Spatial distribution of personality types in fallow deer can explain the adaptive coexistence of multiple personality types within animal populations

2011 ◽  
Author(s):  
U. A. Bergvall
Keyword(s):  
Spatial Distribution ◽  
Fallow Deer ◽  
Personality Types ◽  
Multiple Personality ◽  
Animal Populations

scholarly journals Structure Analysis of Hedgerows With Respect to Perennial Landscape Lines in Two Contrasting French Agricultural Landscapes

2019 ◽  
pp. 1278-1299
Author(s):  
Sébastien Da Silva ◽  
Florence Le Ber ◽  
Claire Lavigne
Keyword(s):  
Spatial Distribution ◽  
Structure Analysis ◽  
Landscape Heterogeneity ◽  
Agricultural Landscapes ◽  
Spatial Extent ◽  
Association Patterns ◽  
Landscape Elements ◽  
Animal Populations ◽  
Linear Landscape Elements

Characterizing the spatial distribution of hedgerows over landscapes is important for understanding the effects of this distribution on the dynamics of plant and animal populations. Because hedgerows are planted or managed, the authors hypothesized that their distribution depends on the presence of other linear landscape elements, namely, roads and channels. Using proximity analyses, the authors thus assessed how the spatial distribution of hedgerows was impacted by the position of these linear landscape elements and the spatial extent of this impact for two contrasting agricultural landscapes. The results indicate that hedgerows were generally associated at short distances with other elements (100-150 m). Hedgerows had different association patterns depending on their orientation in one of the two landscapes. In that same landscape, within-landscape heterogeneity was related to different association patterns. These results indicate that models of the spatial distribution of hedgerows would gain from being based on the location of roads and channels in the studied landscape.

scholarly journals Structure Analysis of Hedgerows with Respect to Perennial Landscape Lines in Two Contrasting French Agricultural Landscapes

2014 ◽  
Vol 5 (1) ◽  
pp. 19-37
Author(s):  
Sébastien Da Silva ◽  
Florence Le Ber ◽  
Claire Lavigne
Keyword(s):  
Spatial Distribution ◽  
Structure Analysis ◽  
Landscape Heterogeneity ◽  
Agricultural Landscapes ◽  
Spatial Extent ◽  
Association Patterns ◽  
Landscape Elements ◽  
Animal Populations ◽  
Linear Landscape Elements

Characterizing the spatial distribution of hedgerows over landscapes is important for understanding the effects of this distribution on the dynamics of plant and animal populations. Because hedgerows are planted or managed, the authors hypothesized that their distribution depends on the presence of other linear landscape elements, namely, roads and channels. Using proximity analyses, the authors thus assessed how the spatial distribution of hedgerows was impacted by the position of these linear landscape elements and the spatial extent of this impact for two contrasting agricultural landscapes. The results indicate that hedgerows were generally associated at short distances with other elements (100-150 m). Hedgerows had different association patterns depending on their orientation in one of the two landscapes. In that same landscape, within-landscape heterogeneity was related to different association patterns. These results indicate that models of the spatial distribution of hedgerows would gain from being based on the location of roads and channels in the studied landscape.

scholarly journals The experience of low-resource fauna research by using camera traps

2021 ◽  
Vol 2021 (21) ◽  
pp. 114-124
Author(s):  
Denys Vishnevskyi ◽  
Keyword(s):  
Spatial Distribution ◽  
Daily Activity ◽  
Roe Deer ◽  
High Sensitivity ◽  
Camera Trap ◽  
Camera Traps ◽  
Local Conditions ◽  
Low Resource ◽  
Animal Populations ◽  
And Control

The tasks of managing animal populations (conservation, exploitation, and control) require reliable initial information for their implementation. This information includes a number of parameters: spatial distribution, annual and daily cycles of activity, abundance and its dynamics, ecosystem relationships, reproduction, nutrition, mortality, and others. Of this broad set, abundance and territorial distribution are of basic importance. They affect all other parameters. However, these indicators are the most sensitive to the influence of factors of qualification and motivation of the performer. The solution to this problem leads to searching for ways to unify methods in order to reduce errors in the assessment. One of the solutions to this problem is the introduction of technical means such as camera traps. Camera traps have become an increasingly popular tool in wildlife research. With its help, the following tasks are solved: assessment of the number and spatial distribution of animals, daily and seasonal activity, and much more. This tool avoids the factor of subjectivity. At the same time, in our conditions, the price of a camera trap is high for a researcher. However, the methodological requirements for the study require the use of more than ten cameras. Thus, it becomes necessary to comprehend low-resource research and the results that they can bring. During 2018, research was carried out in the territory of the Chornobyl Reserve using six camera traps. The placement of camera traps was not systematic, but corresponded to the diversity of habitats. The objects of research were such representatives of mammals as the elk, deer, wolf, roe deer, wild boar, fox, raccoon dog, and hare. They are the ones that make up the set of species that can be effectively captured by a camera trap. The following results were obtained: daily activity, spatial distribution, quantitative characteristics of groups. As the results have shown, even a small number of camera traps makes it possible to assess the presence of the largest animals and their daily activity. It should be noted that this group of species is of the greatest interest from the viewpoint of regulation and protection. Numerical parameters such as quantity and relative abundance cannot be used for estimation. This is due to the high sensitivity to local conditions.

