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303 Uppsatser om Predator-prey interactions - Sida 2 av 21

Movement patterns of snow leopard (Panthera uncia) around kills based on GPS location clusters

Research concerning movement patterns of wild animals has been advancing since GPS technology arrived. But studying the snow leopard (Panthera uncia) is still difficult because of the harsh territory it inhabits in Central Asia. This study took place in south Gobi, Mongolia, and aimed to estimate the time spent at kills and the maximum distance away from kills between visits. Snow leopards were monitored with GPS collars that took a location every five or seven hours. Potential kill sites were established by identifying clusters of GPS-locations in ArcGIS and visited in the field for confirmation.

Loggning av användares interaktioner : utvärdering av användbarhet

The disconnect between assumptions regarding computer users interactions made by software engineers and the actual interactions do, for various reasons, not always match. Gathering actual usage data from user interfaces can enable software designers to make better educated decisions. By buildning a prototype for collecting such data from a diagnosis tool for the automotive industry this project has shown not only how to benefit from the data but also how to perform the work. The data is 1 600 sessions consisting of 26 000 individual events. From this it has shown that available tools can assist in rudimentary questions regarding usage.

Reflektion genom interaktion : En analys av förbindelsen mellan spelarens moraliska handlingar och karaktärernas utveckling i tv/datorspelet Dragon Age: Origins.

The aim of this essay is to investigate the function and development of non-player characters (NPC) in the TV/computer game Dragon Age: Origins. The NPCs are analysed in order to see if their development is affected by the player character?s (PC) background and interactions. The game?s ethics is also investigated by studying how the NPCs treat the PC and what significance they give to his background and actions.The results show that the NPCs are affected by the PC?s interactions, and furthermore, that they are round characters, which is unusual in TV/computer games.

Predation som selektiv kraft bakom differentiering av populationer av sötvattensgråsugga, Asellus aquaticus

Predation is a strong dective force on invertebrate prey. Asellus aquaticus differs in pigmentation reed and submerged vegetation habitats in lakes. Light pigmented individuals al vegetation dominated by Chara sp. while dark pigmented individuals dominate in the reeds. These differences have been hypothesized to result from background matching.

Genotype by environment interactions of claw health in Swedish dairy cattle in tie stalls and loose-housing

Claw diseases are common diseases in modern dairy production. They are painful for the cow and costly for the producer. Differences in the prevalence of claw disease depending on housing system have previously been observed. This raises the question if there are genotype by environment (GxE) interactions for claw diseases in different housing systems. To investigate this claw trimming records for Swedish Red dairy cattle (SR) and Swedish Holstein cows (SH) were retrieved from the Swedish Dairy Association.

Positive human to cattle interactions and the possibilities to increase animal welfare, economy and safety for farmers

Cattle production systems are changing to bigger intensified systems with larger numbers of animals per farm and more free range systems while at the same time employing fewer people. Aversive handling has been known to affect cattle production negatively for many years, but lately scientists have started to focus more on what positive effects gentle handling and positive human-cattle interactions may have on beef and dairy production. Fear can cause high stress in production animals and this can contribute to not only reduced production within beef and dairy cattle, but also increased risks for accidents and decreased animal welfare. Therefore, by reducing the fear cattle experience of humans, it could be possible to increase production, decrease accidents and increase the welfare of the animals. Reducing the animals fear and stress can be done by simple means, such as walking and talking calmly around the cattle, associating humans to positive feelings (such as feed) and stroking the cattle?s body regions associated with social grooming.

Effects of brown bear (Ursus arctos) odour on the patch choice and behaviour of different ungulate species

The return of large predators to regions where they were previously extirpated has created a need for knowledge about their effect on prey species, not only their lethal but also their behavioural or risk effects. In this study the behavioural risk effects of brown bear (Ursus arctos) were tested on fallow deer (Dama dama), roe deer (Capreolus capreolus), red deer (Cervus elaphus), moose (Alces alces) and wild boar (Sus scrofa). This was done by using patches of fur to simulate the presence of the novel predator (brown bear), a novel nonpredator (reindeer (Rangifer tarandus) and no fur as control. These three treatments were then compared. The response variables measured were increased vigilance, decreased feeding time and change in patch use.

Examining Accuracy : Drönare och drönarangrepp: retorik, praktik och historia

The military conflicts of the early 21st century have seen the introduction and rise of a new military technology: the armed drone. With the United States acting as the driving force behind this technological advancement, the U.S Air Force and intelligence agency CIA have madedrones their weapon of choice for pursuing suspected terrorists and insurgents in various remotelocations. American military leaders and policy makers assert that the armed drone?s high levelof accuracy make it the best available weapons platform for this task. However, new researchshows that the use of drones may result in more civilian casualties than previously thought, andmay in fact be more fallible than conventional aircraft in this respect.

