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910 Uppsatser om Species conservation - Sida 27 av 61
Social and economic consequences of wolf (Canis lupus) establishments in Sweden
Wildlife contributes with many benefits to humans but also brings economic costs. From being eradicated in Scandinavia the grey wolf (Canis lupus) is returning to South-Western Sweden and people are not used to its presence. In Scandinavia carnivores have to co-occur with humans in a landscape used for many different interests. Consequences of wolf establishments are e.g. competition for moose, depredation on sheep and attacks on hunting dogs.
Kan mjölkkors utnyttjande av vallprotein bli bättre? : utfodringsstrategier och konserveringsmetoder
The purpose with this literature study was to investigate the possibilities for improvement of forage protein in dairy cows with focus on feeding strategies and conservation of forage protein. The utilization of forage protein in dairy cows is often not that efficient as it could be. The feed crude protein consists of both true proteins and non protein nitrogen. The digestion of proteins in the rumen depends on the protein degradation rate and the ability of the microbes to synthesize microbial protein. The microbes need a balance between carbohydrates that provide them with energy and proteins that are degradable in the rumen.
Identifiering av gallringsbehov med hjälp av flygburen laserskanning :
Thinning is one of the most important silvicultural activities in middle aged forests, partly to minimize damages and partly because it leads to earlier harvesting revenues and increases the value of the remaining trees. There are many different indices used to describe stand density and thereby the need of thinning in forests today. Studies have shown that forest variables can be estimated with high accuracy using airborne laser scanning and it is likely that the method could also be used to estimate forest density indices. In this study, the possibility of using the forest density index ?H² to determine and map priorities for thinning operations for a forest area was examined.
Brandgravar : Yngre järnålder i Broe, Halla socken, på Gotland : en studie i olika metoder, med fokus på kremeringen
This essay concerns the osteological cremated skeletal remains from Broe, Halla parish, Gotland of The Late Iron Age.The focus of this essay is to determine the position of the corpse on the pyre, whether the cremated bones were crushed after or prior to the cremation and if the individual was buried in the pyre. In addition the species, age, sex and skeletal abnormalities of the bones in question will be studied.The result of the research has yielded that the cremated bones did not need to be crushed to result in the small fragment sizes. Crushing of the bones may have happened during the cremation, this conclusion has been drawn through the comparison of a pyre experiment were bone fragmentation is evident with cremated foxes, and dogs in the cremation graves from Broe. The construction of the pyre and the position of the corpse could not be determined through colouring and fragmentation of the bones.The human's were commonly buried in the pyre, and in some cases it is possible that the "grave" in fact is the remainder of a pyre. The species found are dog, horse, cow, sheep/goat and bear.
Försvarsenhetens arkiv : Examensarbete på länsstyrelsen i Södermanlands län
The defence unit´s archive stretches over a time limit between the middle of 1971 to the end of 1987. The records the archive mainly contains are concerning the civil defence, inspection and construction of shelters, war- and crisis planning. The majority of the records are registered record, as often is the case with an authority?s archives. The main problems that occurred concerned what should or shouldn´t be public, the principle of provenance and what to prioritize; finish the project before deadline or make sure the records are prepared for a storage that ideally should last for several lifetimes..
Perfluoroalkyl substances in Arctic birds : a comparison between glaucous gulls and black guillemots from Svalbard
Perfluoroalkyl substances (PFASs) are ubiquitous in the environment today and they have been detected even in remote areas such as the Arctic. PFASs can be transported by the atmosphere and ocean currents but the transport mechanism is not fully understood. PFASs may be harmful to organisms due to their persistence in the environment, bio-accumulation potential and toxicity. Studies have shown that PFASs can cause adverse effects on the metabolism as well as the endocrine- and reproduction systems in organisms. In this study, PFASs were investigated in glaucous gull (Larus hyperboreus) (n=5) and black guillemot (Cepphus grylle) (n=4) from Svalbard.
Vilka mål och behov har olika typer av skogsägare kring sitt skogsägande? :
The NIPF (Non Industrial Private Forest) owners in Sweden have very differentiated goals
and needs with their forest. They have different backgrounds and some of them live at their forest estate while other live in an urban environment, and some are economically dependent on their forest estate while others are not. The heterogeneity among these forest owners creates problems for market actors that want to aim marketing messages to catch their interest.
This is the problem background to the task that was provided to us as an investigative masters thesis for us. Their request was a plan for ensuring a successful marketing towards different segments of the NIPF owners.
We commenced with a literature study based on market information and previously carried
out similar investigations. We summarized the most important market information from the
literature and created some hypotheses regarding goals and needs of the NIPF owners.
Att beskriva upplevelsen av stadens rum :
The city is complex, multi-faceted and fascinating. The same can be said about the rooms
of the city. The experience of the rooms of the city can be described in as many ways as
there are individuals. The question concerned in this essay is How can you describe the
rooms of the city as a phenomenon and how can you describe the experience of these rooms
in general?
The concepts city and room are widely understood and neither of them has a description
that can be used in all situations.
