Библиотека института биофизики СО РАН

Главная

Базы данных

Труды сотрудников ИБФ СО РАН - результаты поиска

Вид поиска

Каталог книг и продолжающихся изданий библиотеки Института биофизики СО РАН

Иностранные журналы библиотеки Института биофизики СО РАН

Отечественные журналы библиотеки Института биофизики СО РАН

Каталог диссертаций ИБФ СО РАН

Труды сотрудников ИБФ СО РАН

Область поиска

в найденном

Найдено в других БД:

Каталог книг и продолжающихся изданий библиотеки Института биофизики СО РАН (13)

Иностранные журналы библиотеки Института биофизики СО РАН (1)

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>K=population<.>)

Общее количество найденных документов : 128
Показаны документы с 1 по 20

1-20 21-40 41-60 61-80 81-100 101-120

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shuvaev A.N., Brilkov A.V.
Заглавие : A model of bacterial cell cycle duration based on DnaA dynamics and estimation of the population cost of bacterial plasmids
Колич.характеристики :4 с
Место публикации : Dokl. Biochem. Biophys.: SPRINGER, 2007. - Vol. 416, Is. 01.06.2013. - С. 233-236. - ISSN 1607-6729, DOI 10.1134/S1607672907050018
Примечания : Cited References: 17
Предметные рубрики: ESCHERICHIA-COLI
GROWTH-RATE
PARAMETERS
SIZE
TIME
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : DEGERMENDZHI A.G., ADAMOVICH V.V., ADAMOVICH V.A.
Заглавие : A NEW EXPERIMENTAL-METHOD TO REVEAL DENSITY-DEPENDENT CHEMICAL FACTORS INVOLVED IN MICROBIAL-POPULATION GROWTH-CONTROL
Место публикации : Microbiology: MAIK NAUKA/INTERPERIODICA, 1993. - Vol. 62, Is. 3. - С. 308-313. - 6. - ISSN 0026-2617
Примечания : Cited References: 11
Аннотация: Experiments based on an earlier developed theory with a culture of Escherichia coli 0-124 were undertaken to determine the feedback strength (FBS) in growth control. FBS is defined as the change in growth acceleration brought about by a discontinuous reduction in microbial concentration under conditions of constant chemical composition of the medium, and is an over-all measure of the regulatory influence of all chemical factors dependent on biomass concentration. FBS was determined for batch cultivation with glucose. In various growth phases the culture was diluted by its own filtrate and then the change in growth acceleration as compared to the control was measured. FBS was reliably different from zero at the end of the exponential phase and in the phase of decelerated growth and was of the order of -20 to -200 (h.g/liter)(-1). The feedback component due to glucose alone was estimated using the obtained relation between specific growth rate and glucose concentration (mu(max) = 0.55 +/- 0.05 h(-1), K-s = 2.5 +/- 0.7 mg/liter). The glucose-dependent regulatory contribution to FBS was found to be as low as 0.5 to 40%, which suggests the presence of other growth control factors. Upon accuracy improvements, this method may develop into an accepted microbiological tool for identifying major density-dependent factors involved in microbial growth control.
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Prokopkin I.G., Barkhatov Y.V., Khromechek E.B.
Заглавие : A one-dimensional model for phytoflagellate distribution in the meromictic lake
Колич.характеристики :8 с
Коллективы : Russian Foundation for Basic Research (RFBR) [13-04-01514]; Integrative Project of Siberian Branch of Russian Academy of Sciences [56]
Место публикации : Ecol. Model.: ELSEVIER SCIENCE BV, 2014. - Vol. 288. - P1-8. - ISSN 0304-3800, DOI 10.1016/j.ecolmode1.2014.05.011. - ISSN 1872-7026
Примечания : Cited References: 22. - This work was supported by Russian Foundation for Basic Research (RFBR) No. 13-04-01514 and Integrative Project of Siberian Branch of Russian Academy of Sciences No. 56. The anonymous reviewers are kindly acknowledged for valuable suggestions and criticism.
Предметные рубрики: VERTICAL-DISTRIBUTION
CHLOROPHYLL MAXIMUM
SOUTH SIBERIA
RUSSIA
KHAKASIA
SHIRA
CRYPTOPHYTES
CRYPTOMONAS
CHEMOCLINE
MIGRATION
Ключевые слова (''Своб.индексиров.''): phytoflagellates--meromictic lake--simulation modeling--lake shira
Аннотация: Using mathematical modeling methods, the work investigates possible existence of a phytoflagellate population in the ecosystem of a stratified lake (Lake Shira, Khakasia, Russia). Until this study was carried out, no phytoflagellate population had been detected in the lake, although there had been indirect evidence of the possible presence of a cryptomonad population in this water body. To answer the question if this population may be present in this water body, as the first step of investigation, a mathematical model was developed describing the microorganism biomass dynamics and phytoflagellate relationship with the lake food web. The calculations showed that cryptophytic algae were abundant in the water column layers above the lake chemocline at the beginning of summer but showed low biomass concentrations during other periods of time. In the summer following the construction of the model, samples were collected from Lake Shira, as the next step of the study. A cryptophytic algae population was found in the water column, and the pattern of its distribution in the ecosystem was similar to that predicted by the model. In addition to that, we studied theoretically possible reasons for the early summer development of the population in the deep water layers and found that it was the result of the mixotrophic feeding strategy of cryptomonads and trophic interactions in the food web. The study shows that preliminary modeling of the locational and temporal distribution of populations whose presence in the ecosystem is only suggested by indirect evidence may be useful as a tool for searching for the species in natural ecosystems and as an approach enabling a more accurate description of the food web structure of a water body. (C) 2014 Elsevier B.V. All rights reserved.
WOS
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Popova L.Y., Kargatova T.V., Maksimova E.E., Belyavskaya V.A.
Заглавие : A study on the possibility of environmental adaptation of a Bacillus subtilis strain containing a recombinant plasmid with the gene of human interferon alpha 2
Колич.характеристики :5 с
Место публикации : Microbiology: MAIK NAUKA/INTERPERIODICA, 1997. - Vol. 66, Is. 6. - P637-641. - ISSN 0026-2617
Примечания : Cited References: 13
Предметные рубрики: GENETICALLY-MODIFIED MICROORGANISMS
Ключевые слова (''Своб.индексиров.''): microecosystem--bacillus subtilis--recombinant plasmid--interferon--adaptation
Аннотация: Adaptation of the Bacillus subtilis strain 2335/105 (Km(r)Inf(+)) containing a recombinant plasmid encoding the extracellular human interferon alpha 2 was studied under various conditions. Stability of the plasmid in the population of B. subtilis 2335/105 was estimated under nonselective conditions. The plasmid-free cells and cells with a low number of plasmid copies were found to accumulate progressively, constituting 80% of the population after 10 culture passages, indicating the poor competitiveness of cells carrying a high number of plasmid copies. The behavior of vegetative cells of the recombinant strain introduced into aquatic microcosms differing in trophic chain length was studied. Within the first 10 days, the lysis of vegetative cells of B. subtilis 2335/105 occurred; the number of viable spores was very low but remained constant for half a year.
