Search results for "luu"

Coping styles and adaptation of finnish repatriates : a study of internationally employed finns

1999

Why am I an alien in my own country? : communication problems that Finnish higher education level students encounter when returning to their home cou…

2007

Biological adaptation in light of the Lewontin–Williams (a)symmetry

2022

Neo-Darwinism characterises biological adaptation as a one-sided process, in which organisms adapt to their environment but not vice versa. This asymmetric relationship – here called Williams’ asymmetry – is called into question by Niche Construction Theory, which emphasises that organisms and their environments often mutually affect each other. Here we clarify that Williams’ asymmetry is specifically concerned with (quasi-) directed modifications towards phenotypes that increase individual fitness. This directedness – which drives the adaptive fit between organism and environment – entails far more than the mere presence of cause-effect relationships. We argue that difficulties with invoki…

The evolution of temperature tolerance and invasiveness in a fluctuating thermal environment

2016

The consequences of the climate change on species are still uncertain, despite of intensive research. Currently, rising temperature is not the only concern, since the climate change scenarios also predict increases in the amount of disturbances, such as storms, floods, and thermal fluctuations. Disturbances have also been shown to affect species’ evolution, for example by selecting for traits that are advantageous in fluctuating environments but are also facilitating invasiveness. In this thesis, I study the consequences of evolving in a fluctuating thermal environment by utilizing bacterial microcosms. First I tested the effects of fluctuating vs. constant temperature on the evolution of t…

Realistic genetic architecture enables organismal adaptation as predicted under the folk definition of inclusive fitness

2021

A fundamental task of evolutionary biology is to explain the pervasive impression of organismal design in nature, including traits benefiting kin. Inclusive fitness is considered by many to be a crucial piece in this puzzle, despite ongoing discussion about its scope and limitations. Here we use individual‐based simulations to study what quantity (if any) individual organisms become adapted to maximise when genetic architectures are more or less suitable for the presumed main driver of biological adaptation: namely, cumulative multi‐locus evolution. As an expository device we focus on a hypothetical situation called Charlesworth’s paradox, in which altruism is seemingly predicted to evolve,…

Lähetyslasten sopeutuminen Suomeen : näkökulmina sosiaalinen pääoma, identiteetti, muukalaisuus ja yhteisö

2004

Adaptation of bone to physical activity and diet-induced obesity

2011

Lähden siis iloisin, mutta samalla haikein ja surullisin mielin takaisin "kotiin" : Suomeen paluuprosessi matkalaukkulasten kokemana

2004

Who am i : reconstructing cultural identity upon reentry

2012

The topic of this thesis is reentry adaptation and its effects on an individual’s cultural identity. The purpose of the study is to find out what kinds of problems may arrive during reentry adaptation, how identity is changed as a result of intercultural experiences, as well as what kinds of communication strategies help the entire adaptation process. The aim of the study is to examine what kinds of factors should be taken into account during reentry in order to make it easier on the returnees. In addition the aim is to investigate how individuals are able to comprehend their new cultural identity and in which ways they are able to communicate the possible changes to friends and family at h…

Jokihelmisimpukkapopulaatioiden (Margaritifera margaritifera L.) isäntäspesifisyys

2013

Jokihelmisimpukka (Margaritifera margaritifera L.) eli raakku on yksi kaikkein uhanalaisimmista akvaattisista lajeista Euroopassa. Raakku loisii osan elinkierrostaan lohikaloissa, ja tästä syystä yksityiskohtaista tietoa lajin isäntäspesifisyydestä tarvitaan lajin suojelua varten. Tässä tutkimuksessa tutkittiin kalojen sumputuskokeilla sekä laboratorioaltistuksella, onko raakku sopeutunut eri populaatioissa eri isäntäkaloihin ja onko populaatioissa sopeutumista paikalliseen isäntäpopulaatioon. Lisäksi tutkittiin vierasperäisen puronieriän (Salvelinus fontinalis Mitchill) soveltuvuutta raakkujen isännäksi. Tutkimuspopulaatioiksi valittiin Livojoen raakkupopulaatio, jonka alueella on ennen ve…