Sökning: "human ecology"

Visar resultat 1 - 5 av 229 avhandlingar innehållade orden human ecology.

  1. 1. Stopover Ecology of Mallards : Where, when and how to do what?

    Författare :Daniel Bengtsson; Jonas Waldenström; W. Michael Eichholtz; Linnéuniversitetet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Age characters; body condition; departure decision; effects of influenza A virus; habitat selection; mallard; movement; Ottenby Bird Observatory; stopover ecology; weather; wild birds; Ecology; Ekologi;

    Sammanfattning : The mallard (Anas platyrhynchos) is the most numerous and widespread duck in the northern hemisphere and a model species in ecology and harvest management. Migration is a crucial life stage for many birds and understanding the drivers of migration has important implications for conservation biology and assessment of animal population responses to global changes. LÄS MER

  2. 2. Ecology, tourism and management of harbour seals (Phoca vitulina)

    Författare :Sandra M. Granquist; Anders Angerbjörn; Per-Åke Nilsson; Hrefna Sigurjónsdóttir; Arne Bjørge; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Harbour seals; Phoca vitulina; ecology; tourism; wildlife; disturbance; zoologisk ekologi; Animal Ecology;

    Sammanfattning : In cases where human and wildlife are co-using the same geographical areas and resources, management issues often get complex and stakeholder conflicts are common. The Icelandic harbour seal (Phoca vitulina) population is rapidly decreasing, but direct culling of seals still occurs. LÄS MER

  3. 3. Variation in Pseudorchis albida s.l. (Orchidaceae) and Carex capitata s.l. (Cyperaceae) : Morphology, genetic diversity, ecology and systematics

    Författare :Lars-Gunnar Reinhammar; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Ecology; Pseudorchis; Carex; morphologic variation; allozymes; immigration history; regeneration niche; biodiversity; ordinations; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; systematisk botanik; Systematic Botany;

    Sammanfattning : In the Scandinavian flora, several species-pairs where one member is an alpine species andthe other is a closely related lowland species, have been described. The aim of this studywas to investigate two such examples, viz. Pseudorchis albida s.s. LÄS MER

  4. 4. Ecology and control of Anopheles mosquitoes and human malaria in Guinea Bissau, West Africa

    Författare :Katinka Pålsson; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Ecology; Anopheles; Bed nets; Epidemiology; Malaria control; Natural mosquito repellents; Plasmodium; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; Entomology; entomologi;

    Sammanfattning : This thesis analyses the relationship between risk of exposure to infective Anophelesmosquitoes and different environmental factors, in particular house construction, presence ofdomestic animals and house location, in coastal Guinea Bissau, West Africa. The potentialeffect of permethrin-impregnated bed nets on mosquito abundance in bed rooms, and on thePlasmodium parasite prevalence in children was also analysed. LÄS MER

  5. 5. Epidemiology and population structure of Campylobacter jejuni and related organisms in wild birds

    Författare :Jonas Waldenström; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; epidemiology; Campylobacter lari; population structure; Helicobacter canadensis; Ecology; Parasitology human and animal ; Animal ecology; Djurekologi; Parasitologi människa och djur ; migration; Ekologi; wild birds; Sweden; Campylobacter jejuni;

    Sammanfattning : Campylobacter jejuni is one of the most common causes to bacterial gastroenteritis in the industrialised world. Also other species of the Campylobacter genus give rise to human infections. C. jejuni occurs in many different animal hosts and can be isolated from water sources. LÄS MER