WOS
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Hellweger F.L., Kravchuk E.S., Novotny V., Gladyshev M.I.
Заглавие : Agent-based modeling of the complex life cycle of a cyanobacterium (Anabaena) in a shallow reservoir
Место публикации : Limnology and Oceanography. - 2008. - Vol. 53, Is. 4. - С. 1227-1241. - ISSN 00243590 (ISSN)
Ключевые слова (''Своб.индексиров.''): algal bloom--annual variation--cyanobacterium--ecological modeling--eulerian analysis--experimental study--lagrangian analysis--life cycle--nutrient availability--phytoplankton--population dynamics--reservoir--shallow water--survival--water column--bugach reservoir--eurasia--krasnoyarsk [russian federation]--russian federation--anabaena--anabaena flos-aquae
Аннотация: The cyanobacterium Anabaena flos-aquae and many other phytoplankton species have a complex life cycle that includes a resting stage (akinete). We present a new agent-based (also known as individual-based) model of Anabaena that includes the formation and behavior of akinetes. The model is part of a coupled Eulerian-Lagrangian model and can reproduce the main features of the observed seasonal and interannual population dynamics in Bugach Reservoir (Siberia), including an unexpectedly large bloom in a year with low nutrient concentrations. Model analysis shows that the internal loading of phosphorus (P) due to germination from the sediment bed is ?10% of the total input. However, most of the long-term nutrient uptake for Anabaena occurs in the sediment bed, which suggests that the sediment bed is not just a convenient overwintering location but may also be the primary source of nutrients. An in silico tracing experiment showed that most water column cells (?90%) originated from cells located in the sediment bed during the preceding winter. An in silico gene knockout experiment (akinete formation is prohibited) showed that the formation of resting stages is of critical importance to the survival of the population on an annual basis. A nutrient-reduction management scenario indicates that Anabaena densities increase because they are less sensitive to water column nutrient levels (because of the sediment bed source) than other species. В© 2008, by the American Society of Limnology and Oceanography, Inc.
Scopus
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sukhovol'skii V.G., Khlebopros R.G., Iskhakov T.R.
Заглавие : An optimization model of competition between species for resource.
Место публикации : Doklady. Biochemistry and biophysics. - 2003. - Vol. 390. - С. 171-173. - ISSN 16076729 (ISSN)
Ключевые слова (''Своб.индексиров.''): animal--article--biological model--comparative study--competitive behavior--computer simulation--ecosystem--evaluation--growth, development and aging--insect--physiology--plankton--population dynamics--population growth--quality control--species difference--validation study--animals--competitive behavior--computer simulation--ecosystem--insects--models, biological--plankton--population dynamics--population growth--quality control--species specificity
Scopus
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T.A., Trofimova E.A., Dementyev D.V., Bolsunovsky A.Y.
Заглавие : Bioaccumulation, inter-organ distribution, and retention of waterborne and dietary Am-241 in silver crucian carp
Колич.характеристики :12 с
Место публикации : Toxicol Environ. Chem.: TAYLOR & FRANCIS LTD, 2014. - Vol. 96, Is. 2. - С. 243-254. - ISSN 0277-2248, DOI 10.1080/02772248.2014.941368. - ISSN 1029-0486
Примечания : Cited References: 25
Предметные рубрики: YENISEI RIVER
TELEOST FISH
RADIONUCLIDES
METALS
AMERICIUM
EXPOSURE
ELEMENTS
ASSIMILATION
ELASMOBRANCH
DEPURATION
Ключевые слова (''Своб.индексиров.''): americium-241--assimilation--carassius auratus gibelio--force-feeding
Аннотация: The bioaccumulation of actinide Am-241 from food and water in bodies of freshwater fish (Carassius auratus gibelio, silver crucian carp) has been investigated in laboratory experiments. Homogenized biomass of submerged macrophytes labeled with Am-241 was injected into the fish gullet. Internal organs and tissues of crucian carp could be ranked according to activity concentration of dietary Am-241 after depuration of the digestive tract as follows: liver gonads bones muscles. Accumulation of waterborne Am-241 in internal organs and tissues of crucian carp mainly occurred via the digestive tract. While the concentration of Am-241 in liver of crucian carps decreased during depuration time, its concentration in bones increased indicating slower transfer of Am-241 to skeleton compared to muscles and liver. The retention of dietary Am-241 in the bodies of crucian carp reached 35%-46% of ingested Am-241: 20%-31% was retained in liver, 0.6%-0.8% in skeleton, and 1.4%-2.0% in muscles. The concentration factor of Am-241 from water was 0.4 for the whole body, 0.3 for liver, 0.01 for muscles, and 0.01 for skeleton. Trace amounts of Am-241 were recorded in viscera and muscles of a wild population of silver crucian carp inhabiting a radioactively contaminated part of the Yenisei River.
WOS,
Scopus
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bashmakova E. E., Krasitskaya V. V., Bondar A. A., Eremina E. N., Slepov E. V., Zukov R. A., Frank L. A.
Заглавие : Bioluminescent SNP genotyping technique: Development and application for detection of melanocortin 1 receptor gene polymorphisms
Место публикации : Talanta: Elsevier B.V., 2018. - Vol. 189. - С. 111-115. - ISSN 00399140 (ISSN) , DOI 10.1016/j.talanta.2018.06.057
Ключевые слова (''Своб.индексиров.''): ca2+-regulated photoprotein obelin--genotyping--melanocortin 1 receptor gene--single nucleotide polymorphisms (snp)--bioluminescence--clinical research--curricula--diagnosis--genes--oncology--biomedical research--clinical characteristics--development and applications--genotyping--healthy individuals--photoproteins--receptor genes--single-nucleotide polymorphisms--dermatology
Аннотация: SNP genotyping based on the reaction of specific primer extension with the following bioluminescent detection of its products was shown to be potentially applicable for biomedical exploration. The paper describes its elaboration and first application in extensive biomedical research concerning MC1R gene variants’ frequency and associations with clinical characteristics in melanoma patients of Eastern Siberia (Krasnoyarsk region, Russia). Polymorphisms rs 1805007 (R151C), rs 1805008 (R160W), and rs 1805009 (D294H) were detected in 174 DNA samples from patients with histologically proved diagnosis of cutaneous melanoma and in 200 samples from healthy individuals. All the results on bioluminescent SNP genotyping were confirmed by Sanger sequencing. Some features characteristic of the population were found, i.e. melanoma is mostly associated with R160W or R151C while variant D294H is extremely rare; simultaneous carriage of any two investigated variants is also strongly associated with melanoma; R151C is associated with ulceration and consequently the disease course is more aggressive, etc. The design of the technique allows fast evaluation of any known diagnostically important SNP frequencies and associations across population. © 2018 Elsevier B.V.
Scopus,
Смотреть статью,
WOS
Найти похожие

