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703 Uppsatser om Species richness - Sida 35 av 47
Distribution of wild boar (Sus scrofa) damage and harvest loss in crop fields
The last decades the populations of wild boar (Sus scrofa) has increased rapidly over the species? entire European range, including Sweden. This is followed by increasing human-wildlife conflicts as a result of the wild boar foraging behavior, causing damage to agricultural crop fields due to trampling and feeding. To be able to minimize damage we need more knowledge of where in the fields the risk of damage is high and what features in the landscape that affect this risk. I analyzed damage distribution in relation to the distance to six different landscape features; forest, road, ditch, building, game field and bait station, in the study area, the Island Mörkö in eastern central Sweden.
Hur anpassar sig Gyps-gamar (Gyps rueppellii och G. africanus) i Östafrika till oregelbunden och osäker födotillgång?
In East Africa live two species of Griffon Vultures; Rüppel?s Griffon Vulture (Gyps rueppellii) and African White-backed Griffon Vulture (G. africanus). One of the apparently most important factors limiting the population of these birds is food supply. Griffon vultures nest for eight months of the year, and are during this period geographically tied down to the nesting place.
Advantages and disadvantages of different observation methods on a troop of wild olive baboons at a river in Southern Kenya
Every observation method has its advantages and disadvantages and a well-adopted method gives more reliable results. Factors affecting the choice of the most appropriate methods for recording foraging behaviours include species, group size, environment, seasons and age. The focus for this study was to determine which method is most appropriate for studying the foraging behaviour of a troop of 89 olive baboons (Papio anubis) living in a riverine forest by the Southern Ewaso Ng'iro River by Lale'enok Resource Centre in Kenya. To determine this, a literature study was carried out to compare methods from monkeys and apes. I found instantaneous sampling was the most common method with intervals of 5 minutes in most cited studies.
John Deweys filosofi : En tolkning av John Deweys pedagogiska filosofi
John Dewey föddes år 1859, samma år som Charles Darwin bröt ny mark för människan genom sin Theory of Species. Genom Darwin skulle grunden för det kollektiva mänskliga tänkandet och förståelsen av oss själva aldrig förbli detsamma. För Dewey precis som för Darwin är det förståelsen av människan och hennes värld som är det intressanta.Denna uppsats är en närläsning av Deweys verk Demokrati och utbildning som publicerades för första gången 1916. Verket som är skrivet på tidigt 1900-tal har haft ett stort inflytande på pedagogiskt tänkande generellt, men är också ett av de verkligt intressanta arbetena rörande människan och utbildningens roll för det demokratiska samhället. Verket är av idémässigt fundamental betydelse för den filosofiska tanketradition som kallas pragmatism då Dewey fångar upp den bärande idén om människan i samhället som en del av världen och som beroende av en bra utbildning.Uppsatsen har för avsikt att förmedla och tolka de tankegångar som Dewey låter framträda i Demokrati och utbildning.
Butorfanol till get : farmakokinetik efter subkutan injektion
Today there are no analgesic drugs approved to be used in goats. Drugs approved for use in other species are consequently being used without knowing the pharmacokinetics of these drugs in goats. The purpose of this study was to investigate the pharmacokinetics of the opioid butorphanol when given subcutaneously in goats. Subcutaneous administration might extend the half-life compared to intravenous or intramuscular administration. Eight clinically healthy, non-pregnant 6 months old female goats were used.
Cissus Quadrangularis Linn
The aims of the study were to investigate the prevalence and antibiotic resistance of Campylobacter jejuni and Campylobacter coli in chicken and chicken products, and to investigate farmer awareness of antibiotic resistance development. The study was conducted in the Can Tho province in Vietnam during six weeks in October to November 2008. Ninety-six samples from raw chickens were collected from twelve market places and analysed for the presence of Campylobacter. A total of 96 cloacal swabs from 20 farms were obtained and analysed for the presence of Campylobacter. Farmers were asked to answer eight questions concerning the housing of the chickens, modes of handling sick animals as well as use and knowledge of antibiotics and resistance development to antibiotics.
Utvärdering av näringsstatus inför återskapande av kalkkärr vid Hagebyhöga, Östergötland
Calcareous fens constitute a specific habitat which is uncommon in Europe and protected by the EU habitat directive due to its importance to several threatened species. Hagebyhöga in Östergötland is a calcareous fen habitat included in the Natura 2000 Networking Programme. Adjacent to the existing fen, a degraded fen area is situated. The area has been used for agriculture for several years but is now going to be restored to its former state by the county administrative board of Östergötland.When working with restoration of degraded fen areas it is important to aquire knowledge about the chemical soil conditions. Plant growth limited by phosphorus and low fertility are characteristic conditions for calcareous fens, whilst arable land usually is highly fertile and limited by nitrogen.The purpose of this study is to bring forth useful knowledge for restoring the degraded calcareous fen of Hagebyhöga.
