Sökning: "restocking"

Hittade 3 avhandlingar innehållade ordet restocking.

  1. 1. Habitat composition and restocking for conservation of the white-backed woodpecker in Sweden

    Detta är en avhandling från Örebro : Örebro university

    Författare :Kristoffer Stighäll; Örebro universitet.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; White-backed woodpecker; Dendrocopos leucotos; Sweden; deciduous forest; suitable habitat; fragmentation; saproxylic insects; captive breeding; restocking; Biology; Biologi;

    Sammanfattning : In Sweden, intense human land use, especially forestry, has led to profound changes in the landscape over time, especially within the forest ecosystems. A consequence of this is that several specialist species have become endangered. One group of specialists is the woodpeckers. LÄS MER

  2. 2. Conservation Genetics of the Eurasian Otter in Sweden

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Johanna Arrendal; Uppsala universitet.; [2007]
    Nyckelord :Ecology; in situ conservation; individual identification; microsatellites; mtDNA; noninvasive genetic sampling; population dynamics; population size; PVA; restocking; Ekologi; Lutra lutra;

    Sammanfattning : In this thesis, molecular genetic methods were used to study a threatened species, the Eurasian otter. Estimates of population size and population dynamics parameters were obtained, the genetic effects of a restocking program was evaluated, and a population viability analysis was conducted to assess which demographic parameters are most important for the future viability of an otter population. LÄS MER

  3. 3. Large-scale releases of native species the mallard as a predictive model system

    Detta är en avhandling från Umeå : Sveriges Lantbruksuniversitet

    Författare :Pär Söderquist; Högskolan Kristianstad.; Sveriges lantbruksuniversitet.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Human alteration of natural systems, and its consequences are of great concern and the impact on global ecosystems is one of the biggest threats that biodiversity stands before. Translocations of invasive species, as well as intraspecific contingents with non-native genotypes, whether they are deliberate or unintentional, are one such alteration and its consequences are continuously being assessed. LÄS MER