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mooij W.M., Trolle D., Jeppesen E., Arhonditsis G., Belolipetsky P.V., Chitamwebwa D.B.R., Degermendzhy A.G., DeAngelis D.L., De Senerpont Domis L.N., Downing A.S., Elliott J.A., Fragoso Jr. C.R., Gaedke U., Genova S.N., Gulati R.D., Hakanson L., Hamilton D.P., Hipsey M.R., 't Hoen J., Hulsmann S., Los F.H., Makler-Pick V., Petzoldt T., Prokopkin I.G., Rinke K., Schep S.A., Tominaga K., van Dam A.A., van Nes E.H., Wells S.A., Janse J.H.
Заглавие : Challenges and opportunities for integrating lake ecosystem modelling approaches
Место публикации : Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - С. 633-667. - ISSN 13862588 (ISSN) , DOI 10.1007/s10452-010-9339-3
Ключевые слова (''Своб.индексиров.''): adaptive processes--analysis--aquatic--bifurcation--biodiversity--climate warming--community--eutrophication--fisheries--food web dynamics--freshwater--global change--hydrology--lake--management--marine--mitigation--model integration--model limitations--non-linear dynamics--nutrients--plankton--population--prediction--spatial--understanding--adaptive management--algorithm--aquatic community--biodiversity--ecosystem modeling--eutrophication--fishery production--food web--fuzzy mathematics--global warming--hydrology--lake ecosystem--mitigation--model test--numerical model--nutrient availability--plankton--prediction--saline lake--spatial analysis
Аннотация: A large number and wide variety of lake ecosystem models have been developed and published during the past four decades. We identify two challenges for making further progress in this field. One such challenge is to avoid developing more models largely following the concept of others ('reinventing the wheel'). The other challenge is to avoid focusing on only one type of model, while ignoring new and diverse approaches that have become available ('having tunnel vision'). In this paper, we aim at improving the awareness of existing models and knowledge of concurrent approaches in lake ecosystem modelling, without covering all possible model tools and avenues. First, we present a broad variety of modelling approaches. To illustrate these approaches, we give brief descriptions of rather arbitrarily selected sets of specific models. We deal with static models (steady state and regression models), complex dynamic models (CAEDYM, CE-QUAL-W2, Delft 3D-ECO, LakeMab, LakeWeb, MyLake, PCLake, PROTECH, SALMO), structurally dynamic models and minimal dynamic models. We also discuss a group of approaches that could all be classified as individual based: super-individual models (Piscator, Charisma), physiologically structured models, stage-structured models and trait-based models. We briefly mention genetic algorithms, neural networks, Kalman filters and fuzzy logic. Thereafter, we zoom in, as an in-depth example, on the multi-decadal development and application of the lake ecosystem model PCLake and related models (PCLake Metamodel, Lake Shira Model, IPH-TRIM3D-PCLake). In the discussion, we argue that while the historical development of each approach and model is understandable given its 'leading principle', there are many opportunities for combining approaches. We take the point of view that a single 'right' approach does not exist and should not be strived for. Instead, multiple modelling approaches, applied concurrently to a given problem, can help develop an integrative view on the functioning of lake ecosystems. We end with a set of specific recommendations that may be of help in the further development of lake ecosystem models. В© 2010 The Author(s).
Scopus
Найти похожие

