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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Ochranářská genetika rysa ostrovida v Západních Karpatech / Conservation genetics of Eurasian lynx in the Western Carpathians

Ungrová, Lenka January 2021 (has links)
Robust monitoring combined with genetic analyses are important approaches to protect and manage large carnivore populations successfully. The aim of this master thesis is to analyse Eurasian lynx (Lynx lynx) population within whole Slovakia for the first time using 15 microsatellite loci. Noninvasive genetics is an effective tool for monitoring animal species with large home ranges and low population densities. Noninvasive samples including feces, hair, urine and buccal swabs were collected together with tissue samples from dead (mostly roadkill) individuals. 187 samples were collected between 2017-2019, resulting in 59 successful genotypes. Two samples were incorrectly determined in the field and excluded from further analyses since they were wildcat samples. For population genetics analyses and demography, the dataset from the "Veľké šelmy 2" project was extended with 98 genotypes in collaboration with the Institute of Vertebrate Biology CAS. Overall, 68 lynx individuals were detected in the dataset of 155 genotypes. Relatedness analysis resulted in 67 significant relationships of the first degree and 9 significant relationships of the second degree. These results suggest a high relatedness among the whole population. According to the present thesis, Slovakian lynx population has the third lowest...
42

Coyote Diet and Movements in Relation to Winter Recreation in Northwestern Wyoming: Implications for Lynx Conservation

Dowd, Jennifer L. Burghardt 01 May 2010 (has links)
Increased snowmobile use in mountainous terrain has been highlighted as a conservation concern for some Canada lynx (Lynx canadensis) populations. Snow compaction resulting from winter recreation may potentially facilitate access by coyotes (Canis latrans) to habitats used by lynx during winter. Increased interactions could result in either exploitation or interference competition between the two species. Two recent, yet geographically distinct, studies showed contrasting findings regarding coyote movements and their use of snow-compacted trails during the winter. These findings suggest coyote association with snow-compacted trails may be regionally specific and dependent upon ecosystem dynamics and snow characteristics. The objectives of this study were to document diet, space use, and movements of coyotes occupying deep snow regions and explore whether a potential existed for increased interactions between coyotes and lynx due to snowmobile activity. We documented seasonal variation in coyote diets using scat collections to assess dietary overlap with lynx. Coyote resource use within and among habitats containing snowmobile activity was examined using coyote backtrack surveys during two consecutive field seasons in northwestern Wyoming. Although scat analysis findings suggest dietary overlap was not significant between coyotes and lynx during the winter or overall (all seasons combined), we lacked adequate sample size of lynx scats to determine if dietary overlap occurred during the fall, when coyote use of snowshoe hare peaked (24.1 % of all fall occurrences). Coyote backtrack surveys revealed that coyotes not only persisted in habitats used by lynx throughout the winter, but that snow compaction resulting from winter recreation use appeared to influence coyote movements during the winter months. Microhabitat analysis revealed that snow conditions influenced coyote behaviors and habitat use. This research provided insight into the impacts of winter recreation on coyote diet and habitat use during the winter months in northwestern Wyoming. In addition, these results have implications for local lynx populations in the southern periphery of their natural range. These results may assist land management agencies in planning and implementing management strategies to enhance lynx recovery, and may be used to guide decisions regarding areas designated for winter recreation and areas proposed for expansion of winter activities.
43

Názory žáků ZŠ na nebezpečnost vybraných savců / Opinions of Primary School Students on the Dangers Posed by Selected Mammal Species

Benešová, Šárka January 2021 (has links)
This thesis builds on my bachelor thesis "Selected mammals in elementary and secondary education". It deals with the opinions of 8th and 9th grade pupils of elementary schools on the dangers posed by selected mammal species. Among the selected species in this work are brown bear (Ursus arktos), wolf (Canis lupus), lynx (Lynx lynx), fox (Vulpes vulpes), dog (Canis lupus familiaris), and wild boar (Sus strofa). All these animals are found in the territory of the Czech Republic. In addition to the perception of dangers posed by these mammals, the thesis also ascertains knowledge of and attitude towards these selected species. The pupils also expressed their opinions about dog breeds and stated whether they currently had a dog, or had had one in the past, and if so, what kind it was. The study was conducted on the basis of a questionnaire survey. Questionnaires were given out at primary schools in areas, where some of the beasts abide (brown bear, wolf, lynx). The work also contains information about individual mammal species that were studied as well as the introduction of the domestic dog, its domestication and an overview of dog breeds. Key words: bear, wolf, dog, lynx, fox, wild boar, breeds
44

