scholarly journals Nutrition Physiology of Juveniles Individuals of Pumpkinseed Lepomis gibbosus (Linnaeus, 1758) from the Samara Bay (Ukraine)

2021 ◽  
Vol 83 ◽  
pp. 15-21
Author(s):  
O.S. Nesterenko ◽  
Oleg M. Marenkov ◽  
Ye.S. Pylypenko

The article presents the results of studies physiology of nutrition of juveniles individuals of pumpkinseed Lepomis gibbosus (Linnaeus, 1758) from the Zaporizhzhia (Dnipro) reservoir. histological structure, morphometric parameters of digestive system and nutrition biology were investigated. The material for work were collected during scientific research in June-July 2016–2017. The ichthyological sampling was carried out in the Samara Bay of the Zaporizhzhia (Dnipro) reservoir. Researches of structure of digestive system were conducted using histological methods, researches of nutrition were conducted using ichthyological and hydrobiological methods The height of the intestinal epithelium of the pumpkinseed`s juveniles varies from 15.5 microns to 51.9 microns and on average is 32.59 ± 9.03 microns, the area of secretory goblet cells of the intestine reaches 198.61 ± 36.55 μm2. It was revealed that the pumkinseed’s juveniles only feed on phytoplankton. Research results can be useful for further study on the fish nutrition, especially sexual matured. Also, nutrition studies can help to find biomeliorative methods to combat the pumpkinseed, because the species is in competition with industrially valuable species of fish for fodder.

Author(s):  
Alexei L. Nikiforov-Nikishin ◽  
Dimitri L. Nikiforov-Nikishin ◽  
Nikita I. Kochetkov ◽  
Svetlana V. Smorodinskaya ◽  
Victor A. Klimov

This paper studies the influence of three probiotic preparations of various microbiological composition: Bacillus subtilis (O1); Bacillus subtilis + Bacillus amyloliquefaciens (O2); Lactobacil-lus acidophilus (O3) on the growth process and histological structure of the organs of the gastroin-testinal tract of juvenile Oncorhynchus mykiss by morphometric parameters. The effect of the pro-biotic preparations led to the increase in fish growth and influenced different sections of the gastro-intestinal tract. The biggest change was found in the mid intestine and the reliable difference com-pared to the control was obtained at the following parameters: Lamina propria width, intraepithe-lial lymphocytes number of prismatic epithelium and goblet cells area. The changes in the pyloric appendages were less obvious but reported as playing an important functional role. The liver pre-served normal functional structure in all series of the experiment except for the probiotic group Lactobacillus acidophilus, where hepatocyte small-drop vacuolization was observed. That might be connected with the change of the digest activity resulting from a decrease in secretory activity of the intestinal exocrinocytes. The use of all the probiotic preparations led to the similar change in morphometric parameters, in all the groups it was possible to decrease the immune response.


2018 ◽  
Vol 35 ◽  
pp. 1-9 ◽  
Author(s):  
Hameeda Kalhoro ◽  
Shengli Tong ◽  
Lei Wang ◽  
Ying Hua ◽  
Josie Ancella Volatiana ◽  
...  

The present study aimed to investigate the macroscopic and histological structure of the gastrointestinal tract (GIT) of Larimichthyscrocea (Richardson, 1846). It consists of esophagus, stomach regions, pyloric caeca, intestinal regions, and rectum. Sixteen tubular light yellowish pyloric caeca of similar sizes were observed in all individuals. The digestive wall consists of mucosa, submucosa, muscularis, and adventitia. No major differences appeared in the structure of the tunica, epithelial cell types, connective tissues and musculature glands of L.crocea GIT. The mucosal epithelia in the oesophagus has longitudinal branched folds with frontward and hindmost zones. The gastric tunica mucosa has a characteristic folded structure and can be divided into three regions. The intestinal tunica mucosa is characterized by villi structures and numerous mucus-secreting cells. Mucus-secreting goblet cells were strongly positive to AB at pH 2.5 in the oesophagus (excluding gastro-oesophageal junction) and intestine mucosal regions, which indicates an abundance of carboxylate mucins. The surface epithelia of the gastric mucosa is PAS-positive and AB-negative. SEM examination revealed that cells in the epithelium of the esophagus have an unbroken apical layer and goblet cells. The intestinal coefficient (IC) of L.crocea was 0.80 ± 0.21, consistent with a carnivorous or omnivorous habit. Our study adds the knowledge of the digestive system of L.crocea and might be useful in the management of L.crocea stocks.