10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T., Medvedeva M., Trofimova E., Alexandrova Y., Dementyev D., Bolsunovsky A.
Заглавие : Chromosomal abnormalities in roots of aquatic plant Elodea canadensis as a tool for testing genotoxicity of bottom sediments
Место публикации : Ecotoxicol. Environ. Saf. - 2015. - Vol. 122. - С. 384-391. - ISSN 01476513 (ISSN) , DOI 10.1016/j.ecoenv.2015.08.021
Ключевые слова (''Своб.индексиров.''): anaphase-telophase--chromosome damage--heavy metals--macrophyte--radionuclides--sediment-contact tests--elodea canadensis
Аннотация: Submersed freshwater macrophytes are considered as relevant indicators for use in bulk bottom sediment contact tests. The purpose of this study was to estimate the validity of endpoints of aquatic plant Elodea canadensis for laboratory genotoxicity testing of natural bottom sediments. The inherent level of chromosome abnormalities (on artificial sediments) in roots of E. canadensis under laboratory conditions was lower than the percentage of abnormal cells in bulk sediments from the Yenisei River. The percentage of abnormal cells in roots of E. canadensis was more sensitive to the presence of genotoxic agents in laboratory contact tests than in the natural population of the plant. The spectra of chromosomal abnormalities that occur in roots of E. canadensis under natural conditions in the Yenisei River and in laboratory contact tests on the bulk bottom sediments from the Yenisei River were similar. Hence, chromosome abnormalities in roots of E. canadensis can be used as a relevant and sensitive genotoxicity endpoint in bottom sediment-contact tests. © 2015 Elsevier Inc.
Scopus,
WOS
Найти похожие

