Media by Luminescent Method
100-106
10.1615/HydrobJ.v50.i1.80
O. V.
Vakulenko
Taras Shevchenko National University Kyiv, Ukraine
O. O.
Grigorieva
Taras Shevchenko Kiev National University, Kiev, Ukraine
M. A.
Berezovskaya
Taras Shevchenko Kiev National University, Kiev, Ukraine
A. I.
Datsenko
Taras Shevchenko National University Kyiv, Ukraine
unicellular algae
diagnostics
photoluminescence
functional state.
Peculiarities of application of the luminescent methods for determination of the functional state of the unicellular algae in the liquid media are considered in brief. Use of traditional method of the fluorescence induction in this case is complicated; however diagnostics can be carried out by static intensity and spectra of the chlorophyll α photoluminescence at the room and low temperature. Luminescence parameters are noted which can be used for assessment of the cells functional state in culture. Length of excitation wave should be taken into account. The method is proposed enabling to mitigate effect of fluorescence induction on measurement results.