Search results for "ravinto"
showing 4 items of 194 documents
Taustamusiikin äänenvoimakkuuden vaikutus asiakkaiden kokemuksiin ravintolan viihtyisyydestä
2012
Tutkimuksessa tarkasteltiin taustamusiikkia ja sen äänenvoimakkuuden yhteyttä ravintolan viihtyisyyteen ja tunnelmaan. Tarkoituksena oli selvittää, onko taustamusiikin äänenvoimakkuudella vaikutusta ravintolan koettuun viihtyisyyteen ja muuttuvatko ravintolan saamat viihtyisyysarviot, jos taustamusiikkia ei ole lainkaan. Lisäksi selvitettiin, onko asiakkaan henkilökohtaisilla ominaisuuksilla, kuten iällä ja sukupuolella, yhteyttä siihen, millaiseksi ravintolan viihtyisyys koetaan taustamusiikin soidessa voimakkaasti tai hiljaa tai kun musiikkia ei ole lainkaan. Tutkimus toteutettiin kyselymenetelmällä, ja aineistoa analysoitiin määrällisin menetelmin. Aineisto muodostui asiakastyytyväisyysk…
Complex plant quality—microbiota–population interactions modulate the response of a specialist herbivore to the defence of its host plant
2022
Many specialist herbivores have evolved strategies to cope with plant defences, with gut microbiota potentially participating to such adaptations. In this study, we assessed whether the history of plant use (population origin) and microbiota may interact with plant defence adaptation. We tested whether microbiota enhance the performance of Melitaea cinxia larvae on their host plant, Plantago lanceolata and increase their ability to cope the defensive compounds, iridoid glycosides (IGs). The gut microbiota were significantly affected by both larval population origin and host plant IG level. Contrary to our prediction, impoverishing the microbiota with antibiotic treatment did not reduce larv…
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).
Does differential iron supply to algae affect Daphnia life history? : An ionome-wide study
2019
The availability of iron (Fe) varies considerably among diet items, as well as ecosystems. Availability of Fe has also changed due to anthropogenic environmental changes in oceanic as well as inland ecosystems. We know little about its role in the nutrition of ecologically important consumers, particularly in inland ecosystems. Physiological studies in several taxa indicate marked effects of dietary Fe on oogenesis. We predicted that differential Fe supply to algae will impact algal Fe concentration with consequences on the life history of the freshwater grazer, Daphnia magna. We found that algal Fe concentration increased with Fe supply, but did not affect algal growth, indicating that the…