Kontroll av rengöring med ATP-luminometer hos livsmedelsverksamheter med pizzaberedning i Sundbybergs kommun
This BSc thesis is a part of an initial step of a collaboration between Skansen and Kenyan Wildlife Service (KWS) and constitutes of an inventory of the Nairobi Animal Orphanage run by KWS. Animal Orphanage takes care of orphaned and injured animals arriving from throughout Kenya. The project started out as a refuge and as a temporary place for animals in need of care and help. With time it has evolved to an establishment that resembles and functions more like an animal zoo. The aim of this inventory is to focus on how the biological needs of Congo grey parrots ( Psittacus erithacus erithacus) and cheetahs (Acinonyx jubatus) are met, in terms of management and housing.
Överlevnad, tillväxt och skador i planteringar av sitkagran (Picea sitchensis) efter stormen Gudrun
Sitka spruce (Picea sitchensis (Bong.) Carr) is just like Norway spruce (Picea abies) a species in thegenus picea. The natural range of Sitka spruce is a narrow strip along the west coast of North America. Itis the most coastal of all picea species, and very dependent on the mild and humid climate along thepacific coast.Sitka spruce has been grown a long time in the countries around the North Sea, particularly in GreatBritain where it currently is the most important species in British forestry. Sitka spruce has not beenplanted in Swedish forests to any large extent before the storm Gudrun in 2005. Several studies indicatethat the production of wood biomass is higher for Sitka spruce compared to Norway spruce.
Problembeteenden hos katt : orsaker och åtgärder
Under de senaste decennierna har synen på katter förändrats avsevärt. Från att ha setts som främst skadedjursbekämpare, har de nu tagit en mer framträdande roll som sällskapsdjur.Detta har medfört att deras miljö begränsats avsevärt och många katter hålls numera till största del eller enbart inomhus. Vilka konsekvenser detta fått för katten är ännu oklart. Hypotesen som låg till grund för denna litteraturstudie var att de problembeteenden som seshos dagens katter delvis beror av den stress som begränsandet av den naturliga miljön utgör. Syftet med studien var således att med hjälp av vetenskapliga artiklar klargöra vilka problembeteenden som förekommer, varför katten utvecklat dem samt hur de kan åtgärdas.
Glasbruksvillan och jakten p? den f?rsvunna dekoren
This thesis aims to propose a plausible design and construction of the lost gable
pediments of the Glassworks Villa in F?glavik, anno 1875. Through a
combination of building inspections, photo analysis and 3D modeling, the
researcher utilizes the combined results to digitally recreate the decoration that
once adorned the gothic revival villa's gable, to serve as basis for its actual
reconstruction. The study further highlights the use of modern technological
tools, such as 3D modeling software, to further enhance the understanding of
historical architectural elements. The researcher also emphasizes the challenges
and considerations involved in preserving and reconstructing historical
architectural details for future conservation endeavors..
Foraging and anti-predation behavior of Thomson?s gazelles (Gazella thomsoni) and Grant?s gazelles (Gazella granti) at a waterhole
Prey species make behavioral decisions to reduce the perceived risk of predation and the time spent vulnerable to predation. Behavioral responses to predators are for example selection of specific habitat types and the presence of predators influence individual vigilance. Furthermore, there is a variation in feeding niches with different herbivores focusing their foraging effort on different vegetation types which is also expected to affect the choice of habitat. Behavioral data on anti-predation and foraging behavior at on waterhole is collected from Thomson?s and Grant?s gazelles at Ol Pejeta Conservancy (0°00?N, 36°56?E) located in semiarid bushed grassland in Laikipia district of central Kenya.
Dikesrensning och skyddsdikning : en fältstudie och utredning av behov i södra Sverige
During the 20th century a significant proportion (about 15 %) of the peat-covered wetlands in Sweden were drained to improve forest productivity. Area wise, most of the forest drainage was done in northern Sweden, but relatively speaking a larger part of the wetlands have been drained in the southern parts of the country. Most often, the forest drainage resulted in increased forest growth, but failures were not unusual, and harmful effects, e.g. on species richness, have been a common cause for draining. Ditch cleaning is necessary for maintaining the ditches in good condition.
Epiphytic lichen flora in a boreal forest chronosequence
Epifytiska lavar utgör en viktig del av floran i den boreala zonen. Några miljövariabler är kända för att styra artrikedomen och artsammansättningen av epifytiska lavar på beståndsnivå, såsom träddiversitet, beståndsålder, fuktighet och trädens barkstruktur. Skogsbränder utgör den viktigaste störningen i boreala skogar men studier på brandeffekter på epifytiska lavar är mycket få. Detta arbete undersökte artrikedomen, diversiteten och artsammansättningen av epifytiska lavar på basala delar av björkar längs en gradient av 30 skogsbeklädda öar som skiljer sig i storlek och brandhistorik i den norra boreala zonen i Sverige. Målet med studien var att undersöka hur lavfloran påverkades av östorleken och miljövariablerna längs gradienten.