Local differentiation may occur during a short period of time and is part of the formation of new species. The isopod Asellus aquaticus is an example of a species in which local adaptation has occurred during a short period of time. An establishment of stonewort (Chara spp.) vegetation in Lake Tåkern (in the 2000) resulted in two different Asellus ecotypes; a lighter pigmented, smaller one that lives among stoneworts grazing periphytic algae, and a darker, larger ecotype that feeds on decaying leaves in reed (Phragmites australis vegetation. The purpose of this study was to examine whether there are differences in growth between ecotypes, depending on whether the food was periphytic algae or leaves, and to study the choice of substrates between the two food types. For the study, animals from both habitats were brought in from Lake Tåkern to the laboratory.

Background:Incoming medical alarm is a common routine for emergency nurses. Working in these situations may represent a major burden on the individual nurse. Purpose: To investigate emergency room nurses' experiences in receiving medical alerts focused on education, safety, security, skills and experience, and andherence to guidelines. The purpose was also to investigate whether there were any differences in action between the emergency room nurses who had worked longer or shorter period than two years with this.Method:The design was quantitative, comparative and descriptive. Surveys were distributed to 30 nurses who worked in the emergency room at a Swedish hospital.

In the latest edition of NRC (2007) the feeding recommendations for Ca and P to growing horses were increased with 35 and 25 %, respectively, based on results from a Canadian study showing that daily endogenous fecal losses of Ca and P were greater than previously suggested. A Ca absorption efficiency of 50 % is used for all horses. However, the true absorption efficiency might be as high as 70 % in young horses. P absorption efficiency is assumed to be higher for growing horses because their diets are often supplemented with inorganic P. Thus, an efficiency of 45 % is used for growing horses as compared to 35 % for mature horses.

Syftet med denna studie är att utifrån befintlig officiell kriminalstatistik, självdeklarationsundersökningen i årskurs nio, SCB:s Undersökning av levnadsförhållanden och Brå:s Nationella trygghetsundersökning belysa och jämföra ungdomsvåldets utveckling i Stockholms, Västra Götalands och Skåne län mellan åren 1995 och 2008 och sedan jämföra de resultaten med statistiken för hela Sverige. Resultatet av dessa statistiska data ämnar jag analysera, diskutera och problematisera utifrån tidigare forskning i ämnet, sambandet mellan alkohol och våld och urbaniseringens inverkan på, och samband med våldsbrott.De frågeställningar som studien är tänkt att besvara är följande:- Hur har ungdomsvåldet utvecklats i Stockholms, Västra Götalands och Skåne län mellan åren 1995 och 2008?- Hur ser denna utveckling ut i förhållande till statistiken gällande Sveriges riksnivå under samma period?- Vilka skillnader eller likheter går att finna dels mellan de tre länen och dels mellan länen och hela Sverige under nämnda period?Sammanfattningsvis tyder studiens resultat inte på någon ökning av antal våldsbrott som begås av ungdomar under perioden 1995-2008. Utsattheten för våld eller hot bland ungdomar ser inte heller ut att ha ökat under samma period. Dessa resultat gäller för samtliga län och även för hela Sverige.

Active immunization against gonadotropin-releasing hormone (GnRH) is an alternative to surgical castration of male pigs to avoid boar taint. The aim of this study, including 128 pigs, was to evaluate the effect of a GnRH-vaccine Improvac® on performance and on social and sexual behaviour. Male pigs were assigned to three treatments; surgical castration at four days of age, immunization against GnRH and no castration. Vaccination was performed eight and four weeks before slaughter. Surgically castrated male pigs had significantly lower daily weight gain during the suckling period than entire male pigs (235 vs.

This is an essay about unemployment in Trollhättan during the period 1880-1910. In my essay I write about what was made to help the ones who were unemployed. I ask the questions: What did the society, the workers and last but not least the unemployed themselves do?My conclusion is that some things were done. For example were The Labor Unions in their growth and economical support from them and the county could help some people.

The milk production has developed rapidly the last years. The milk production per cow is increasing and the production units are larger with an increasing number of animals and a decreasing number of workers. Many milk producers invest in automatic milking systems (AM) to meet this change. In these systems the cows can voluntary decide milking frequency and usually the milking frequency are higher than two times per day. But how does the milking frequency effect the composition of the milk? The aim of the present study was to study the effect of milking frequency on the milk composition and the milk fat quality.

