Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 4 of 4 for “"Weaverbirds"”.
-
Evolution of colour vision in relation to colouration in weaverbirds (Family Ploceidae) and poison dart frogs (Family Dendrobatidae)
… of colour vision in two separate study systems: weaverbirds (Family Ploceidae) and poison dart frogs (Family Dendrobatidae). In both systems, colouration is used to assess sexual rivals and/or potential mates, making assessing colouration or distinguishing between colours a crucial ability. Both …
-
Adaptive value and development of nest-building in Red Bishops (Euplectes orix)
In some polygynous bird species, e.g. some weaverbirds, male mating success is mainly determined by the number of nests built by a male. In weaverbirds, nest-building is a complex sequential behavioural pattern that needs to be learned in the first two years of life. I analysed what aspects of nest …
-
Patterns of primary moult in the Weavers, Ploceidae
… Ringing Coordinator. May main interest is in the weaverbirds and I have ringed several thousand Southern Masked Weavers Ploceus velatus and many other species. Les Underhill and Walter Zucchini developed a statistical model to analyse timing and duration of primary moult in a standardized way in …
-
Evolutionary genetics of CYP2J19 in red carotenoid pigmentation
… of well-studied seed-eating passerines, the weaverbirds, and demonstrate a direct association between levels of CYP2J19 expression and red ketocarotenoid-based coloration. Next, I consider the evolution of CYP2J19 across multiple avian lineages. I find evidence for positive selection acting …