Begell House Inc.
Hydrobiological Journal
HYD
0018-8166
40
1
2004
Conceptual Approaches Concerning Formation of Transboundary Hydroecological Corridors
13
10.1615/HydrobJ.v40.i1.10
V. D.
Romanenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
I. V.
Grib
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
D. M.
Grodzinskiy
Institute of Hydrobiology, National Academy of Sciences of Ukraine; National University of Kyiv, Kyiv, Ukraine
The river and lake megaecosystems are considered as components of hydroecological corridors (passages) of global transfer of energy and matter, migration routes of animals, and as spatial complexes that are forming the environment and promoting the conservancy.
Studies on Phytoplankton of the Black Sea (review)
14
10.1615/HydrobJ.v40.i1.20
D. A.
Nesterova
Institute of Marine Biology, NAS Ukraine, 37, Pushkinskaya St., Odessa 65011, Ukraine
Data on phytoplankton of the Black Sea are generalized. Three main stages in its investigation are distinguished: 1) floristic stage (the latter part of the 19th century − the mid-twentieth century); 2) floristic and productional stage (the 1940s−1970s); and 3) ecological stage (the 1970s−the latter part of the 20th century). The species composition and functioning of phytoplankton were studied both in the coastal zone of the sea and in its open parts. Changes in the development of phytoplankton caused by eutrophication are analyzed.
Conditions of Development and Hatching from Resting Eggs in Polyphemus pediculus (Crustacea: Branchiopodiodes)
11
10.1615/HydrobJ.v40.i1.30
L. G.
Butorina
Institute of Biology of Inland Waters of Russian Academy of Sciences, Borok, Yaroslavl' Region
The young of P. pediculus hatch from resting eggs only after their stay in water at 2−6 °C for not less than 4−5 months. Hatching takes place at temperatures of 2−8 °C. Eggs retain their viability and produce the young after staying in water at 15−21 °C and 0 °C for 1.5−2 years and after drying for 9−12 months. Conditions of development and emerging of the young are genetically determined and are a consequence of combined effects of endogenous and exogenous factors, environmental temperature being the main factor. Duration of the dormancy period, rates of development of eggs and hatching of the young depend on the time when the eggs were laid, density and size of the laying, environmental conditions, and duration of their action at the dormancy and hatching periods.
Trophic Role of Plankton Algae in the Lakes of Various Types
10
10.1615/HydrobJ.v40.i1.40
V. N.
Nikulina
Zoological Institute Russian Academy of Sciences, Saint-Petersburg, Russia
The availability of plankton algae for filter feeding zooplankton (Cladocera) was studied in summer 1990−1997 in small lakes differing in their trophic levels, pH, color, transparency, etc. It has been found that the proportion of the biomass of phytoplankton available for Cladocera decreased with increasing the trophic level of the studied lakes. In the lakes characterized by a low productivity, Cladocera fed on mainly on algae marked by smaller dimensions, and also by a higher rate of their reproduction.
Structure and Seasonal Succession of Phytoplankton of Lake Pleshcheyevo (Russian Federation)
9
10.1615/HydrobJ.v40.i1.50
O. A.
Lyashenko
Institute of Biology of Inland Waters Russian Academy of Sciences, Borok, Russia
The structure and seasonal succession of phytoplankton of Lake Pleshcheyevo (Russian Federation) were studied on the basis of investigations carried out in 1991−1992 and 1996. Changes in the composition of the dominant complex, and also in the biomass of phytoplankton, are considered as a decrease in the trophic level of the lake.
Bacterial Co-oxidation of Natural Humic Substances in the Presence of Glucose
8
10.1615/HydrobJ.v40.i1.60
N.
Dzyuban
Institute of Biology of Inland Waters of Russian Academy of Sciences, Borok, Russia
E. S.
Bikbulatov
Institute of Biology of Inland Waters of Russian Academy of Sciences, Borok, Russia
E. M.
Bikbulatova
Institute of Biology of Inland Waters of Russian Academy of Sciences, Borok, Russia
I. A.
Kuznetsova
Institute of Biology of Inland Waters of Russian Academy of Sciences, Borok, Russia
The processes of co-oxidation of natural humic substances (HS) at the presence of glucose in concentrations of 10, 25, 100 mg C/L were studied. Is has been shown that for 112 days less than 10% of the initial HS was involved in bacterial metabolism.