First data on population of stray dogs in Rostov-on-Don

2020 ◽  
pp. 27-28
Author(s):  
Aleksey M. Ermakov ◽  
◽  
Aleksandr P. Evsyukov ◽  
Keyword(s):  
Spatial Distribution ◽  
Age Composition ◽  
Stray Dogs ◽  
Large Cities ◽  
Animal Populations ◽  
Gender And Age ◽  
Sexual Composition ◽  
The Subject ◽  
Federal Laws ◽  
The City

Animal populations in large cities have long been the subject of public and scientific discussions. In Russia, there are currently no federal laws regarding the management of stray animal populations. The most common and problematic animals in cities are dogs. Urban populations of homeless and stray dogs are an important link in the conservation and transmission of pathogens that can lead to the development of zooanthroposes.To regulate the situation associated with homeless and stray dogs, it is necessary to take into account their number, gender and age composition. These data allow the competent management of the population and timely take measures to regulate it. The first data on the population of stray dogs in Rostov-on-Don are presented in the article. For animal counting was used technique developed by the ICAM coalitionrepeatedly tested in different cities of Europe and shown its efficiency. To estimate the number of dogs, the city was divided into 59sectors approximately equal in area. Each sector was divided into four parts, one of them was counted, the rest of the data was extrapolated. In each sector, 2-3 volunteers worked, who recorded the dogs they met, noting at the same time their approximate age, gender, size, and possible health problems. All actions during the calculations were carried out using the Strays ID program installed on volunteers' smartphones. According to the results of calculations, the total number of stray dogs in the city is approximately 2 712 individuals. The data on the sexual composition of the population, the number of sick and damaged dogs, their physique, spatial distribution by city districts and density are discussed.

Lithography below 100 nm

1983 ◽  
Vol 41 ◽  
pp. 96-99
Author(s):  
L. D. Jackel
Keyword(s):  
Spatial Distribution ◽  
Electron Beam ◽  
Electron Scattering ◽  
Electron Beam Lithography ◽  
Substrate Material ◽  
Local Electron ◽  
Electron Dose ◽  
Positive Resist ◽  
Exposure Process

Most production electron beam lithography systems can pattern minimum features a few tenths of a micron across. Linewidth in these systems is usually limited by the quality of the exposing beam and by electron scattering in the resist and substrate. By using a smaller spot along with exposure techniques that minimize scattering and its effects, laboratory e-beam lithography systems can now make features hundredths of a micron wide on standard substrate material. This talk will outline sane of these high- resolution e-beam lithography techniques.We first consider parameters of the exposure process that limit resolution in organic resists. For concreteness suppose that we have a “positive” resist in which exposing electrons break bonds in the resist molecules thus increasing the exposed resist's solubility in a developer. Ihe attainable resolution is obviously limited by the overall width of the exposing beam, but the spatial distribution of the beam intensity, the beam “profile” , also contributes to the resolution. Depending on the local electron dose, more or less resist bonds are broken resulting in slower or faster dissolution in the developer.

SEM evaluation of the TEM cold-stage double-film specimen

1984 ◽  
Vol 42 ◽  
pp. 272-273
Author(s):  
Jayesh Bellare
Keyword(s):  
Spatial Distribution ◽  
Sample Preparation ◽  
Sample Thickness ◽  
Specimen Preparation ◽  
Preparation Technique ◽  
Liquid Sample ◽  
Thin Specimen ◽  
Sample Preparation Technique ◽  
Cold Stage ◽  
Film Specimen

Seeing is believing, but only after the sample preparation technique has received a systematic study and a full record is made of the treatment the sample gets.For microstructured liquids and suspensions, fast-freeze thermal fixation and cold-stage microscopy is perhaps the least artifact-laden technique. In the double-film specimen preparation technique, a layer of liquid sample is trapped between 100- and 400-mesh polymer (polyimide, PI) coated grids. Blotting against filter paper drains excess liquid and provides a thin specimen, which is fast-frozen by plunging into liquid nitrogen. This frozen sandwich (Fig. 1) is mounted in a cooling holder and viewed in TEM.Though extremely promising for visualization of liquid microstructures, this double-film technique suffers from a) ireproducibility and nonuniformity of sample thickness, b) low yield of imageable grid squares and c) nonuniform spatial distribution of particulates, which results in fewer being imaged.