Creation and Evaluation of Bevameter

Röjens, Anton January 2020 (has links)
When testing new vehicles, tyres or snowmobiles the snow can differ from one minute to another. Developers need to know what kind of snow they are testing to be able to evaluate the characteristics and performance from the vehicles and tyres. The bevameter measures the stickiness, strength, friction and recovery of the snow with a torque and force number. This device is at the moment too big, it weighs about 70 kg and is 1 meter long and 0.7 meters wide and has to be towed by a snowmobile. This thesis will go through a redesign of the bevameter. The goal is to make this device as simple as possible so everyone can use it and master it. The proposed bevameter should be small, nimble and weigh about 4kg. It shall also be quick and easy to do tests with.
45

Genetic consequences of translocations in the Doñana population of the endangered Iberian lynx

Mora, Gaia January 2024 (has links)
Conservation genetics for endangered species is crucial in long-term conservation actions.Inbreeding depression and genetic diversity are main genetic parameters with relevance toconservation. The Iberian lynx was by 2002 the most endangered felid in the world. Manyconservation programs have been carried out during the last 20 years, greatly improving theoutlook of the species. There is a paucity of information on the genetic consequences of thereintroduction program thus far. In the following research study, the most endangered Iberianlynx population, the Doñana population, is assessed to determine its actual genetic status andevaluate the genetic consequences of translocations initiated in 2007. This was achieved by thereconstruction of the pedigree of the wild population, and molecular analysis based on genotypedata with the use of Single Nucleotide Polymorphisms (SNPs). The molecular parameterscalculated were inbreeding coefficients, ancestry and genetic diversity. Results show an increase ingenetic diversity and a decrease in inbreeding following translocations. Post translocationinbreeding was found and explained by ancestral classes the individuals belonged to. These resultslay foundation for the importance of the ongoing translocations within the population andemphasize the need in the coming years for the conservation efforts carried out so far.
46

Funkční konektivita a kvalita biocenter nadregionálního významu v přeshraničním prostoru NP Šumava a Bavorský les / Functional connectivity and quality of biocentres in the border area of Šumava and Bavarian Forest National Parks

EFFENBERKOVÁ, Lenka January 2012 (has links)
The Bohemian Forest, a mountain range located in Central Europe on the border between the Czech Republic, Germany and Austria, has many well-known qualities. The areas of Modravské slatě moors and Trojmezná, are considered to be the most valuable biocenters in the Czech part of the Bohemian Forest. This Master thesis confirms the quality of these areas in a transboundary context Natura 2000 habitats and their representativeness. A new transboundary (European) biocentre is proposed and its importance for several species is discussed.
47

Velké šelmy a jejich přijetí ve vybraném regionu / Great Carnivores and its Acceptation in Selected Region

Hadravová, Petra January 2017 (has links)
The diploma thesis is focused on finding the relationship of primary school pupils and secondary school students to the carnivores of the Czech Republic in the Lusatian Mountains and Ralsko Upland. Among the selected carnivores are brown bear (Ursus arctos), lynx (Lynx lynx) and wolf (Canis lupus). Fox (Vulpes vulpes) is used in the thesis for comparison. The thesis collects the opinions on these carnivores and compares them. The survey was realized by questionnaire survey. The thesis includes the characteristics of carnivores and their extensions.
48