Porcine viruses in Uganda : a study of TTSuV and PPV4 in wild and domestic pigs
Uganda has the largest pig population in east Africa, and most of the animals are owned by smallholders. Infectious diseases among pigs have a devastating impact on the livelihood of these farmers, which are dependent on the proceeds from pig rearing. In a metagenomics study of the wild pig species bushpig (Potamochoerus larvatus), the porcine viruses Torque teno sus virus (TTSuV) 1and 2 and Porcine parvovirus 4 (PPV4) were detected. TTSuV1 and 2 are ubiquitous in the world?s swine population, and PPV4 has been found in USA and China, but neither of them has been studied in Africa previously.
The efficiency of the newly launched predatory mite Amblydromalus limonicus : biological control of thrips in cucumber
In this study, the efficiency of a newly launched predatory mite, Amblydromalus limonicus, has been
examined for its potential to use as a biological control agent in cucumber production. A. limonicus
can be used for biological control of two thrips species, Frankliniella occidentalis and Thrips tabaci.
Field trials were conducted in greenhouses of two conventional cucumber growers in Scania, the
southern part of Sweden. The basic control agent used against thrips was the predatory mite
Amblyseius swirskii. In selected areas, additional A.
Jätteträd ? inventering, bevaring, skötsel samt rekrytering :
During the summer of 2007 I was employed by Högestad Christinehofs Förvaltning AB. My
main task was to make an inventory of giant trees at the estate. Högestad and Christinehof,which with their total possession of 13 000 ha of land is the biggest estate in Scania.
A giant tree is a tree with a diameter in breast height more then 1 meter. Trees of these
dimensions are registered by Swedish authorities. Landowners with a giant tree on their
property can receive a subsidy for cutting trees that are in competition with the giant tree.(Levenskog, 2007)
Giant trees are important for biodiversity in the landscape and there are important habitats for different insects, birds, bats, lichens and funguses.
Taktisk planering med geografisk hänsyn : fallstudie med Heureka PlanVis på SCA Skogs distrikt Liden
SCA is the largest private owned forest owner in Sweden, with an ownership of 2 million hectares of productive forestland. To manage the planning of such large areas and to fit the traditional organization structure of a Swedish forest company, the planning approach is subdivided into three stages; strategic, tactical and operational.
The strategic part, based on a statistic sample of stands, returns a harvest level estimate which should then be implemented at actual sites in the tactical part. This procedure can lead to incompatible solutions as the strategic solution is not necessarily possible to translate into actual sites in the tactical plan. The geographic aspect is important in tactical planning due to the large costs for moving equipment and maintenance of a large number of forest roads.
Parkkaraktärer : ett verktyg för planering och gestaltning av grönområden
An increasing number of peole are resisting the attraction of living around nature and opting instead to spend their lives in cities. Parks and green areas play an important part in our well-being and we become fascinated with the diversity of nature, in which we find a peacefulness that is unique. Amongst other things, being surrounded by nature can reduce high blood presure, lower the production of stress hormones and stimulate the mind and our ability to concentrate. It is therefore vitally important to entice city residents to parks and green areas to improve their physical and mental well-being. Previous research has shown that humans are seeking for certain characteristics in the parks and green areas which they are visiting.
Maximerande av ekosystemtj?nster i urbana kulturmilj?er: En fallstudie om tr?dval i Pommerska tomten i Mariestad
The purpose of this work has been to explore what ecosystem services a small green area in an urban
environment can offer and whether specific trees can be used to maximize regulatory ecosystem
services in a cultural-historical environment. Additionally, it investigates whether there is any
difference in ecosystem services depending on whether these trees, or trees that better fit into the
cultural-historical environment, are used. Through simulations and comparisons with existing trees in
Pommerska tomten, Mariestad, Sweden, a pocket park within a national interest area, different
hypothetical tree planting options are analyzed and evaluated. To measure ecosystem services, the
website My-Tree, developed by the US equivalent of the Department of Agriculture, was used. By
inputting data about the tree, such as location, species, vitality, stem diameter, and solar exposure,
My-Tree calculates some of the ecosystem services the tree provides.
Utvecklingen hos nattskatta (Solanum nigrum L.) och dess bekämpningsbehov i konservärtsodling :
Black nightshade (Solanum nigrum L.) is a major problem in gardenpea cultivations
contracted by Findus AB, a Swedish food processing company. The main problem is that the
nightshade berries contain solanin and, thus, are not tolerated in the marketed product, which
is fresh frozen peas. In addition, berries have the same size and color as the peas and cannot
be separated at the factory. Black nightshades have the last ten years become a more common
weed in field grown vegetables in the southern parts of Sweden. This MSc thesis presents an
experiment conducted in 2005, aiming at developing a tool for predicting the need for control
of black nightshade in peas.
Brown bear (Ursus arctos) den site concealment in relation to human activity in Scandinavia
As a hibernating species, the brown bear spend most of the winter months in a den as astrategy to avoid unfavorable conditions. The denning period is a vulnerable time for bears,making them unable to flee disturbances without losing valuable amounts of energy. Brownbears' wariness of humans and avoidance of anthropogenic disturbance often steer denningbears away from human infrastructure, and bears thereby avoid possible disturbance and itsassociated energetic costs. This study was carried out to test the hypothesis that bearsdenning closer to infrastructure select more covered den sites to compensate for the closedistance. Dens from 32 individuals were visited and analyzed in terms of sighting distance(a measurement for den horizontal cover) and habitat ruggedness, in relation to distances toinfrastructure.