mass reproduction
Recently Published Documents


TOTAL DOCUMENTS

74
(FIVE YEARS 44)

H-INDEX

5
(FIVE YEARS 1)

2021 ◽  
Vol 24 (7) ◽  
pp. 20-29
Author(s):  
Anatoliy Paliy ◽  
Andrii Palii ◽  
Kateryna Rodionova ◽  
Zhanna Koreneva ◽  
Volodymyr Kushnir

The biology and ecology of parasitic insects are closely related to the life of people, and the leading role belongs to animal husbandry. It is difficult to overestimate the negative influence of parasitic dipterans on productive animals, especially during the season of their mass reproduction and distribution. The work aimed to study the species composition of Diptera in different livestock biocenoses in eastern and central Ukraine. Entomological nets and traps were used to capture zoophilic flies, the number of insects was determined using the fly index, and luminescent markers TAT 33 with a powder fraction of 30 microns. The collected insects were identified according to the existing modern identifiers. As a result of the studies, the presence of Musca domestica (Linnaeus, 1758) was determined in all livestock facilities for keeping animals and birds. The largest number of house flies was noted in the facilities for keeping sows with suckling pigs (312.0±35.3) and fattening animals (277.5±6.1). M. domestica, M. autumnalis, and S. calcitrans accounted for 75.57% of the entire complex of zoophilic flies. The species M. vitripennis, M. tempestiva, L. irritans, H. atripalpis also occupied an important place among the species that form the entomoparasitocenosis (18.91%). In pasture biotopes, two species of flies (Ortellia caesarion Meigen and Ortellia cornicina Fabr.) have been identified. They do not attack animals, but are mineralisers of cattle feces. Luminiferous marker L-1 basic green (TAT 33) fixes well on insects and lasts for 5 days. The density of the fly population in the pig houses is 36% higher than in the calf houses. The results obtained are the basis for the development of innovative, scientifically grounded schemes for control and the fight against parasitic insects at livestock enterprises


2021 ◽  
Vol 6 (4(17)) ◽  
pp. 141-168
Author(s):  
Senadin Musabegović

The text problematizes the connection between art and the power of technology. The question arises: how can photography as an art, created as a technical invention, respond to the challenges of technical power, which manifests itself as an unconditional desire for domination that knows no limits? The esthetician from Sarajevo, Sadudin Musabegović, understood the very power of photographic representation precisely through the figures of division: mimesis - poiesis - techne. Martin Heidegger's opinion on technique is connected with the figure offered by Musabegović. Sadudin Musabegović's aesthetic thought provides possible answers to the question: how is a man present in photography itself when the famous film critic Andre Bazin said that photography is the only art we enjoy because of an absence of a human? And what role does art play in overcoming the crisis established by technology in the modern world? In the 'age of mass reproduction', art itself has lost its aura, as Walter Benjamin states, and Musabegović adds that even the photographed being has lost its aura. The problem of losing the aura can also be understood as a new beginning, as a ‘new source’ for art itself. But for the source itself, Musabegović says that he finds himself in the flow, that he is always outside himself, he is in the intertwining, permeation that manifests itself in a dynamic, reversible, and moving figure: mimetic activity – making techne – productive poiesis. This text aims not only to explain the meaning of this figure, which Musabegović established originally within aesthetics, and especially in the field of photography and film, but also to analyze its meaning in the context of unmasking the logic of modern technical control, which marked a modern way of living, thinking, and perceiving the world.


Plants ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 6
Author(s):  
Gennadii V. Khodakov ◽  
Lavr A. Kryukov ◽  
Einat Shemesh-Mayer ◽  
Rina Kamenetsky-Goldstein

Lemon wormwood Artemisia balchanorum was recently introduced to southern Russia as a new aromatic plant. Based on biological and chemical characteristics, several populations with dominant citral, linalool, and geraniol production were selected for further development and maintained by seed propagation. Chemical analysis of five outstanding populations at three stages of annual development: vegetative, flower buds, and full flowering, confirmed that the seed populations retain the distinct dynamics of the dominant and minor components during the annual cycle and can be used for the commercial production of citral, linalool, and geraniol. Micropropagation in vitro allows for efficient clonal micropropagation and mass reproduction of elite cultivars and promising forms of A. balchanorum on a commercial scale but cannot serve as a source of direct and efficient production of secondary metabolites.


