Search results for "valinta"
showing 9 items of 249 documents
Behavioural, ecological, and evolutionary aspects of diversity in frog colour patterns
2017
The role of colours and colour patterns in behavioural ecology has been extensively studied in a variety of contexts and taxa, while almost overlooked in many others. For decades anurans have been the focus of research on acoustic signalling due to the prominence of vocalisations in their communication. Much less attention has been paid to the enormous diversity of colours, colour patterns, and other types of putative visual signals exhibited by frogs. With the exception of some anecdotal observations and studies, the link between colour patterns and the behavioural and evolutionary ecology of anurans had not been addressed until approximately two decades ago. Since then, there has been eve…
Ultraviolet cues in fruit-frugivore interactions
2002
All diurnal birds studied so far, many reptiles, amphibians, fish and some rodents are able to detect near-ultraviolet light (UV; 320-400 nm) invisible to humans. In many animals, UV cues have been found to play a role in foraging and mate choice. As many fruits reflect UV light, frugivores sensitive to UV may also use these cues in foraging. Fruit colours and their contrast with background coloration may attract frugivores. In this thesis, I studied the fruit colour preferences of both redwings (Turdus iliacus) and small rodents (house mice, Mus musculus and bank vole, Clethrionomys glareolus).
Multimodal Aposematic Signals and Their Emerging Role in Mate Attraction
2018
Chemically defended animals often display conspicuous color patterns that predators learn to associate with their unprofitability and subsequently avoid. Such animals (i.e., aposematic), deter predators by stimulating their visual and chemical sensory channels. Hence, aposematism is considered to be “multimodal.” The evolution of warning signals (and to a lesser degree their accompanying chemical defenses) is fundamentally linked to natural selection by predators. Lately, however, increasing evidence also points to a role of sexual selection shaping warning signal evolution. One of the species in which this has been shown is the wood tiger moth, Arctia plantaginis, which we here put forward…
"Aika moni asia on vaikuttanut mutta lopullinen päätös on oma!" : keskiasteen koulutuspaikan valinta yhdeksäsluokkalaisten kertomana
2004
Ylioppilaskokeen ainereaalista väylä yliopisto-opintoihin: lukion historianopetukselle sille kuuluva arvo.
2013
Assessing foreign language listening comprehension by means of the multiple-choice format : processes and products
2011
Vapaa kouluvalinta Jyväskylässä 1997 : tutkimus yläasteelle siirtyvien koulunvalinnasta
1997
Deciding on the direction of career and life : personal goals, identity development, and well-being during the transition to adulthood
2017
Humans make efforts to manage their lives, and they do this by setting goals and making decisions. When they commit to their decisions, they construct their identity. This research aimed to study young people’s personal goal contents and appraisals, and how these constructs were related to identity and career identity development and subjective well-being. The theoretical basis of this research comprised the life-span model of motivation (Nurmi, 2004; Salmela-Aro, 2009), the conceptualisation of phase- adequate engagement (Dietrich, Parker, & Salmela-Aro, 2012), and the dual-cycle model of identity development (Luyckx, Goossens, Soenens, & Beyers, 2006; Luyckx et al., 2008). The data for th…