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Showing result 1 - 5 of 13 essays matching the above criteria.

  1. 1. Ecological impacts of dam removal in Swedish inland waters : Effects on water chemistry and fish demography

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Johanna Ekman; [2023]
    Keywords : biology; ecology; dam removal; Sweden; impact; inland waters; ecosystem; water chemistry; fish demography; Perca fluviatilis; European perch; biologi; ekologi; dammutrivning; Sverige; påverkan; inlandsvatten; ekosystem; vattenkemi; fiskdemografi; Perca fluviatilis; abborre;

    Abstract : Dams play an important role in our society, but their negative impacts on aquatic ecosystems have led to a need for conservation efforts to mitigate the negative effects. In some instances, dam removal has been suggested to be the most economically and ecologically beneficial restoration method to improve longitudinal connectivity. READ MORE

  3. 2. The efficiency of Hyndman-Ullah methods in case of populations with abnormal short-term increases of mortality rates due to wars and pandemics.

    University essay from Mälardalens universitet/Akademin för utbildning, kultur och kommunikation

    Author : Teo Raspudić; [2022]
    Keywords : ;

    Abstract : This report is written with the goal of analyzing the efficiency of the Hyndman-Ullah (HU) and weighted Hyndman-Ullah (wHU) methods when working with the populations that suffered higher mortalities due to the wars and pandemics. Accordingly, the HU and wHU methods are applied to the training sets containing outlying years. READ MORE

  4. 3. Developing new methods for estimating population divergence times from sequence data

    University essay from Uppsala universitet/Institutionen för medicinsk biokemi och mikrobiologi

    Author : Karl Svärd; [2021]
    Keywords : genetics; evolution; bioinformatics; migration; demography; beta distributions; population genetics; numerical methods; simulations; genetik; evolution; bioinformatik; migration; demografi; betafördelning; populationsgenetik; numeriska metoder; simulationer;

    Abstract : Methods for estimating past demographic events of populations are powerful tools in order to get insights of otherwise hidden pasts. The genetic data of people is a valuable resource for these purposes as patterns of variation can inform of the past evolutionary forces and historical events that generated them. READ MORE

  5. 4. Changing patterns of marriage and work in Ireland, 1926-1951

    University essay from Lunds universitet/Ekonomisk-historiska institutionen

    Author : Joseph Aivalikli; [2017]
    Keywords : historical demography; delayed marriage; Ireland; agriculture; Business and Economics;

    Abstract : Marriage is closely tied to economic status, and delayed marriage is often a sign of poor economic conditions for younger people. After a century of decline, marriage rates in Ireland appeared to turn a corner in the 1930s. READ MORE

  6. 5. Germany’s “Open-Door” Policy in Light of the Recent Refugee Crisis : An Interpretive Thematic Content Analysis of Possible Reasons and Underlying Motivations

    University essay from Linköpings universitet/Statsvetenskap

    Author : Claudia Theresia Schmid; [2016]
    Keywords : Germany; Refugee Crisis; Refugee Policy; Open-Door Policy; Reasons; Motivations; Constructivism; Structural Realism; Content Analysis; Thematic Analysis; Themes; Media; Parliamentary Debates;

    Abstract : The aim of this thesis is to examine the medially conveyed open-door refugee policy approach of the German government, in light of the recent refugee crisis in Europe. To gain an understanding of the reasons for this policy approach, a thematic content analysis is carried out, identifying and extracting themes, as portrayed in the national, international media, and political debates in the German Bundestag. READ MORE