Today?s forest managers implement a large number of methods to increase the amount of dead wood in Swedish forests. They use everything from high cutting of trees to girdling trees and burning forests. However, implementation of these measures without proper knowledge of their consequences is a common problem. This study has been performed to increase knowledge about two of these measures, girdling and high cutting, and how these actions affect the number of wood-living insects living on dead trees.

The abrupt and early weaning of intensively kept lambs may have serious animal welfare implications, but relatively little is known about this. Weaning includes the breaking of the mother-young bond and abrupt replacement of milk by solid food, often coinciding with changes in the (social) environment. Altogether, these changes are likely to affect lamb welfare significantly. This study aimed to establish how strong and persistent lamb welfare is impaired following abrupt weaning by means of measuring behaviour parameters indicative of affective state. Also, we investigated the existence of a diurnal rhythm in play behaviour, which is considered an important indicator of positive affect and good welfare.

Predation is one of many factors that form the structure of the macroinvertebrate community in lakes, wetlands and watercourses. Earlier studies lack an examination concerning how fish- and waterfowl predation affect macroinvertebrates during shorter periods in the spring. I performed an exclosure study in the shallow eutrophic Lake Tåkern which is located in the western part of Östergötland County, Sweden. The experiment was performed during a three week period (1-21 April 2012) when the water temperature was low and the density of migrating diving ducks was high. The experimental cages used included three out of four different treatments; general predation (open cages), bird exclusion (net with mesh size 90*45mm) and no predation (net with mesh size 1*1mm).

This study investigates how social interaction affects newly arrived pupils? views on their study situation in the Swedish educational system. The aim is to give a contribution to the discussion on the notion of including ?the Other? in educational practice in multicultural schools. Semi-structured group interviews were conducted to explore how the intercultural perspective and the theory of inclusion can be used to explain the dynamics of social interaction.

Background:Incoming medical alarm is a common routine for emergency nurses. Working in these situations may represent a major burden on the individual nurse. Purpose: To investigate emergency room nurses' experiences in receiving medical alerts focused on education, safety, security, skills and experience, and andherence to guidelines. The purpose was also to investigate whether there were any differences in action between the emergency room nurses who had worked longer or shorter period than two years with this.Method:The design was quantitative, comparative and descriptive. Surveys were distributed to 30 nurses who worked in the emergency room at a Swedish hospital.

Arbetet behandlar Universals skräckfilmsproduktion under dess så kallat klassiska period, från ljudfilmens genombrott fram till USAs inträde i andra världskriget i december 1941. Det inleds med en kort historik av studions utveckling, främst under Laemmle-dynastins ledning, samt med korta tillbakablickar på stumfilmsperiodens skräckfilmer. Syftet är att beskriva hur skräckfilmen utvecklades, konstnärligt, företagsekonomiskt och produktionstekniskt, under denna period. Tyngdpunkten ligger givetvis främst på Universal, som snabbt blev kända som de främsta skräckfilmsproducenterna, ett rykte som man fortfarande upprätthåller.Vidare beskrivs alla Universals skräckfilmer från och med Dracula (1931) fram till och med The Wolfman (1941), som väl kan beskrivas som den sista riktigt stora skräckfilmen, innan bolaget förföll till mer eller mindre obegåvade uppföljare..

The first two weeks in a pup's life is called the neonatal period. This period is dominated by growth and development of organs and senses. The puppy is born blind and deaf and the physiological disability makes it unable to move properly. The neonatal period is characterized by a lot of sleeping. The pup receives the important milk and warmth from the bitch.

The main goal with the master thesis has been to do a status evaluation of the chain machinery with its start chain and wire to secure the production on a short basis due to that a reconstruction is not planned at this time. An evaluation of the condition of the start chain and the rollers in the chain depository has been done. An offer has been requested for a new start chain and the evaluation of the start chains may be a basis for the decision taking. The production has been able to go on, although it has arisen some problems which have been difficult to find the causes for. There is no gathered ?picture? of the machinery status and a mapping of each machinery has been compiled of comprehensive logs.