11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pechurkin N.S., Shirobokova I.M.
Заглавие : Closed artificial ecosystems as a means of ecosystem studies for earth and space needs
Место публикации : Advances in Space Research. - 2001. - Vol. 27, Is. 9. - С. 1497-1504. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(01)00244-7
Ключевые слова (''Своб.индексиров.''): artificial ecosystem--bioremediation--biosphere--ecosystem--environmental monitoring--model--bioremediation--ecology--ecosystems--health--biosphere--space research--artificial ecosystem--biodegradation, environmental--earth (planet)--ecological systems, closed--ecology--ecosystem--energy transfer--environmental microbiology--life support systems--population dynamics--yeasts
Аннотация: Closed Artificial ecosystems (CAES) have good prospects for wide use as new means for quantitative studies of different types of both natural ecosystems and man-made ones. The paper deals with the discussion of three points of CAES applications. The first one is of importance for theoretical ecology development and is connected with bringing together В«holisticВ» and В«merologicalВ» approaches in ecosystems studies. Using CAES, we can combine both approaches, taking into account the biotic turnover of limiting substrates which few in number even for complicated natural ecosystems. The second CAES use concerns the development of В«ecosystems healthВ» concept and application of a key-factor-approach for the indication and measurement of healthy unhealthy state and functioning of ecosystems or their links. The third use is more of an applied nature, oriented to the intensification of bioremediation or biodepollution processes in different types of ecosystems, including the global biosphere. В© 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
Scopus
Найти похожие

12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kargatova T.V., Maksimova E.E., Popova L.Y.
Заглавие : Coexistence of genetically engineered Escherichia coli strains and natural microorganisms in experimental aquatic microcosms
Колич.характеристики :6 с
Место публикации : Microbiology: MAIK NAUKA/INTERPERIODICA, 2001. - Vol. 70, Is. 2. - P211-216. - ISSN 0026-2617, DOI 10.1023/A:1010437731920
Примечания : Cited References: 17
Предметные рубрики: SURVIVAL
BACTERIA
GROWTH
Ключевые слова (''Своб.индексиров.''): escherichia coli--aquatic microecosystems--recombinant plasmid
Аннотация: In experimental aquatic microcosms (AMCs), the population of the Escherichia coli strain Z905 harboring the recombinant plasmid pPHL7 (Ap(r)Lux(+)) was found to gradually accumulate AMC-adapted cells, which retained the plasmid but differed from the original cells in some biochemical and physiological characteristics. Both the original and the AMC-adapted E. coil cells could coexist with the native AMC microflora for one year or longer. When introduced into AMCs together with native pseudomonads, the AMC-adapted E. coil Z905-33 (pPHL7) cells were more competitive than the nonadapted cells.
WOS
Найти похожие

