Search for dissertations about: "songbirds"
Showing result 1 - 5 of 14 swedish dissertations containing the word songbirds.
-
1. MHC diversity and expression in a songbird : Temporal and transgenerational variation
Abstract : The immune system is of central importance to clear-off pathogens in order to keep an organism healthy. In vertebrates, the Major Histocompatibility Complex (MHC) is a genomic region that holds key genes involved in adaptive immunity and in particular in the antigen presenting process. READ MORE
-
2. Evolution of sex chromosomes in Sylvioidea songbirds
Abstract : Sex chromosomes were discovered more than 100 years ago. They have been studied intensely from a theoretical perspective since then, giving rise to a large body of testable predictions about their evolution from autosomes. READ MORE
-
3. Stopover behaviour in migratory songbirds: timing, orientation and departures
Abstract : Songbird migrants use stopovers between flight bouts to rest and refuel for the upcoming flights. Behaviours affecting where, when and how long to stay at stopover sites will affect how successful the overall migration will be, which has significant consequences for the overall fitness and mortality of the birds. READ MORE
-
4. Genomic studies of sex differences : On mutations, recombination, and sexual antagonism in songbirds
Abstract : Many organisms have separate sexes, i.e., males and females. The presence of separate sexes causes sex-specific selection regimes and sexual antagonism, which can lead to sex differences in morphology, physiology, and behaviours. READ MORE
-
5. Plumage Colours and the Eye of the Beholder : The Ecology of Colour and its Perception in Birds
Abstract : Virtually all diurnal birds have tetrachomatic vision based on four different colour receptors. As a result, birds are potentially able to perceive their environment in twice as many colours as humans and four times as many colours compared to most other mammals, which are dichromatic. READ MORE