Nanoscale ◽  
2021 ◽  
Author(s):  
Xijiao Mu ◽  
Li Hu ◽  
Yuqing Cheng ◽  
Yurui Fang ◽  
Mengtao Sun

In this review, the development context and scientific research results of chiral surface plasmons (SPs) in recent years are classified and described in detail.


2006 ◽  
Vol 14 (4) ◽  
pp. 321-349 ◽  
Author(s):  
Diana Reiss ◽  
Jessica Sickler ◽  
Sarah Gruber ◽  
Paul Boyle ◽  
Elizabeth Elliott ◽  
...  

AbstractThis review of how dolphins are portrayed in popular media (including literature, film, television, and music) reveals four themes that may influence public acceptance of current scientific research into dolphin cognition. These themes are: (a) dolphin as peer to humans, of equal intelligence or at least capable of communicating with or helping humans; (b) the dolphin as the representation of a romantic notion of ideal freedom in nature, embodying principles of peace, harmony or love; (c) the dolphin as a naïve, innocent being that is subordinate and in need of human protection; and (d) the dolphin as superior to humans, potentially affiliating with a higher power or intelligence. This review revealed that the use of dolphins in humor reinforced or lampooned the four identified themes, indicating a common acceptance of these themes. The paper concludes with a discussion of the importance of considering popular narratives in the presentation of scientific research results.


2013 ◽  
Vol 40 (2) ◽  
pp. 293-383 ◽  
Author(s):  
Katica Hedrih-Stevanovic

A review, in subjective choice, of author?s scientific results in area of: classical mechanics, analytical mechanics of discrete hereditary systems, analytical mechanics of discrete fractional order system vibrations, elastodynamics, nonlinear dynamics and hybrid system dynamics is presented. Main original author?s results were presented through the mathematical methods of mechanics with examples of applications for solving problems of mechanical real system dynamics abstracted to the theoretical models of mechanical discrete or continuum systems, as well as hybrid systems. Paper, also, presents serries of methods and scientific results authored by professors Mitropolyski, Andjelic and Raskovic, as well as author?s of this paper original scientific research results obtained by methods of her professors. Vector method based on mass inertia moment vectors and corresponding deviational vector components for pole and oriented axis, defined in 1991 by K. Hedrih, is presented. Results in construction of analytical dynamics of hereditary discrete system obtained in collaboration with O. A. Gorosho are presented. Also, some selections of results author?s postgraduate students and doctorantes in area of nonlinear dynamics are presented. A list of scientific projects headed by author of this paper is presented with a list of doctoral dissertation and magister of sciences thesis which contain scientific research results obtained under the supervision by author of this paper or their fist doctoral candidates.


2021 ◽  
Vol 9 (5) ◽  
pp. 1141-1152
Author(s):  
Muazu Abdulwakil Auma ◽  
Eric Manzi ◽  
Jibril Aminu

Facial recognition is integral and essential in todays society, and the recognition of emotions based on facial expressions is already becoming more usual. This paper analytically provides an overview of the databases of video data of facial expressions and several approaches to recognizing emotions by facial expressions by including the three main image analysis stages, which are pre-processing, feature extraction, and classification. The paper presents approaches based on deep learning using deep neural networks and traditional means to recognizing human emotions based on visual facial features. The current results of some existing algorithms are presented. When reviewing scientific and technical literature, the focus was mainly on sources containing theoretical and research information of the methods under consideration and comparing traditional techniques and methods based on deep neural networks supported by experimental research. An analysis of scientific and technical literature describing methods and algorithms for analyzing and recognizing facial expressions and world scientific research results has shown that traditional methods of classifying facial expressions are inferior in speed and accuracy to artificial neural networks. This reviews main contributions provide a general understanding of modern approaches to facial expression recognition, which will allow new researchers to understand the main components and trends in facial expression recognition. A comparison of world scientific research results has shown that the combination of traditional approaches and approaches based on deep neural networks show better classification accuracy. However, the best classification methods are artificial neural networks.