Specific Dynamic Action of Food and Energy Metabolism of Fishes under Experimental and Natural Conditions
8
10.1615/HydrobJ.v40.i1.70
Yu. S.
Belokopytin
State Oceanarium of the Ministry of Defense and National Academy of Sciences of Ukraine, Sevastopol, Ukraine
Based on literature and original experimental (aquarium) and natural (the Mediterranean Sea) data, the author’s point of view on the nature of the specific dynamic food effect (SDA) in fishes is substantiated. It is concluded that, in fishes the SDA exists constantly because this effect is supported by continuously proceeding digestion of food. The intensity and duration of the SDA as an energy metabolic process depend on the ratios of chemical components in food.
Assessment of the Toxicity of T-2 Mycotoxin for Daphnia magna Straus Using the Method of Exited Chemiluminescence
6
10.1615/HydrobJ.v40.i1.80
O. S.
Goyster
Institute of Biochemistry, National Academy of Sciences of Ukraine; and National Agricultural University, Kiev, Ukraine
N. F.
Starodub
Institute of Biochemistry, National Academy of Sciences of Ukraine; and National Agricultural University, Kiev, Ukraine
G. A.
Khmelnitskiy
Institute of Biochemistry, National Academy of Sciences of Ukraine; National Agricultural University, Kiev, Ukraine
The effects of T-2 toxin, a metabolite of fungi of the genus Fusarium, on Daphnia magna were studied. Mycelial mold fungi affect grain products and the toxin under study causes pathological changes in the organism of mammals. LC50 of T-2 toxin for water fleas equals 0.07 mg/L. 100% mortality in these crustaceans was registered at 0.5 mg/L. There were analyzed changes of levels of excited chemiluminescence intensity of the water ambient for D. magna at various concentrations of T-2 toxin and varied duration of experiments. Chemiluminescence indication is proposed to be used for express testing.
Phosphorus Balance in Fishes under the Influence of Heavy Metals (Cr6+, Ni2+) Contained in the Aquatic Environment
10
10.1615/HydrobJ.v40.i1.90
V. P.
Gandzyura
Kyiv National University, Kyiv, Ukraine
Essential disturbances in phosphorous balance were established in freshwater fishes as the responses to enhanced contents (from 1 MPC and more) of Cr6+ and Ni2+ in their aquatic environment. The effects of these metals are manifested in a considerably increased level of phosphorus excretion and its decreased content in fish body.
Composition of Dissolved Organic Matter in Some Tributaries of the Dnieper River Depending on the Development of Planktonic Algae
12
10.1615/HydrobJ.v40.i1.100
T. A.
Vasilchuk
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine
Seasonal dynamics of the con tent and molecular-mass distribution of humic and protein-like sub stances and carbohydrates in the water of three tributaries of the Dnieper river, including the Pripyat, Zdvizh and Irpen rivers, were studied. The scheme of systematical analysis of dissolved organic matter of natural waters was used for isolating these substances. Relation ship was established between the intensity of development of phytoplankton and dynamics of the content of the above-mentioned organic compounds in the studied water courses.
Activity of the Sun and Water “Bloom”
9
10.1615/HydrobJ.v40.i1.110
L. A.
Sirenko
Institute of Hydrobiology, National Academy of Sciences of Ukraine, 12, Pr. Geroyev Stalingrada, 04210 Kiev, Ukraine
It has been analyzed the dynamics of phytoplankton development in three water bodies of the Dnieper tandem storage reservoir system for the period of 30 years. The comparisons showed that the intensity of water ‘bloom’ caused by blue-green algae (cyanoprokaryotes) was evidently higher, and this process was prolonged, in the years of lower solar activity. The ‘bloom’ intensity decreases in years of high solar activity (11-year cycle). Such effect is connected with the peculiarities in the structure and photochemical activity of pigment phothosystems in different taxonomic groups of algae.