2021 ◽  
Vol 6 (6) ◽  
pp. 89-97
Author(s):  
A.A. Sobolev ◽  
◽  
U.S. Shipinskaya ◽  

The data on the ipid bark beetle population growth in pine plantations of Central Russia in 2020 was recorded. The formation of favorable weather conditions for the development of this depredator in some regions was recorded, which greatly influenced the successful development of the insect population in plantations, in particular in the Pskov, Vladimir, Moscow, Bryansk, Lipetsk, and Ryazan regions. In some areas, a medium and low spread of the bark beetle was revealed. The influence of meteorological conditions on the flight activity of the insect and the probability of the mass reproduction foci formation under the 2020 weather conditions were analyzed. The results of the study formed the basis for the forecast preparation of the sanitary and forest health state. It is recommended to use the materials of the article to determine the optimal period for carrying out measures to protect pine plantations from the ipid bark beetle.


2021 ◽  
Vol 937 (3) ◽  
pp. 032110
Author(s):  
D M Surinsky ◽  
I V Savchuk

Abstract The problem of scaring away birds was born in ancient times and remains relevant to this day. Birds tend to places where they are comfortable and stay there. Therefore, to achieve maximum effect, new and effective designs of electric bird repellers are needed. Currently, the territories of cities and their outskirts serve as a habitat not only for people and domestic animals, they are also a habitat for numerous species of wild birds. In the settlements and in their vicinity, a specific fauna of birds has formed. Its main features are a limited number of species and a large number of individuals. This is due to the fact that few bird species were able to adapt to the specific living conditions in the city. However, those who were able to adapt found in the city a favorable environment for rapid and mass reproduction. The number of synanthropic birds in large cities reaches tens and hundreds of thousands of individuals [2]. Synanthropic birds are wild birds that constantly live in the vicinity of humans or have found favorable nesting conditions in the territory of settlements and their environs. Many spheres of life of synanthropic birds are directly related to human activities, since the food of synanthropic birds is anthropogenic in nature, because their diet usually includes seeds of cultivated plants and all kinds of food waste [3]. In each region, different species of birds prevail, but there are patterns that are characteristic of the entire territory of Russia. Almost everywhere, the main representatives of the synanthropic are house sparrows and doves. In the central part of the country, you can safely add the hooded crow to this list. When moving towards the west, the number of crows decreases markedly.


Author(s):  
A. G. Kojevnikova ◽  

The article presents materials on the study of the cicadas Laodelphax striatellus Fall. and Muirodelphax aubei Perr.in the Fergana Valley, their morphological and biological characteristics, systematic position, distribution, harmfulness, food connections and peculiarities of their diagnosis. As I.D. Mityaev points out [1], the useful value of cicadas for humans is very insignificant. There is evidence that some peoples eat large singing cicadas, considering them medicinal, or keep cicadas in cages for the sake of their peculiar singing. It is proved that some species of cicadas, in places of their mass reproduction, play a significant role in the permeability of moisture and aeration of the soil, the underground work of their larvae. Larvae and imago of cicadas are a source of food for many animals and they play a certain role in biocenoses. Some species, due to their low abundance and low harmfulness, are not of great practical importance for humans. Most of the cicadas are pests of various agricultural plants [2, pp. 146-150]. As noted by D.A. Azimov, without deep knowledge of the fauna and development of the taxonomy of insects, as well as other groups of fauna and vegetation, it is impossible to solve further problems of protection and rational use of useful forms, as well as organization of plant protection [3, pp. 54-55]. Therefore, the study of cicadas and their diagnosis is not only theoretical, but also practical.


Author(s):  
T. S. Rybareva

In the last decade, the acarocomplex of apple orchards in the plain-steppe zone of the Crimea was dominated by two species of mites, fam. Tetranychidae - Amphitetranychus viennensis (Zacher) and Panonychus ulmi (Koch). Their share in the complex of phytophagous mites was 52.5 and 32.0%, respectively. Against the background of repeated acaricidal treatments during the season, the emergence of resistant races of phytophagous mites was recorded. The proposed anti-resistant strategy for controlling the number of spider mites on an apple tree involves the use of Phytoseiulus persimilis (Athias-Henriot), Neoseiulus californicus (McGregor), and Amblyseius andersoni (Chant). The combination of methods of seasonal colonization by phytoseiids serves as the building blocks of an anti-resistant defense system.Resettlement in the spring, by flooding, of two species of acariphages, P. persimilis and A. andersoni , contributes to the formation of acarofauna, so that while the first species reduces the number of phytophagous mites (by 50-60%), the second adapts and starts feeding later, and, at the expense of daughter individuals, it allows to reduce the number of pests by the end of the second decade of June to 2-3 individuals / leaf. In summer, a double release of the predatory mite N. californicus with a norm of 30 thousand individuals / ha (150-300 individuals / every 10 trees) reduces the risk of mass reproduction of spider mites at high average daily temperatures and low humidity.


