Search for dissertations about: "Reintroduction"

Showing result 1 - 5 of 15 swedish dissertations containing the word Reintroduction.

2. 1. Noble Crayfish (Astacus astacus) in a Changing World : Implications for Management

   Author : Jenny K. M. Zimmerman; Thomas Palo; Nils Ekelund; Jostein Skurdal; Mittuniversitetet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Noble crayfish Astacus astacus ; CPUE; climate change; water regulation; body growth; reintroduction; sustainable fishing; monitoring.;

   Abstract : The noble crayfish (Astacus astacus) is critically endangered in Sweden. This is mainly due to the crayfish plague (Aphanomyces astaci), a lethal disease that, among other things, can be spread through the stocking of fish from contaminated water or contaminated fishing gear. READ MORE

4. 2. Population Dynamics and Conservation of the Sand Lizard (Lacerta agilis) on the Edge of its Range

   Author : Sven-Åke Berglind; Pekka Pamilo; Per Sjögren-Gulve; Coulson Tim; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; demography; extinction; habitat; Lacerta agilis; management; metapopulation; peripheral populations; population dynamics; population viability analysis; reintroduction; reptiles; umbrella species; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

   Abstract : The sand lizard (Lacerta agilis) reaches the northern periphery of its distribution in south-central Sweden, where small, isolated relict populations occur in pine heath forests on sandy sediments. Modern forestry and fire suppression have reduced the amount of suitable open habitat for the species in this area and seem to be important for its decline. READ MORE

5. 3. Food hypersensitivity among schoolchildren : prevalence, Health Related Quality of Life and experiences of double-blind placebo-controlled food challenges

   Author : Åsa Strinnholm; Rönmark Eva; Viveca Lindh; Linnéa Hedman; Inger Kull; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Epidemiology; food-induced symptoms; food-reintroduction; interview;

   Abstract : Background: The prevalence of reported food hypersensitivity among children has increased in Western countries. However, the prevalence varies largely due to differences in methods used in different studies. Double-blind placebo-controlled food challenge (DBPCFC) is the most reliable method to verify or exclude food hypersensitivity. READ MORE

6. 4. Behavioural differences and genetic relationships between four captive populations of red junglefowl (Gallus gallus) : possible implications for conservation

   Author : Jennie Håkansson; Linköpings universitet; []
   Keywords : Red junglefowl; behavioural differences; genetic relationships; captive populations; NATURAL SCIENCES; NATURVETENSKAP;

   Abstract : Conservation of species is to a large extent carried out by zoos where animals are kept in small populations under protected conditions. The ultimate goal of such ex situ conservation programs is to eventually reintroduce the animals into natural habitats to provide support for the survival of the species. READ MORE

7. 5. Interaction strength and responses of ecological communities to disturbances

   Author : Maria Christianou; Bo Ebenman; Peter de Ruiter; Linköpings universitet; []
   Keywords : Species deletion; secondary extinctions; keystone species; keystone links; species reintroductions; Lotka-Volterra models; local stability; permanence; resilience; sensitivity analysis; diversity; complexity; food webs; competition communities; NATURAL SCIENCES; NATURVETENSKAP;

   Abstract : Ecological communities are continuously exposed to natural or anthropogenic disturbances of varied intensity and frequency. The way communities respond to disturbances can depend on various factors, such as number of species, structural characteristics of the community, stability properties, species characteristics and the nature of the disturbance. READ MORE