13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina T. A., Anishchenko, O., V, Trofimova E. A., Dementiev, D., V
Заглавие : Comparative Assessment of the Content of Transition Metals (Cu, Zn, Mn, Pb, and Cd) and Radiocesium (Cs-137) in Pike (Esox lucius) and Burbot (Lota lota) of the Yenisei River
Колич.характеристики :9 с
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-44-240003]; Government of Krasnoyarsk krai; Krasnoyarsk Regional Fund for Support of Scientific and Technical Activity [20-44-240004]
Место публикации : Contemp. Probl. Ecol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2022. - Vol. 15, Is. 1. - С. 91-99. - ISSN 1995-4255, DOI 10.1134/S1995425522010115. - ISSN 1995-4263(eISSN)
Примечания : Cited References:36. - This work was supported by the Russian Foundation for Basic Research, grant no. 18-44-240003, and the Government of Krasnoyarsk krai, together with the Krasnoyarsk Regional Fund for Support of Scientific and Technical Activity, grant no. 20-44-240004.
Предметные рубрики: FRESH-WATER FISH
NORTHERN PIKE
HEAVY-METALS
BRAMA L.
FOOD-WEB
SIZE
Аннотация: The trophic position of fish is one of the most important factors controlling the accumulation of potentially toxic elements and compounds in fish tissues, primarily via the spectrum of fish nutrition. In this study, the content of potentially toxic transition metals (Cu, Zn, Mn, Pb, and Cd) and radiocesium (Cs-137) in the edible tissues (muscles and liver) of two representatives of the fish-eating ichthyofauna of the Yenisei River, northern pike (Esox lucius) and burbot (Lota lota), have been comparatively studied relatively to the size of the fish. A significant decrease in the content of radiocesium and zinc in the muscles of pike and zinc in the liver of pike with an increase in body size has been recorded in juvenile pikes with a body weight (W) of less than 0.35 kg. For larger sexually mature pikes, no significant size dependences of the accumulation of metals in tissues are found. A positive correlation is found between the content of Cs-137, Cu, Zn, and Mn in muscles and the size of burbot in the W range from 0.42 to 1.62 kg. The tissues of burbots and pikes of the same size significantly (p 0.05) differ in the concentration of metals in their tissues: concentrations of Zn and Mn are 1.6-2.2 times higher in the muscle of burbot; the concentration of Pb is 1.8 times higher in muscle of pike; Cu is twice as high in the liver of burbot; and Zn and Mn are 4.7 and 1.6 times higher in the liver of pike, respectively. These differences may be due to the different food spectra of pike and burbot. Concentrations of Cu, Zn, and Mn in the liver of pike are 3-7 times higher than in muscle; the concentration of Cu in the liver of burbot is 5 times higher than in muscle. Pb and Cd tend to be higher in liver than muscle for both fish species. Despite the revealed size dependences, the concentrations of potentially toxic metals and radiocesium in the muscles and liver of fish are below the permissible concentrations for food. These results can be used to assess environmental risks for the population consuming fish, as well as to plan for the long-term environmental monitoring of rivers using representatives of piscivorous fish.
WOS
Найти похожие

14.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pisman T.I., Pechurkin N.S., Somova L.A.
Заглавие : Competition between links in "producer-consumer" trophic chains in an aquatic closed system with spatially separated components
Колич.характеристики :5 с
Место публикации : SPACE LIFE SCIENCES: CLOSED ECOLOGICAL SYSTEMS: EARTH AND SPACE APPLICATIONS. Ser. ADVANCES IN SPACE RESEARCH: ELSEVIER SCIENCE BV, 2001. - Vol. 27: F4 4 Symposium of COSPAR Scientific Commission F held at the 33rd COSPAR Scientific Assembly (JUL, 2000, WARSAW, POLAND), Is. 9. - P1599-1603. - ISBN 0273-1177, DOI 10.1016/S0273-1177(01)00255-1
Примечания : Cited References: 13
Аннотация: The work analyzes functioning of a "producer-consumer" closed aquatic system with spatially separated links, where each component consisted of two species. Producers in the system were the microalgae of Chlorella vulgaris and Scenedesmus sp., consumers - Paramecium caudatum infusoria and Brachionus sp. rotifers. In the experiment the competing predators were consuming on a mixed culture of algae, and the competition of algae was studied under nitrogen limitation. Under these conditions competitiveness of Scenedesmus was higher than that of Chlorella vulgaris. Metabolism products of Scenedesmus algae have been found to have negative effect on reproduction of Paramecium caudatum protozoa. Predator population dynamics in the "consumer" link demonstrated that the rotifers that consume two algal species are more competitive compared to protozoa feeding on chlorella only. (C) 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
WOS
Найти похожие