2021 ◽  
Vol 6 (1-2) ◽  
pp. 114-153
Author(s):  
Jessica Vantine Birkenholtz

Abstract In late nineteenth-century Nepal, the advent of print and mass reproduction marked a critical and as yet understudied junction in Nepal’s literary history and attendant manuscript and print cultures. This article employs Nepal’s popular Svasthānīvratakathā to illuminate key shifts and intersections between language of composition, technologies of writing, places of composition or reproduction, and the agents of transmission that are emblematic of local manuscript practices and paradigmatic of the emergent print culture in late nineteenth- and early twentieth-century Nepal. The practices and actors involved in Svasthānī transmission shifted the text away from the private, domestic sphere to the public, translocal realm on multiple levels. Attending to these shifts as evidenced in one living devotional tradition indexes significant developments and intersections that deepen our knowledge of the changing linguistic, technological, geocultural, and socioeconomic aspects of the literary landscape in Nepal and South Asia more broadly.


2021 ◽  
Vol 14 (3) ◽  
pp. 39-45
Author(s):  
L.A. Koldar ◽  

Development of effective technology of rare and endangered plant species mass reproduction in vitro is one of the urgent nowadays tasks. Diantus hypanicus Andrz. of the Caryophyllaceae Juss. family belongs to this group of plants. It is an endemic, narrow-localized species listed in the Red Book of Ukraine, the European Red List and the Annex to the Berne Convention. Prospects for the conservation of this species are associated with the study of its viability and require the development of effective reproduction methods. Aim. The purpose of the experiment was to determine the effect of different growth regulators concentrations on the D. hypanicus explants regenerative capacity during in vitro propagation. Methods. For the experiment the seed were used collected from plants of natural habitats and sown on a hormone-free nutrient medium according to the recipe of Murashige and Skoog. For 12–15 days, 4–6 cm long seedlings were obtained which were transferred to nutrient media modified with the content of growth-regulating substances: BAP 0.5–2.0 mg / l, IBA 0.01 mg / l and IAA 0.1 mg / l. Results. Initiation of adventitious buds with subsequent shoot formation was observed for 12–16 days. Each variant plants differed in number, growth activity and intensity, morphometric parameters. After 35–40 days from the explant introduction, conglomerates with well-developed leafy shoots were formed. It was found that, when modifying nutrient media with growth regulators BAP, IBA, IAA of different concentrations, D. hypanicus explants were actively undergoing regeneration processes of different intensity. Conclusions. It was proved that high ability to regenerate was the characteristic of explants cultured on a nutrient medium modified by the addition of BAP – 0.5 mg / l and IAA – 0.1 mg / l, where, on average, 18 ± 0.24 shoots of 2.42 ± 0.17 cm long were formed with a net reproduction of 19.06 ± 0.14. Shoots with 3.0–5.0 pairs of leaves that reached 3.5–6.0 cm were selected and transferred to nutrient media for rooting. Less developed shoots were planted on nutrient media for further reproduction. The next stage of the study is aimed at modifying nutrient media to achieve explants rhizogenesis and obtain a large number of plants necessary for the preservation of this endemic narrow-localized species in culture with subsequent repatriation to natural places of growth.


Author(s):  
Stuart Poyntz

The history of youth and media culture can be examined by tracing the relationships between the production, representation, circulation, and consumption of media, technology, and cultural texts aimed at youth markets and audiences. The historical development of youth relates to larger socioeconomic, cultural, and political conditions, including the role of mass reproduction and changes in the conditions of distance that shape youth lives. Youth and mass media first melded together in the West, owing to developments in the United States and the United Kingdom. The histories of media and youth culture in other countries, however, capture differences in youth media relationships. In the contemporary period, the use of YouTube in the West and WeChat in China illuminates the globalization of youth cultures and the ongoing role of a central paradox integral to young people’s entanglements with media around the world: the key media structures that shape and contour youth lives are also the very sites where youth continue to navigate authentic meaning and experience and imagine their own futures.


Sign in / Sign up

Export Citation Format

Share Document