Author(s):  
Svitlana NAKHOD ◽  

The article is devoted to clarifying the pe-culiarities of forming an inclusive educational environment in the Ukrainian education system and highlighting the strategies for its effective development by conducting a SWOT analysis. Theoretical methods of studying the study and analysis of philosophical, pedagogical and psychological literature were used to identify the state of the problem of formation of inclusive educational environ-ment in science, as well as its importance in the prepara-tion of students of social and pedagogical profile; synthe-sis, induction, deduction, generalization and systematiza-tion of existing scientific research results in order to de-termine the state of development of the problem and per-spective directions of its solution. Theoretical methods of studying the study and analy-sis of philosophical, pedagogical and psychological litera-ture were used to identify the state of the problem of formation of inclusive educational environment in science, as well as its importance in the preparation of students of social and pedagogical profile; synthesis, induction, de-duction, generalization and systematization of existing scientific research results in order to determine the state of development of the problem and perspective directions of its solution.It is established that SWOT analysis is a universal strategic planning technique aimed at finding the new opportunities and identifying the potential risks to effectively define the research object. Strengths of in-clusive educational environment are identified, such as implementation of democratic foundations of public order, existence of barrier-free physical and psychological envi-ronment, elimination of discriminatory manifestations and social stereotypes, emergence of new vectors of teachers’ professional development, cohesion of parental communi-ty, etc. Among the weaknesses are the substantive, func-tional and organizational aspects that determine the activities of socio-pedagogical profile. Possibilities of inclu-sive educational environment are discovered, which in-clude the preparation of social community for acceptance of people with special educational needs, emergence of experimental education institutions, mass media involve-ment in the work on formation of positive image of inclu-sive education, etc. The threats and obstacles to the for-mation of an effective inclusive educational environment are characterized, such as the lack of an adapted domes-tic model of the organization of inclusive education, the lack of a legal framework regulating all Based on the SWOT analysis, strategies for the effec-tive development of an inclusive educational environment were identified, for instance 1) a strategy of using strengths aimed at finding internal reserves, 2) a strategy of using strengths to overcome threats, 3) a strategy of using opportunities to overcome weaknesses, 4) a strate-gy for weakness elimination and threat prevention.It is emphasized that each of the identified strategies is im-plemented through the interaction between specialists of socio-pedagogical profile who are the subjects of inclusive education practice, whose level of professional training will significantly influence the problems of forming an effective inclusive education environment.


Author(s):  
N.N. Miklouho-Maclay ◽  

The article describes two scientific expeditions to the Maclay Coast (Madang region) in Papua New Guinea in the 21st century organized by the Russian non-profit organization Miklouho-Maclay Foundation for the Preservation of Ethnocultural Heritage with the participation of the scientists of the Russian Academy of Sciences from Moscow and St. Petersburg in the footsteps of great Russian scientist, humanitarian and ethnographer Nikolay Miklouho-Maclay. The article represents the first research results and outlines the prospects of cooperation in the scientific, cultural and humanitarian spheres.


2001 ◽  
Vol 61 (3) ◽  
pp. 517-522 ◽  
Author(s):  
M. L. MARTINS ◽  
F. R. de MORAES ◽  
R. Y. FUJIMOTO ◽  
E. M. ONAKA ◽  
C. I. F. QUINTANA

The present work studied the prevalence and histopathology of Neoechinorhynchus curemai Noronha, 1973 (Acanthocephala: Neoechinorhynchidae) from curimbatá, Prochilodus lineatus Valenciennes, 1836. Eighteen fishes with averages of 46.7 + 1.1 cm length and 1,674.8 + 75.6 g weight were collected with net, bimonthly from December 1995 thru December 1996 in the hydroelectric power station of Volta Grande Reservoir (Cemig), Minas Gerais, Brazil. From analysed fishes, 15 were infected with acanthocephalans in the intestine (prevalence 83.3%). The greatest mean intensity occurred in August 1996 with 66.5 (16 to 208) parasites. Histopathological analysis showed complete desquamation of the intestinal epithelium with severe hyperplasia and hypertrofia of the goblet cells. Severe inflammatory reaction at the submucosa, displacement of their sheaf, associated with oedema and mononuclear and eosinophilic infiltration were observed.


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