15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I., Pechurkin N.S., Somova L.A.
Заглавие : Competition between links in "producers-consumer" trophic chains in an aquatic closed system with spatially separated components
Место публикации : Advances in Space Research. - 2001. - Vol. 27, Is. 9. - С. 1599-1603. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(01)00255-1
Ключевые слова (''Своб.индексиров.''): algae--aquifers--biodiversity--metabolism--nitrogen--protozoa--aquatic closed systems--spatially separated components--space research--aquatic ecosystem--competition--grazing--primary production--fresh water--nitrogen--animal--article--chlorella--food chain--green alga--metabolism--microclimate--paramecium--rotifera--algae, green--animals--chlorella--ecological systems, closed--food chain--fresh water--nitrogen--paramecium--rotifera
Аннотация: The work analyzes functioning of a "producer-consumer" closed aquatic system with spatially separated links, where each component consisted of two species. Producers in the system were the microalgae of Chlorella vulgaris and Scenedesmus sp., consumers - Paramecium caudatum infusoria and Brachionus sp. rotifers. In the experiment the competing predators were consuming on a mixed culture of algae, and the competition of algae was studied under nitrogen limitation. Under these conditions competitiveness of Scenedemus was higher than that of Chlorella vulgaris. Metabolism products of Scenedesmus algae have been found to have negative effect on reproduction of Paramecium caudatum protozoa. Predator population dynamics in the "consumer" link demonstrated that the rotifers that consume two algal species are more competitive compared to protozoa feeding on chlorella only. В© 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
Scopus
Найти похожие

16.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pisman T.I., Somova L.A.
Заглавие : Competition of the natural and manmade biotic cycles in the closed aquatic system
Колич.характеристики :5 с
Место публикации : SPACE LIFE SCIENCES: CLOSED ARTIFICIAL ECOSYSTEMS AND LIFE SUPPORT SYSTEMS. Ser. ADVANCES IN SPACE RESEARCH: PERGAMON-ELSEVIER SCIENCE LTD, 2003. - Vol. 31: Meeting of F4 1 Session of the 34th Scientific Assembly of COSPAR (OCT, 2002, HOUSTON, TEXAS), Is. 7. - P1757-1761. - ISBN 0273-1177, DOI 10.1016/S0273-1177(03)00117-0
Примечания : Cited References: 10
Аннотация: This study addresses competition between the Paramecium bursaria and zoochlorella - endosymbiosis and the infusoria Paramecium caudatum in a closed aquatic system. The system is a natural model of a simple biotic cycle. P. bursaria consumes glucose and oxygen released by its zoochlorella and releases nitrogenous compounds and carbon dioxide necessary for algal photosynthesis. P. caudatum was fed on bacteria. It was shown that the infusoria P. bursaria united in one cycle with Chlorella had a higher competitive ability than P. caudatum. With any initial percentage of the infusoria in the mixed culture, the end portion of P. bursaria reached 90 - 99%, which was significantly higher than the end portion of the P. caudatum population. It is assumed that the sustenance expenditures of P. caudatum were greater than those of the endosymbiotic paramecium, i.e. the closing of the components into a biotic cycle leads to a decrease in sustenance expenditures. (C) 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
WOS
Найти похожие

17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pisman T.I., Somova L.A.
Заглавие : Competition of the natural and manmade biotic cycles in the closed aquatic system
Место публикации : Advances in Space Research. - 2003. - Vol. 31, Is. 7. - С. 1757-1761. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(03)00117-0
Ключевые слова (''Своб.индексиров.''): carbon dioxide--glucose--nitrogen compounds--oxygen--biotic cycle--space research--carbon dioxide--nitrogen--aquatic ecosystem--biosphere--competition (ecology)--endosymbiont--animal--article--bacterium--chlorella--comparative study--culture medium--food chain--growth, development and aging--metabolism--microbiology--microclimate--paramecium--photosynthesis--physiology--symbiosis--time--animals--bacteria--carbon dioxide--chlorella--culture media--ecological systems, closed--food chain--nitrogen--paramecium--photosynthesis--symbiosis--time factors--water microbiology
Аннотация: This study addresses competition between the Paramecium bursaria and zoochlorella - endosymbiosis and the infusoria Paramecium caudatum in a closed aquatic system. The system is a natural model of a simple biotic cycle. P. bursaria consumes glucose and oxygen released by its zoochlorella and releases nitrogenous compounds and carbon dioxide necessary for algal photosynthesis. P. caudatum was fed on bacteria. It was shown that the infusoria P. bursaria united in one cycle with Chlorella had a higher competitive ability than P. caudatum. With any initial percentage of the infusoria in the mixed culture, the end portion of P. bursaria reached 90 - 99%, which was significantly higher than the end portion of the P. caudatum population. It is assumed that the sustenance expenditures of P. caudatum were greater than those of the endosymbiotic paramecium, i.e. the closing of the components into a biotic cycle leads to a decrease in sustenance expenditures. В© 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
Scopus
Найти похожие

