| dispersal of introduced house sparrows passer domesticus: an experiment. | an important issue concerning the introduction of non-indigenous organisms into local populations is the potential of the introduced individuals to spread and interfere both demographically and genetically with the local population. accordingly, the potential of spatial dispersal among introduced individuals compared with local individuals is a key parameter to understand the spatial and temporal dynamics of populations after an introduction event. in addition, if the variance in dispersal rate ... | 2007 | 17490946 |
| characterization of avipoxviruses from wild birds in norway. | avipoxviruses from different geographic regions of the world have been characterized to study their genetic and biological properties, but so far, no such work has been performed on norwegian isolates. lesions suggestive of avian pox, found on a norwegian wild sparrow (passer domesticus) and wood pigeon (palumbus palumbus), were obtained in 1972 and 1996, respectively. histologically, these lesions were demonstrated to be characteristic of poxvirus infections and the poxvirus was observed using ... | 2004 | 15188959 |
| genetic variation and structure of house sparrow populations: is there an island effect? | population genetic structure and intrapopulation levels of genetic variation have important implications for population dynamics and evolutionary processes. habitat fragmentation is one of the major threats to biodiversity. it leads to smaller population sizes and reduced gene flow between populations and will thus also affect genetic structure. we use a natural system of island and mainland populations of house sparrows along the coast of norway to characterize the different population genetic ... | 2013 | 23379682 |
| spatial heterogeneity in the effects of climate and density-dependence on dispersal in a house sparrow metapopulation. | dispersal plays a key role in the response of populations to climate change and habitat fragmentation. here, we use data from a long-term metapopulation study of a non-migratory bird, the house sparrow (passer domesticus), to examine the influence of increasing spring temperature and density-dependence on natal dispersal rates and how these relationships depend on spatial variation in habitat quality. the effects of spring temperature and population size on dispersal rate depended on the habitat ... | 2012 | 21613299 |
| steroids in house sparrows (passer domesticus): effects of pops and male quality signalling. | at high trophic levels, environmental contaminants have been found to affect endocrinological processes. less attention has been paid to species at lower trophic levels. the house sparrow (passer domesticus) may be a useful model for investigating effects of pops in mid-range trophic level species. in male house sparrows, ornamental traits involved in male quality signalling are important for female selection. these traits are governed by endocrinological systems, and pops may therefore interfer ... | 2016 | 26789367 |