Search for dissertations about: "population viability analysis"

Showing result 1 - 5 of 23 swedish dissertations containing the words population viability analysis.

2. 1. Population viability analysis for plants : practical recommendations and applications

   Author : Satu Ramula; Kari Lehtilä; Patrik Dinnétz; Esa Ranta; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; demography; matrix population models; population viability analysis; population growth rate; stochastic models; Biology; Biologi;

   Abstract : Population viability analysis (PVA) is commonly used in conservation biology to predict population viability in terms of population growth rate and risk of extinction. However, large data requirements limit the use of PVA for many rare and threatened species. 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. Population viability analysis under environmental change : development of Bayesian tools

   Author : Alejandro Ruete; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

   Abstract : An understanding of the links between population dynamics and environmental variability, combined with information on how these factors change over time, is necessary to understand and predict population dynamics and viability in changing environments. Scientists need also to acknowledge uncertainties in their understanding of systems, which is straightforward using Bayesian statistics. READ MORE

6. 4. Analytical tools for monitoring and control of fermentation processes

   Author : Heléne Sundström; Sven-Olof Enfors; Carl-Fredrik Mandenius; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Escherichia coli; flow cytometry; software sensors; viability; inclusion bodies; biomass; specific growth rate; stress; population heterogeneity; process analytical technology.; Biochemical process engineering; Biokemisk och bioteknisk processteknik;

   Abstract : The overall objective of this work has been to adopt new developments and techniques in the area of measurement, modelling and control of fermentation processes. Flow cytometry and software sensors are techniques which were considered ready for application and the focus was set on developing tools for research aiming at understanding the relationship between measured variables and process quality parameters. READ MORE

7. 5. Conservation Genetics of the Eurasian Otter in Sweden

   Author : Johanna Arrendal; Mats Björklund; Carles Vilà; Ralph Tiedemann; Uppsala universitet; []
   Keywords : Ecology; in situ conservation; individual identification; microsatellites; mtDNA; noninvasive genetic sampling; population dynamics; population size; PVA; restocking; Ekologi; Lutra lutra;

   Abstract : 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. READ MORE