Stresseffekter hos får vid vallning och hantering

Vallhundar används av fårproducenter som ett arbetsredskap i den dagliga hanteringen av fåren, såsom vid flyttning, hämtning eller då enskilda individer ska separeras från flocken. Det finns många olika vallhundsraser och border collien är en av de vanligaste som används. Vid vallning utnyttjas fårens vilja att samla sig till en flock vid närvaro av predatorer. Vid stress hos får uppkommer ofta ett förändrat beteendemönster. Vid närvaro av en upplevd predator, till exempel en hund eller främmande människa, bräker djuren mindre än vanligt och stampar i marken.

Movement patterns of Eurasian lynx (Lynx lynx) around their kills in southern Sweden

During the last ten- fifteen years the Eurasian lynx (Lynx lynx) population in southern Sweden has increased considerably. This area has a high density of both people and roads and have a higher roe deer (main prey of lynx) density than the rest of the country. Movement patterns such as how long animals utilize their kills and how far they travel from their kills between revisits is unknown for lynx in southern Sweden. The aim of this study was to examine how different factors affected the time lynx used their kills and the distances they travelled from the kill between revisits. The data was prepared and calculated using ArcGIS and the study is based on 98 ungulate kills and 12 lynx individuals.

Brunbjörnens (Ursus arctos) inverkan på den nya svenska älgförvaltningen

The European Brown bear (Ursus arctos) has gone from basically being extinct in Sweden to, 2008 being estimated to a total of 3298 individuals. When looking at the new Swedish moose management system it is important to have an ecosystem-based approach and therefore include all the parts that moose impacts on and from in the management, especially the brown bear. Primarily in the spring and early summer the brown bear is a significant predator on moose calfs which must be taken into account in moose management. When the bear recolonize areas that it has previously been eradicated from, it will once again come in contact with people who are not accustomed to the bear's role in the ecosystem. We studied three groups of moose management areas with different predation by bears.

Interactions between some plant-parasitic nematodes and Rhizoctonia solani in potato fields

The pathogenic fungus Rhizoctonia solani causes major economic losses for potato producers in Sweden. The producers, as well as advisors, have reported possible increases in severity of R. solani when free-living plant parasitic nematodes are present and active. There are several examples in the literature of interactions between pathogens where one, or both species, support or increase the damage made by the other organism. These complexes are important to investigate and to be able to forecast, since even low incidences of fungi or nematodes may result in an interaction of significance.

"We'd go crazy without each other!" : En studie om kollegialt lärande på arbetsplatsen

This study means to research the importance and significance of the social and informal learning opportunities offered at a workplace. With Wenger?s theory about social learning and communities of practice as a starting point, this study will create understanding about how teachers at a school comprehend their opportunities for learning within the teacher community. The study is conducted at an independent school in Sweden, and is based on interviews with eight of the teachers employed at the school. The purpose of the study was to research how employees perceive how their social interactions with their colleagues can create learning, and what obstacles they might face along the way.

Läkemedelsinteraktioner: farmaceutisk viktig kunskap

Då jag som receptarie kommer att ha ett ansvar när jag expedierar läkemedel ville jag lära mig mer om interaktioner (samspelet) mellan olika läkemedel samt interaktioner mellan traditionellt växtbaserade läkemedel (TVBL) och vanliga läkemedel. Min avgränsning gällande TVBL kom att bli interaktioner mellan johannesört och vanliga läkemedel och detta därför att johannesört är det växtbaserade läkemedel som interagerar mest och kan ställa till det ordentligt vid fel kombinationer. Som receptarie har jag ett ansvar gentemot apotekskunden och därför kände jag att jag ville fördjupa mig i interaktionsproblematiken. Den farmaceutiska kompetensen innefattar i hög grad kunskapen om läkemedelsinteraktioner. Farmaceuter arbetar sida vid sida med sjukvården och har ofta kontakt med förskrivande läkare och då kan det vara bra att rent professionellt kunna hur specifika interaktioner yttrar sig.

Bibliotekariers och ungdomars bild av sociala medier En kvalitativ studie av bilden av sociala medier hos bibliotekarier och ungdomar, och hur man kan förbättra bibliotekarieprofessionens förmåga att förmedla sig själv inom ett digitalt rum

Social media have become a bigger and bigger aspect of daily life for many ages and especially within the youth culture growing from digital interactions. At the same time libraries seems eager to use this medium to reach out to the youth to inform and to educate. But do we know enough about how these two groups? views each other to be effective at this work? And is it even something that is wanted? What?s the image of social media from their point of view?The goal of this study is to investigate the image of social media from the point of view of two groups, librarians and youth. The study is based on a qualitative approach with a random selection of candidates.

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