Sökning: "Window trap"

Hittade 5 uppsatser innehållade orden Window trap.

  1. 1. Detection of Pests in Agriculture Using Machine Learning

    Master-uppsats, Linköpings universitet/Institutionen för systemteknik

    Författare :Emma Olsson; [2022]
    Nyckelord :machine learning; svm; sliding window; mask r-cnn; yolov5;

    Sammanfattning : Pest inventory of a field is a way of knowing when the thresholds for pest controlis reached. It is of increasing interest to use machine learning to automate thisprocess, however, many challenges arise with detection of small insects both intraps and on plants. LÄS MER

  3. 2. The effect of ecological forest restoration on bumblebees (Bombus spp.) in the boreal forest

    Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Raisja Spijker; [2018]
    Nyckelord :bumblebee; Bombus spp.; forest restoration; abundance; species richness; species composition; boreal forest;

    Sammanfattning : Insect pollinators are an important part of biodiversity, yet the number of pollinating insects is declining all over the world. Of all the wild plant species about 80% are reliant on insect pollinators, with bees being most important. One of the main causes behind the decline of insect pollinators is the loss and fragmentation of habitats. LÄS MER

  4. 3. Pheromone-based monitoring of Elater ferrugineus as an indicator for species-rich hollow oak stands

    Master-uppsats, SLU/Plant Breeding and Biotechnology (until 121231)

    Författare :Klas Andersson; [2012]
    Nyckelord :Elater ferrugineus; Osmoderma eremita ; saproxylic; indicator ; Quercus sp. ; pheromones; conservation;

    Sammanfattning : The rare beetle Elater ferrugineus was sampled at 47 sites in the county of Östergötland, Sweden by means of pheromone-baited traps to assess its value as an indicator species for hollow oak stands rich in rare saproxylic beetle species. In addition Osmoderma eremita was sampled with the same method. LÄS MER

  5. 4. Påverkar jordbruk flödet av akvatiska insekter till land? : Effekter av jordbruk på akvatiskt tillflöde till land vid norrländska bäckar

    Kandidat-uppsats, Institutionen för ekologi, miljö och geovetenskap

    Författare :Emma Fältström; [2012]
    Nyckelord :Agriculture; Aquatic insects; Aquatic subsidies; North Sweden; Window trap;

    Sammanfattning : Streams and riparian zone are closely linked by reciprocal flows of energy and nutrients. A large part of the transportation from water to land is in form of emerged aquatic insects. Conversion of land from forest to agriculture can greatly affect aquatic ecosystems, and due to the close link, also affect the adjacent terrestral zone. LÄS MER

  7. 5. Biologisk mångfald i små grönområden : Inventering av insekter och fåglar i bebyggda områden i Solna kommun

    Magister-uppsats, Institutionen för naturgeografi och kvartärgeologi (INK)

    Författare :Louise Thylén; [2006]
    Nyckelord :biodiversity; survey; birds; insects; biologisk mångfald; inventering; fåglar; insekter;

    Sammanfattning : All over the world the urbanisation increases at the expense of green areas. Many plants and animals are endangered today because their habitats gets smaller or disappear. The green areas that are left in city centres and suburbs are often small and surrounded by roads and buildings. LÄS MER