Results of a comprehensive study of water bioresources of lake Senezh

2020 ◽  
pp. 6-17
Author(s):  
A. I. Nikitenko ◽  
D. V. Goryachev ◽  
N. N. Klets ◽  
A. V. Zdrok ◽  
S. S. Uscova ◽  
...  
Keyword(s):  
Fish Species ◽  
Size Structure ◽  
Fish Farming ◽  
Water Bodies ◽  
Water Object ◽  
Lake Zone ◽  
Good Reproduction ◽  
High Level ◽  
Fish Farming Water ◽  
The Given

In the paper, preliminary results of hydrochemical, hydrobiological, parasitological and ichthyological investigations have been given, carried out on waters of the Lake Senezh in 2020 and compared with analogous works for 2004–2006. The ecosystem of the given water object is extremely understudied. In the size structure of fish species, caught in 2020, dynamics of a good reproduction potential could be noted. The condition factor of all fish species is very high. One can see a significant prevalence of females over males, excepting bream, in all fish groups studied. The water object investigated showed the 2,8 times MPC increase for iron in fish farming water bodies. Concentration of toxic elements in water samples and bottom sediments did not increase MPC for all other indices. The bacteriological water analysis showed insignificant increase of bacterial contamination at the area of the investigation station 6 only, what is most likely of the anthropogenic nature and is being a result of the littoral lake zone pollution. Parasitological analysis of the Senezh lake fishes indicates of o high level of their invasion. 11 parasites species were found in 3 fish species investigated, which were represented by 73% of trematodes at the metacercaria and maritas stage. The fish ergasiles problem, existed in this water body since 2005 and up to-date, continues. In zanders gills, parasitic Ergasilus sieboldin were found. The given work would be interesting for investigators who will study the Senezh lake as well as other water bodies of the Moscow area.

Flattening of Affect and Personal Constructs

1970 ◽  
Vol 116 (530) ◽  
pp. 39-43 ◽  
Author(s):  
F. M. McPherson ◽  
Valerie Barden ◽  
A. Joan Hay ◽  
D. W. Johnstone ◽  
A. W. Kushner
Keyword(s):  
Emotional Expression ◽  
Emotional Response ◽  
Rater Agreement ◽  
Personal Constructs ◽  
Good Definition ◽  
Organic Psychoses ◽  
Tone Of Voice ◽  
High Level ◽  
The Given ◽  
Affective Flattening

Affective flattening is a disorder of emotional expression, of which a good definition is ‘a gross lack of emotional response to the given situation’ (Fish, 1962). It is a clinical sign whose assessment depends upon the clinician's intepretation of the patient's facial expression, tone of voice and content of talk (Harris ' Metcalfe, 1956). Although these are subtle cues, it has been shown that experienced clinicians can assess the severity of affective flattening with a high level of inter-rater agreement (Miller et al., 1953; Harris ' Metcaife, 1956; Wing, 1961; Dixon, 1968). The disorder is usually associated with a diagnosis of schizophrenia, although it may occur in other conditions, such as the organic psychoses (Bullock et al., 1951).

Periphyton dry mass, ash content, and chlorophyll content on natural substrata in three water bodies of different trophy

2011 ◽  
Vol 40 (4) ◽  
Author(s):  
Małgorzata Romanów ◽  
Zbigniew Witek
Keyword(s):  
Aquatic Vegetation ◽  
Eutrophic Lake ◽  
Dry Mass ◽  
Ash Content ◽  
Soft Water ◽  
Water Bodies ◽  
Szczecin Lagoon ◽  
Inorganic Matter ◽  
Colonization Period ◽  
High Level