18.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Kokova V.E., Spitskaya N.I.
Заглавие : CONTINUOUS CULTIVATION OF SOME WATER INVERTEBRATES
Место публикации :. - 1984. - Third European Congress on Biotechnology., Munich, W Ger) Conference code: 6973. - P539-543
Ключевые слова (''Своб.индексиров.''): marine biology--artificial ecological systems--continuous cultivation--population growth rate--range conditions--suspended nutrients--water invertebrates--ecology
Аннотация: Continuous cultivation of water invertebrates facilitates the study of their biological characteristics and productivity and hence contributes to creation of artifical ecological systems. When applying the technique, suspended nutrients are being passed through the cultivator and culture is outflowing continuously, with the volume inside the vessel being constant. The objective of the study is to examine the effect of a range conditions of cultivating on population growth rate.
Scopus
Найти похожие

19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Khromechek E.B., Barkhatov Y.V., Rogozin D.Y.
Заглавие : Densities and distribution of flagellates and ciliates in the chemocline of saline, meromictic Lake Shunet (Siberia, Russia)
Место публикации : Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - С. 497-511. - ISSN 13862588 (ISSN) , DOI 10.1007/s10452-010-9332-x
Ключевые слова (''Своб.индексиров.''): chemocline--ciliate--cryptomonas--deep chlorophyll maximum--diel vertical migrations--meromictic lakes--anoxic conditions--bacterium--biomass--chlorophyll--ciliate--diel migration--flagellate--meromictic lake--population density--saline lake--seasonal variation--vertical distribution--zooplankton--khakassia--lake shunet--russian federation--siberia--bacteria (microorganisms)--ciliophora--cryptomonas--hypotrichia--mastigophora (flagellates)--oligotrichia--phytomastigophorea--prostomatida--scuticociliatia
Аннотация: The vertical and seasonal distributions of the phytoflagellate Cryptomonas spp., and its most common, the planktonic ciliate predators (Oligotrichida, Scuticociliatida, Hypotrichida and Prostomatida) were investigated in chemocline region of small saline, meromictic lake Shunet (Siberia, Russia) during 2003 and 2005. The lake has a pronounced chemocline, with abundance of purple and green sulphur bacteria. Vertical distribution of the Cryptomonas populations near the oxic/anoxic boundary layer was studied at close intervals in water sampled using a hydraulically operated thin-layer sampler. In both summer and winter, Cryptomonas peaked in water stratum 5-10 cm above anoxic zone or in the anoxic zone water column in the chemocline (about 5 m). Ciliate densities and biomass were also much higher in chemocline than in mixolimnion. The range of diurnal migration of Cryptomonas population was not very wide, and it was restricted to layers with high light intensity. The ciliates were sometimes detected above the upper border of the anoxic zone but also several centimetres below this zone. В© 2010 Springer Science+Business Media B.V.
Scopus
Найти похожие

20.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Zadereev Y.S., Gubanov V.G.
Заглавие : Density dependent regulation of the reproduction cycle of Moina macrocopa (Cladocera)
Колич.характеристики :7 с
Место публикации : BIODIVERSITY CRISIS AND CRUSTACEA. Ser. CRUSTACEAN ISSUES: A A BALKEMA PUBLISHERS, 2000. - Vol. 12: 4th International Crustacean Congress (JUL 20-24, 1998, AMSTERDAM, NETHERLANDS). - С. 535-541. - ISBN 0168-6356. - ISBN 90-5410-478-3
Примечания : Cited References: 19
Предметные рубрики: DAPHNIA-PULEX
ZOOPLANKTON
MAGNA
Аннотация: The allelopathic effect of population density on gametogenesis induction of Moina macrocopa (Crustacea: Cladocera) was investigated at varying food concentration, photoperiod, and temperature. The presence of the non-trophic effect of population density on gametogenesis induction was demonstrated. The experiments with single females have shown that if the photoperiod, temperature, and food concentration are favorable for parthenogenesis, the crowding water has the effect of stimulating females into changing the reproduction mode. This effect was enhanced by using a higher density of the population to achieve crowding. The change of reproduction mode occurs in the experiments with populations of M. macrocopa with the achievement of food availability favorable for the parthenogenesis of single females. Chemical interactions between animals are the most obvious explanation for the obtained results.
Найти похожие