Search results for "Ornaments"
showing 5 items of 35 documents
Winter male plumage coloration correlates with breeding status in a cooperative breeding species
2007
The function of colored ornaments is usually related to the signaling of individual quality in intra- and intersexual interactions. In cooperative breeding species, where only a fraction of the male population access the breeding status and the other fraction has the option to help breeding pairs, colored traits might provide the females with a reliable information on the quality of potential mate. Males of the cooperative breeding azure-winged magpies (Cyanopica cyanus) display conspicuous blue plumage coloration. Here we explored the role played by structural blue coloration of males and the probability of becoming a breeder or a helper. Birds were trapped during 4 consecutive years, and …
BOTH MALE AND FEMALE SEXUAL ORNAMENTS REFLECT OFFSPRING PERFORMANCE IN A FISH
2010
Secondary sexual characters are often expressed in both sexes (mutual ornamentation), but are less often studied simultaneously. We studied the adaptive signaling function of male and female ornamentation in a mutually ornamented fish, the whitefish Coregonus lavaretus. In an experimental design in which nongenetic environmental effects were minimized, we found that highly ornamented females, males, and their parental combinations had offspring with better swimming performance and predator-avoidance ability than less ornamented individuals or combinations. Furthermore, highly ornamented females had larger offspring that also had higher yolk volume than less ornamented individuals. Offspring…
Ornaments un tā pielietojums grafikas dizainā
2020
Diplomdarba tēma ir “Ornaments un tā pielietojums grafikas dizainā”. Balstoties uz teorētisko un empīrisko pētījumu, darba mērķis ir izveidot spēles maketu, pārveidojot jau esošu galda spēli “level 8”, to latviskojot un mainot tās dizainu, tajā iekļaujot ornamentus. Teorētiskajā daļā aprakstīts ornaments, tā veidi, galvenie uzbūves principi, raksturojums dažādās kultūrās un Latvijā, ornamentu mākslinieki, ornamenta pielietojums grafikas dizainā. Lai veiksmīgi realizētu darba mērķi, balstoties uz teorētisko pētījumu, empīriskajā daļā pēc sešiem kritērijiem tika salīdzinātas un analizētas divdesmit spēles, kuru dizainā izmantots ornaments, kā rezultātā tika noskaidrots kādas ornamenta iezīmes…
Raman Investigations to Identify Corallium rubrum in Iron Age Jewelry and Ornaments
2016
International audience; During the Central European Iron Age, more specifically between 600 and 100 BC, red precious corals (Corallium rubrum) became very popular in many regions, often associated with the so-called (early) Celts. Red corals are ideally suited to investigate several key questions of Iron Age research, like trade patterns or social and economic structures. While it is fairly easy to distinguish modern C. rubrum from bone, ivory or shells, archaeologists are confronted with ancient, hence altered, artifacts. Due to ageing processes, archaeological corals lose their intensive red color and shiny surface and can easily be confused with these other light colored materials. We pr…