AbstractPeriphyton communities were studied on several dominating macrophytes, Phragmites australis, Potamogeton lucens, and Nuphar lutea, in three different types of lakes. In soft-water mesotrophic Lake Mały Borek and in shallow, eutrophic Lake Gardno samples were collected about once every two months from April to November 2009. In eutrophic Szczecin Lagoon (the estuary of the Oder River), samples were only collected once in July. The aim of this paper was to determine the dry mass, the ash content, and the chlorophyll-a content of periphyton on a natural substratum, in order to determine the mass, the inorganicorganic status of periphyton, and the auto-heterotrophic character of this complex. The analyzed periphytic communities exhibited low dry mass at the beginning of the growth season, which increased with colonization period on the aquatic vegetation. The highest (but still low) values were achieved in autumn, which persisted, with small loss, until spring of the subsequent year. The differences in dry mass between each type of lake were small, but in the strongly eutrophic Szczecin Lagoon this index was slightly higher than in the other two water bodies. The highest dry mass was noted for periphyton dominated by Cordylophora caspia colonies overgrowing common reeds and for periphyton on Potamogeton lucens in Szczecin Lagoon. In shallow water bodies, such as Lake Gardno and Szczecin Lagoon, wind causes strong resuspension of sediments. This can explain the relatively high level of inorganic matter in dry mass of the periphyton in both water bodies. However, the small ash content in periphyton in Mały Borek may result from the soft-water character of this lake. The hetero-autotrophic status of the periphytic community prevailed throughout the study period in Gardno and Mały Borek lakes. The auto-heterotrophic status of periphyton was noted only in short periods of time in each lake.

scholarly journals A Runtime System for XML Transformations in Java

2004 ◽  
Vol 11 (33) ◽  
Author(s):  
Aske Simon Christensen ◽  
Christian Kirkegaard ◽  
Anders Møller
Keyword(s):  
Static Analysis ◽  
Programming Language ◽  
Program Analysis ◽  
Companion Paper ◽  
General Purpose ◽  
Runtime System ◽  
Xml Documents ◽  
Level Data ◽  
High Level ◽  
The Given

We show that it is possible to extend a general-purpose programming language with a convenient high-level data-type for manipulating XML documents while permitting (1) precise static analysis for guaranteeing validity of the constructed XML documents relative to the given DTD schemas, and (2) a runtime system where the operations can be performed efficiently. The system, named Xact, is based on a notion of immutable XML templates and uses XPath for deconstructing documents. A companion paper presents the program analysis; this paper focuses on the efficient runtime representation.

scholarly journals The importance of sanitary microbiological indices in the evaluation of epidemiological safety of water use in conditions of chemical contamination of water

2019 ◽  
Vol 95 (10) ◽  
pp. 934-938 ◽  
Author(s):  
Yu. A. Rakhmanin ◽  
L. V. Ivanova ◽  
T. Z. Artemova ◽  
E. K. Gipp ◽  
Anzhelika V. Zagainova ◽  
...  
Keyword(s):  
Water Use ◽  
Inhibitory Effect ◽  
Biological Properties ◽  
Chemical Substance ◽  
Water Bodies ◽  
Chemical Pollution ◽  
Chemical Contamination ◽  
Natural Conditions ◽  
The Impact ◽  
The Given

The increasing chemicalization of production and life leads to the pollution of water bodies by chemicals, the effect of which on the micro - and macro - organisms is poorly understood. This section of the study in sanitary bacteriology is becoming ever more topical and is an important task of modern hygienic science. One of complicacies of the study of the problem is related with the fact that the presence of only experimental data fails to be sufficient, as the impact of any given chemical substance on different bacteria in the experiment does not mean that under natural conditions, similar results will be obtained. One reason for this may be the inhibitory effect of the given chemical on biological properties of bacteria, while in field conditions in the water several chemicals interacting with each other can exist. In this regard, the aim of the work was to assess the indicator value of sanitary and microbiological indices of epidemic hazard of water use in conditions of chemical pollution of surface water bodies.

scholarly journals SIZE STRUCTURE OF PHYTOPOPULATIONS AND ITS QUANTITATIVE EVALUATION

2016 ◽  
Vol 1 ◽  
pp. 9-15
Author(s):  
Victoria Skliar ◽  
Maryna Sherstuk
Keyword(s):  
Pinus Sylvestris ◽  
Quantitative Evaluation ◽  
Size Structure ◽  
Size Classes ◽  
Ledum Palustre ◽  
Forest Phytocenoses ◽  
Index Index ◽  
High Level ◽  
Original Approach