Snowshoe Hare and Forest Structure Relationships in Western Wyoming

Berg, Nathan Daniel 01 May 2010 (has links)
Snowshoe hares (Lepus americanus) are a critically important prey species for Canada lynx (Lynx canadensis). Determination of snowshoe hare distribution and abundance is needed in western Wyoming for lynx conservation. We used linear regression to examine the correlations between snowshoe hare density, as determined by mark-recapture estimates, and fecal pellet plot counts on both uncleared and annually cleared plots on the Bridger-Teton National Forest, western Wyoming. We found significant correlations between hare density estimates and fecal pellet counts for both uncleared and annually cleared pellet counts; however the relationship was much stronger for annually cleared pellet counts. Adjusting the buffer size by omitting hard habitat edges (not used by hares) around the trapping grids improved correlations between hare density and fecal pellet counts further. We recommend pellet counts from annually cleared plots be used when precise estimates of snowshoe hare abundance are required. Though precision is sacrificed when using uncleared plots, they are useful as a coarse index of habitat use by hares. The derived regression equations should be used to identify foraging habitat for lynx in western Wyoming. In addition to snowshoe hares, in western Wyoming red squirrels (Tamiasciurus hudsonicus) and grouse (Bonasa umbellus and Dendragapus obscurus) are used by Canada lynx. Whether young forests or older multi-storied forests contain more snowshoe hares, red squirrels, and grouse in western Wyoming is currently unknown. We estimated snowshoe hare density, and indexed red squirrel and forest grouse abundance in 3 classes of 30-70-year-old lodgepole pine (Pinus contorta) and 4 classes of mature multi-storied forest with a spruce (Picea engelmannii)-fir (Abies lasiocarpa) component. We recorded landscape and forest structure characteristics to understand how these influence lynx prey abundance. Overall, snowshoe hares, red squirrels, and forest grouse were more abundant in multi-storied forests than young forests. Forest attributes that predicted prey abundance were often more prevalent in multi-storied forests. Results from this study suggest that multi-storied forests with a spruce-fir component were disproportionately important to snowshoe hares, red squirrels, and forest grouse in western Wyoming. Canada lynx conservation efforts should focus on maintaining, enhancing, and promoting multi-storied forests in this region.
49

Ambivalences : suivi de : La polyphonie dans La constellation du Lynx : un dialogue explorant l’Histoire

Poissant, Maude 19 April 2018 (has links)
Partie création : Le recueil de nouvelles Ambivalences, construit dans une logique de multiplicité des voix, explore le thème des apparences, par le biais d’histoires racontées par des personnages ou des narrateurs différents. Neuf nouvelles contribuant à tisser cinq récits autonomes prennent donc place dans ce recueil, qui cherche à mettre en relief les divergences entre les points de vue des personnages. Partie réflexive : La partie réflexive porte sur la notion de polyphonie telle que présentée et étudiée par Bakhtine, puis par Julia Kristeva, et sur ses manifestations dans le roman polyphonique de Louis Hamelin La constellation du Lynx ainsi que dans le recueil Ambivalences. Après une présentation du cadre théorique portant sur la question de la polyphonie et du dialogisme, cette partie réflexive entreprend une étude du roman de Hamelin, de même qu’une mise en parallèle des nouvelles du recueil Ambivalences.?
50

Porovnání postojů žáků ZŠ a SŠ k velkým šelmám zejména pak k vlku obecnému (Canis lupus) a psu domácímu (Canis lupus familiaris) / Comparison of Attitudes of Primary and Secondary Schools Students to Large Carnivores, Especially the Common Wolf (Canis lupus) and Domestic Dog (Canis lupus familiaris)

Mejzr, Martin January 2012 (has links)
Today, the issues related to the presence of bears and wolves in the Czech Republic are more frequently discussed due to their occasional occurrence. The significant part of the public still considers these predators dangerous and they even think that a man is supposed to be their potential prey. A lot of surveys confirming this have been already taken, but none of them was focused on the views of primary and secondary schools students. As they are a part of the school education system, their views on the large carnivores should be mainly shaped by it. A questionnaire-based survey was used to find the attitudes of students. The first part of the questionnaire focused on the students' opinions about the dangerousness of predators, its reasons and common wolf presence in the Czech Republic. The second part of the questionnaire is focused on the domestic dog, which has wolf origins. It deals mainly with the attitudes of students to selected dog breeds, dog domestication awareness and views on the so- called "fighting breeds". This work has been aimed at identification of attitudes of the primary and secondary school students from different regions of the Czech Republic to the selected predators. The survey was also taken at primary schools in the High Tatras Mountains, an area where all the large...

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