Sökresultat:
301 Uppsatser om Fish farming - Sida 3 av 21
Uteservering för Hotell & Restaurang Villa Anna : urban odling i uteserveringsmiljö med storytelling som gestaltningsverktyg
In this paper, I design a new concept for a patio at Hotel and Restaurant Villa Anna in Odinslund, Uppsala, Sweden. Through this design, I examine how urban farming can thrive in a restaurant-context. The purpose of the design is to give the visitor a sense of the core values of the cuisine and to strengthen the sense of place by storytelling. My methods are comprised of a literature study on urban farming and storytelling as well as a discussion with the res-taurateur Rafael Löfstedt. I create a story of the place by examining its historical background and connect it to the current philosophy of the Villa Anna restaurant.
Vermicompost for reduction of vegetable waste - and a possible means to produce fish feed in aquaponic systems?
Aquaponics is a food production system consisting of a consecutive cultivation of plants and aquatic animals, fish or shellfish, in recirculating water. The plants feed on the nutritious effluents from the fish tank and bacteria converts ammonia from the fish tank into nitrate that is absorbed by the plants. The plants receive nutrition and the fish gain purified water.
The environmental impact of the production of fish meal and fish oil used in conventional fish feed includes a large consumption of fossil fuels with subsequent carbon dioxide emission.
The aquaponic system can be made environmentally sustainable and self-supporting if supplemented with a vermicompost/vermiculture for the production of worm protein as a fish feed.
Vegetable waste from the hydroponic part of the system can be reused as worm feed in the compost and the protein rich worms can be harvested, dried and grinded and brought back to the aquaculture as fish feed.
As a first step in this direction, I have investigated the effect of recycling of vegetable waste in vermicomposts on the growth and number of earthworms (this was evaluated after harvesting).
The hypotheses were that earthworms can be cultivated in the vegetable waste and that by adding manure to the vermicompost it is possible to obtain a nutrient content adequate to support a continuous worm harvest, in other words create a vermiculture.
Eisenia fetida and Dendrobaena veneta were grown in 20 L bins containing peat mixed with either poultry or cattle manure. The proportions were 70% peat and 30 % manure. Discarded plant parts from lettuce cultivation was added to the vermicomposts (35 g per week) and water was supplied
with 0.8 L per week.
Listeria monocytogenes i vakuumförpackad lax :
Listeriosis, which is caused by Listeria monocytogenes, is a rare food borne disease that primarily affects people whose immune system is weakened. These may be elderly people, pregnant women, new-born infants and individuals on immunosuppressive medication. The most common symptoms are meningitis, septikemia and abortion. The mortality is high, on average 20-30 %.
In recent years the number of cases in Sweden has increased.
Hälsostatus hos abborre (Perca fluviatilis) i Gumpfjärden, Bottenhavet :
Perch (Perca fluviatilis) is a very popular fish in Sweden and it is common in Swedish waters. In some areas along the Swedish coast the perch population has decreased. It is therefore important to get a view at the health status of perch. During April, July and August of 2008, a total of 346 perches were caught in the Gump Bay in the Botnian Sea. The fish were mainly caught by net but also by rod.
Full Circle: upstream and downstream migration of Atlantic salmon (Salmo salar) in the northern Swedish river Vindelälven
The life cycle of the anadromous Atlantic salmon (Salmo salar) can span large geographic, political, and socio-economic boundaries. Management strategies and regulations that only concentrate on small spatial scales often overlook larger basin-wide problems, especially relating to post-spawn seaward migration. In this master thesis one entire migration cycle of wild adult Atlantic salmon in the unregulated northern Swedish river Vindelälven was monitored by radio-telemetry tracking during upstream spawning migration and downstream seaward migration back to the Baltic Sea. The effect of ladder passage variables (time to pass, total time in the ladder, passage day over the ladder) at a fish ladder downstream in the river Umeälven, as well as fish size, were evaluated to determine if differences in upstream migration distance in the river Vindelälven could be observed. Ladder passage variables did not affect migration distance, but size exhibited a negative relationship to migration distance.
Vattenflödets betydelse för fångster av lekvandrande lax (Salmo salar) och öring (Salmo trutta) : En utvärdering av laxfällan vid vattenkraftverket i Forshaga
Many watersheds have lost stocks of migrating fish species because of the development of hydroelectric plants and other fragmenting barriers. The remaining stocks of migrating Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in River Klarälven, Sweden are five times smaller compared to one hundred years ago. A fish-trap at the hydroelectric plant in Forshaga has been vital for the continued existence of the stocks. This is the first hydroelectric plant of eight, blocking the way to the spawning grounds. Spawners are collected in the trap for both hatchery and transport by truck upstream and past seven more hydroelectric plants to the spawning grounds, where they are released for possible natural reproduction.
Tillväxtmönster och åldersstrukturer hos opåverkade bestånd av strömlevande Arktisk harr i Sibirien :
It is hard to find streaming waters where humans haven?t affected the fish populations or the
running water it self. In many streams the fish populations are over harvested and this results
in a lack of older and larger fish. This is also the situation for many populations of Grayling
(Thymallus spp.). To be able to develop management plans and to perform actions that
improve the situation for the grayling, it is therefore crucial to know what natural, by humans
unaffected populations look like.