Macroprobe Mode for the Study of Segregation in Steels

1990 ◽  
Vol 48 (2) ◽  
pp. 260-261
Author(s):  
Auclair Gilles ◽  
Benoit Danièle
Keyword(s):  
Mechanical Properties ◽  
Spatial Distribution ◽  
High Performance ◽  
Volume Fraction ◽  
Sheet Steel ◽  
Acquisition Time ◽  
Chemical Information ◽  
X Ray ◽  
Accurate Quantitative Analysis ◽  
Optical Micrographs

During these last 10 years, high performance correction procedures have been developed for classical EPMA, and it is nowadays possible to obtain accurate quantitative analysis even for soft X-ray radiations. It is also possible to perform EPMA by adapting this accurate quantitative procedures to unusual applications such as the measurement of the segregation on wide areas in as-cast and sheet steel products.The main objection for analysis of segregation in steel by means of a line-scan mode is that it requires a very heavy sampling plan to make sure that the most significant points are analyzed. Moreover only local chemical information is obtained whereas mechanical properties are also dependant on the volume fraction and the spatial distribution of highly segregated zones. For these reasons we have chosen to systematically acquire X-ray calibrated mappings which give pictures similar to optical micrographs. Although mapping requires lengthy acquisition time there is a corresponding increase in the information given by image anlysis.

Ultrastructural analysis of the spatial distribution of MRNA

1992 ◽  
Vol 50 (1) ◽  
pp. 552-553
Author(s):  
Gary Bassell ◽  
Robert H. Singer
Keyword(s):  
Electron Microscopy ◽  
Spatial Distribution ◽  
In Situ Hybridization ◽  
High Resolution ◽  
Nucleic Acids ◽  
Colloidal Gold ◽  
Dna Probe ◽  
Nucleotide Analogs ◽  
Gold Particles

We have been investigating the spatial distribution of nucleic acids intracellularly using in situ hybridization. The use of non-isotopic nucleotide analogs incorporated into the DNA probe allows the detection of the probe at its site of hybridization within the cell. This approach therefore is compatible with the high resolution available by electron microscopy. Biotinated or digoxigenated probe can be detected by antibodies conjugated to colloidal gold. Because mRNA serves as a template for the probe fragments, the colloidal gold particles are detected as arrays which allow it to be unequivocally distinguished from background.

Membrane microdomains: lessons from microscopy

1995 ◽  
Vol 53 ◽  
pp. 776-777
Author(s):  
J.M. Robinson ◽  
J.M Oliver
Keyword(s):  
Spatial Distribution ◽  
Plasma Membrane ◽  
Epithelial Cells ◽  
Plasma Membranes ◽  
Cell Types ◽  
Imaging Modalities ◽  
Membrane Microdomains ◽  
Membrane Domains ◽  
Lateral Heterogeneity ◽  
Functional Importance

Specialized regions of plasma membranes displaying lateral heterogeneity are the focus of this Symposium. Specialized membrane domains are known for certain cell types such as differentiated epithelial cells where lateral heterogeneity in lipids and proteins exists between the apical and basolateral portions of the plasma membrane. Lateral heterogeneity and the presence of microdomains in membranes that are uniform in appearance have been more difficult to establish. Nonetheless a number of studies have provided evidence for membrane microdomains and indicated a functional importance for these structures.This symposium will focus on the use of various imaging modalities and related approaches to define membrane microdomains in a number of cell types. The importance of existing as well as emerging imaging technologies for use in the elucidation of membrane microdomains will be highlighted. The organization of membrane microdomains in terms of dimensions and spatial distribution is of considerable interest and will be addressed in this Symposium.

An analytical microscopic study of metals in fluidized catalytic cracking catalyst

1986 ◽  
Vol 44 ◽  
pp. 854-855
Author(s):  
Clifford S. Rainey
Keyword(s):  
Electron Microscopy ◽  
Spatial Distribution ◽  
Catalytic Cracking ◽  
Catalyst Deactivation ◽  
Coke Formation ◽  
Acid Sites ◽  
Y Zeolite ◽  
Fcc Catalyst ◽  
Fluidized Catalytic Cracking ◽  
High Regeneration

The spatial distribution of V and Ni deposited within fluidized catalytic cracking (FCC) catalyst is studied because these metals contribute to catalyst deactivation. Y zeolite in FCC microspheres are high SiO2 aluminosilicates with molecular-sized channels that contain a mixture of lanthanoids. They must withstand high regeneration temperatures and retain acid sites needed for cracking of hydrocarbons, a process essential for efficient gasoline production. Zeolite in combination with V to form vanadates, or less diffusion in the channels due to coke formation, may deactivate catalyst. Other factors such as metal "skins", microsphere sintering, and attrition may also be involved. SEM of FCC fracture surfaces, AEM of Y zeolite, and electron microscopy of this work are developed to better understand and minimize catalyst deactivation.

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