There was elucidated the original approach to the evaluation of phytopopulation size structure. For its characteristics it was offered to use the special index - index diversity of size structure (ІDSS). There are presented methods and algorithm of its determination. There was demonstrated that index diversity of size structure can be used at populational studies of species that belong to the different living forms. Especially phanerophytes (Pinus sylvestris) and hamephytes (Ledum palustre). As to Pinus sylvestris and Ledum palustre with help of index diversity of size structure was objectively proved that its cohorts and ontogenetic groups that growth in composition of forest phytocenoses typical for Ukrainian Polissya are not characterized with high level diversity of size structure. The value of index diversity of size structure is mainly less than 20 %. In phytopopulation the specific and phytocenotic peculiarity is demonstrated by diversity of size structure and also by representation of plants of certain size classes.

scholarly journals Modern composition and distribution of alien fish species in the water bodies of the Krasnoyarsk Territory

2016 ◽  
Vol 7 (4) ◽  
pp. 324-332 ◽  
Author(s):  
I. V. Zuev ◽  
A. A. Vyshegorodtsev ◽  
S. M. Chuprov ◽  
D. V. Zlotnik
Keyword(s):  
Fish Species ◽  
Water Bodies ◽  
Alien Fish ◽  
Alien Fish Species

Polyculture in fish farming as a method of preventing fish diseases

2021 ◽  
pp. 30-40
Author(s):  
Grigory Emelyanovich Servetnik
Keyword(s):  
Fish Species ◽  
Fish Habitat ◽  
Fish Farming ◽  
Natural Food ◽  
Total Biomass ◽  
Fish Farms ◽  
Fish Diseases ◽  
Host Body ◽  
Contagious Diseases

Methods of prevention of fish diseases are aimed at destroying parasites in the host body and in the fish habitat — in the reservoir (chemoprophylaxis, increasing fish resistance), at preventing parasites from entering the reservoir (limiting the import of fish, import of healthy fish, quarantine measures, etc.), as well as preventing their spread and entry into the host body. It is shown that polyculture is not only the most effective method of using the natural forage base of the reservoir and, as a result, increasing fish productivity, but also a means of preventing mass infectious and other fish diseases. To prevent mass infectious diseases of fish and death from them both in safe and unfavorable ponds of carp fish farms, it is advisable to grow other fish species together with carp that do not suffer from diseases peculiar to carp. As a result, so-called sparse species plantings of fish are created in the ponds, while the total biomass remains high. At the same time, the natural food supply of ponds is most fully used and a kind of biological buffer is created that prevents the emergence and spread of contagious diseases. Polyculture can play a particularly important role in pond farms that already have certain problems with rubella, filometroidosis, botryocephalosis, carp pox, etc. Long-term studies of breeding herds in pond farms have shown that most of them have single foci of diseases, which, if there are optimal conditions for the pathogen, are ready to immediately respond with an outbreak of the disease or are generally quarantined for a particular fish disease. When determining the objects of polyculture, it is necessary to reduce the proportion of fish species that have a significant number of common diseases.

scholarly journals Fish Diversity of River Siyom of Arunachal Pradesh India: A Case Study

Our Nature ◽  
1970 ◽  
Vol 8 (1) ◽  
pp. 164-169
Author(s):  
K. Bagra ◽  
D.N. Das
Keyword(s):  
Fish Species ◽  
Water Bodies ◽  
Anthropogenic Factors ◽  
Fish Diversity ◽  
Arunachal Pradesh ◽  
Fishery Resources ◽  
The Status ◽  
Social Restriction ◽  
Destructive Fishing

Arunachal Pradesh being rich in fishery resources biophysically, the status of the fish diversity is not known from all the water bodies. A case study was undertaken in the river Siyom (28°11′25′′-28°10′52′′N and 94°45′17′′-97°47′51′′E) of West Siang district, Arunachal Pradesh from 2002 to 2004 with the fragmentary work till 2007. For the purpose, sampling of fish was done from the river time to time using local contraption along with modern nets. A total of 44 species of fishes belongs to 9 families were identified. Fishes of family Cyprinidae were found to be dominant followed by Balitoridae. Some of the fish species were found very rare in the river, which may be due to various anthropogenic factors. Therefore, in addition to social restriction on community fishing some awareness measures need to be taken to prevent the destructive fishing activities in the river.DOI: 10.3126/on.v8i1.4324

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