Undersökning av stereo och dynamiskt perspektiv i horisontell fish tank virtual reality
Ett par av de trick som används i virtual reality för att få 3D-världen att verka mer levande är stereoskopi och ett dynamiskt perspektiv med head tracking. Tidigare undersökningar har visat att head tracking har större effekt på 3D-upplevelsen än stereo [1], i alla fall när bilderna visas på en vanlig datorskärm. Den här undersökningen har försökt att ta reda på om samma sak gäller då den virtuella världen projiceras på en horisontell bordsskiva. Intressant nog går resultaten från det genomförda experimentet tvärt emot all teori. Tyvärr kan inga konkreta slutsatser dras eftersom alltför många felkällor har uppmärksammats, men studien öppnar ändå upp för framtida forskning..
Samarbete mellan lantbruksföretag : möjligheter och problem
Nowadays, cooperation is necessary and this study tries to illuminate the possibilities and problems about cooperation in fiction between 7 small/midsize farms in Skåne. Conventional Farming is done with grain and sugarbeets as specialization. Calculation of machine costs have been done and compared in the study, both for the farms in thorough and the fictitious operation companies. Business ratios as depreciation/ha, interest/ha and maintenance/ha have been calculated.
In this essay we present a proposal about how a practical implementation can be done. In the proposal there is an example how the distribution of work can be done.
Samband mellan en längre tillväxtsäsong och en ökad smoltstorlek i Vänerområdet
AbstractThe purpose of this study was to see if there is a connection between smolt length from Brattfors salmon cultivation and temperature. Climate changes are expected to give a higher temperature that could result in a longer growing season for the fish.Cultivated smolt is today bigger than it was before, it is also bigger than the wild salmon. The growth season of salmonids depend on the water temperature, salmonids need 6-80C to grow. Water temperature has been surveyd since the late 50´s in Brattfors. The result shows that it?s now considerable more days per year with higher temperature.
Passiva lantbrukare ? en effekt av EU:s jordbrukspolitik : en studie av ett antal faktorers påverkan på svenska passiva lantbrukares attityder till markanvändning och EU:s jordbrukspolitik
The problem with passive farmers has arised as an effect of the European Union´s common agricultural policy (CAP) and the decouplement from production-based payments. Payments to passive farmers contradict the purpose of the single payment scheme and constitute a great cost for the EU. The new contractual period after 2013 has given rise to discussions on the direction of the CAP with a purpose of increasing the efficiency of the single payment scheme, and reducing passive farming. The aim of the study is to increase the knowledge about a few factors? influence on passive farmers? attitudes towards land use and the CAP.
Hälsoproblem hos strutsfåglar i Sverige : litteraturstudie och sammanställning av patologifynd
In the beginning of the 1990?s ratite breeding for meat production was introduced in many European countries, including Sweden. The knowledge of ostrich farming and diseases of ratites is increasing internationally but is still often limited among veterinarians.
This report consists of a literature study and a summary of pathology findings from ratites submitted for necropsy to the National Veterinary Institute (SVA) in Uppsala, during 1995 to 2001. The purpose is to give a general introduction to ostrich and ratite breeding and to give an overview of the most common diseases.
The necropsy data from 1995 to 2001, indicate that many of the diseases are management related rather than caused by infectious agents. Due to cold climate ostrich breeders in Sweden need to supply well designed buildings and good care of the animal.
Macedonian agriculture : preconditions for development of the agro-sector in Macedonia towards EU accession
The focus of the thesis is: how conditions for agriculture in the Republic of Macedonia today may form the basis for development of the agricultural sector towards conditions needed for future accession into the European Union. The method for investigating this question has been to look at newly available farm monitoring system (FMS) data from Macedonia. Also to look at the latest government policies created in the country for the agricultural sector and rural areas in relation to the requirements for EU accession. Articles and empirical studies published by other authors related to the questions which arise in this study have been reviewed and presented herein. Trade relations, trade patterns and national economic and agricultural trends are displayed to provide a background overview for the study of the agricultural sector.
Naturvärdesbedömning av Utanåfladen; En inventering av vårlekande fisk, bottenfauna och vegetation
There are several thousands shallow bays along the Swedish east coast. Most of them are disturbed by different human activities, and undisturbed bays can be considered as quite unique. In the sheltered shallow bays water warms up more rapidly than adjacent water favoring the growth of vegetation, which in turns is beneficial to spring spawning fish species like perch and pike. It is nowadays more common that coastal habitats are inventoried to facilitate future preservation and planning. The aim of this study was to investigate the shallow bay Utanåfladen (59° 53`31.38 N 19°00`44.90 E) in the north Stockholm archipelago and evaluate its habitat value.
Predation på evertebrater under tidig vår i sjön Tåkern
Benthic invertebrates play important roles as feeding resources for many organisms in different food webs. Shifts in predation of these organisms can generate cascading effects and potentially lead to the disappearance of one or more species from a site. Cascading effects can bring impacts to organisms who aren?t even directly involved, why studies in this field are important for understanding sudden changes in ecosystems. I examined the predation from fish and waterfowl on benthic invertebrates in the shallow and eutrophic Lake Tåkern in the plains of Östergötland County, southern Sweden.