The examination of the adequate nature conservation methods in a natural reserve, to conserve a specific species and / or increase biological diversity is the subject of this study. This work is based on four species, that can be found during the Spring season, liverleaf, wood anemone, brimstone and woodpecker. The incidence and availability is studied and closely observed for these species in twenty forests, i.e. ten forests which are nature reserves and ten forests with the similar characteristics as the nature reserves habitat, but are not nature reserves in Gnesta mucipality, Södermanland. Measurements of the tree crown and the diameter of the tree trunks where noted to study how these factors could affect the outcome of the abundance and incidence of the four species.

Abstract One of the leading causes of food borne infections in the world is due to Salmonella by con-suming poultry products including Eggs and meat. According to US Food and Drug Admin-istration (2009), 2 to 4 million cases of Salmonellosis in humans occur every year only in US. Salmonella causes wide range of diseases with enteric and typhoid fever, food poisoning, di-arrhea and gastro-enteritis. Many serotypes of Salmonella do not have host specificity and cause disease in all kinds of animals and humans. Salmonella has capability to modify accord-ing to the changing environment and it can develop resistance against routine elimination practices of sanitation, chemical treatments and antibacterial drugs. Newly established poultry industries in Pakistan are confronting various infectious diseases including Salmonellosis while in Sweden Salmonella prevalence in animal products con-sumed for humans is extremely low.

Hästar över hela värden är infekterade med gastrointestinala parasiter. De parasiter som har högst prevalens och orsakar sjukdom hos häst är cyathostominer, Parascaris equorum, Anoplocephala perfoliata och Strongylus vulgaris. Parasiterna kan orsaka alvarliga symtom så som obstruktion, kolik, avmagring och de kan även ge komplikationer som kan leda till döden. Syftet med denna litteraturstudie är att sammanställa information om hästens parasiter och om tillgängliga analysmetoder samt att undersöka dagens möjligheter till ett hållbart kontrollprogram för att minska resistensutveckling. Problematiken med den ökande resistensen har gjort att regelbunden avmaskning för att minska prevalensen av parasiterna har börjat ifrågasättas. Idag finns det kontrollprogram för att minska resistensutvecklingen hos hästens gastrointestinala parasiter.

The Swedish Welfare Act § 4 says that "Animals must be kept and cared for in a good environment for animals and in such a way that promotes their health and allow them to behave naturally." Pigs in the wild spend 80% of their waking hours walking around and rooting for food, eating and exploring their environment with its snout. Fattening pigs in commercial farms spend 80% lying doing nothing. A lactating sow is lying down most of her day, and only 10-20% of the body surface is in contact with the floor, so the pressure is high on these spots. Piglets lie down and paddle with their legs, with high liquid content in the tissues, several times an hour, to stimulate and massage the sow's udder. In the existing system, these individuals are held more often on floors that are anything but inviting to sleep on.

This work is a GIS study of fishing rights distribution between different categories of ownersand properties in the Stockholm Archipelago. The purpose was to create basic data used toestablish fishing laws and restrictions within the Stockholm County.Stockholm?s archipelago consists of a unique environment and is the natural life andreproduction environment for ? of Sweden?s reproducing fish species. The increasingpressure from fishing, tourism and weekend population increases the need for an efficientfishing administration to prevent impoverishment and to ensure the biological diversity inSwedish fishing waters. There is an increasing need to review fishing administrationmethodologies, as well as studying the categories of ownership and properties located insensitive areas and areas influenced by physical disturbances in order to establish effectivelaws and restrictions.The Swedish fishing rights for an area are currently not connected to the ownership of theproperty to which it belongs.

Sammanfattning: Liljebaggen, Lilioceris lilii (Scopoli) är den största skadegöraren på liljor tillhörande släktena Lilium och Fritillaria, och är ett problem i Sverige liksom i övriga Europa, Nord-Amerika och Asien. Skadan orsakas främst av larverna, men även av fullvuxna baggar, som äter på plantans blad, knoppar och blommor (Ernst, 2005). De kan orsaka allvarliga skador genom att äta upp alla blad på plantan (Gold et al., 2001; LeSage and Elliott, 2003). Biologisk bekämpning i Sverige verkar möjlig sen man har upptäckt parasitsteklar som attackerar liljebaggens ägg och larver i Europa. I de centrala delarna av Europa har Haye och Kenis (2004) funnit fyra arter av parasitsteklar som parasiterar liljebaggens larver, ichnemoniderna Lemophagus pulcher, Lemophagus errabundus, Diaparsis jucunda, och eulopiden Tetrastichus setifer. En äggparasit, mymariden Anaphes har också upptäckts, liksom hyperparasiten Mesochorus lilioceriphilus, en ichneumonid, som ofta parasiterar Lemophagus arterna. För att undersöka förekomsten av dessa steklar i Sverige gjordes insamlingar av liljebaggslarver under sommaren 2006 på olika platser i tre regioner, södra (Skåne), sydöstra (Småland och Öland) och mellersta (Stockholm) Sverige.

The study was performed in southwest of Colombia in close collaboration with the interna-tional centre of tropical agriculture, CIAT and supervised from the university of Valle, Uni-valle, Cali, Colombia and from the Department of Landscape Management and Horticultural Technology, SLU, Alnarp, Sweden. The main purpose of this thesis was to evaluate six different non-conventional insecticides and their ability to control whitefly Aleurotrachelus socialis in cassava Manihot esculenta. The aim was also to evaluate the most appropriate application technique for these products which were: Agronim, Biomel, Bioneem, EcoSwing, Coco soap + chilli and L´Ecomix. The products are mainly based on vegetable oil, soap and plant extract and cause primarily a physical contact effect which affirm that it is fundamental to obtain a high coverage of the underside of the leaves, where A. socialis is present.