| long-distance gene flow in a cooperative breeder detected in genealogies of mitochondrial dna sequences. | rates of gene flow among populations of cooperatively breeding birds have been inferred primarily from distributions of observed distances of dispersal from birthplace to place of first breeding. however, for most cooperative breeders, characteristics of geographic population structure and extent of realized gene flow as measured by genetic markers are not known. to estimate rates of gene flow in a cooperatively breeding bird, i conducted a continent-wide survey of dna sequence diversity in the ... | 1993 | 8394578 |
| what determines habitat quality for a declining woodland bird in a fragmented environment: the grey-crowned babbler pomatostomus temporalis in south-eastern australia? | understanding what constitutes high quality habitat is crucial for the conservation of species, especially those threatened with extinction. habitat quality frequently is inferred by comparing the attributes of sites where a species is present with those where it is absent. however, species presence may not always indicate high quality habitat. demographic parameters are likely to provide a more biologically relevant measure of quality, including a species' ability to successfully reproduce. we ... | 2015 | 26098355 |
| demographic effects of habitat restoration for the grey-crowned babbler pomatostomus temporalis, in victoria, australia. | considerable resources are spent on habitat restoration across the globe to counter the impacts of habitat loss and degradation on wildlife populations. but, because of time and resourcing constraints on many conservation programs, the effectiveness of these habitat restoration programs in achieving their long-term goals of improving the population viability of particular wildlife species is rarely assessed and many restoration programs cannot demonstrate their effectiveness. without such demons ... | 2015 | 26177497 |
| the absence of sex-biased dispersal in the cooperatively breeding grey-crowned babbler. | 1. cooperatively breeding birds are thought to be especially vulnerable to habitat fragmentation, in part because dispersal is typically restricted for one sex, increasing the likelihood of inbreeding. knowledge of dispersal is essential to conservation efforts, but is often hampered by our inability to measure its frequency and distance when dispersal is infrequent and difficult to observe. 2. disrupted dispersal is a purported cause of decline in the australian grey-crowned babbler (pomatostom ... | 2011 | 21054379 |
| comparative methods at the species level: geographic variation in morphology and group size in grey-crowned babblers (pomatostomus temporalis). | we show that a new comparative method that sheds light on evolutionary trends among species may also illuminate trends within species. this finding comes from a phylogenetic autocorrelation analysis of morphological traits among individuals sampled from ten populations of a cooperatively breeding songbird, the grey-crowned babbler (pomatostomus temporalis). highly variable mitochondrial dna (mtdna) sequences from both the eastern (pomatostomus temporalis temporalis) and western (pomatostomus tem ... | 1995 | 28568526 |
| mitochondrial gene genealogy and gene flow among island and mainland populations of a sedentary songbird, the grey-crowned babbler (pomatostomus temporalis). | distinguishing between ongoing gene flow and purely historical association of populations can be difficult without data on times of population separation and effective population sizes. to help discriminate between these two scenarios, i examined mitochondrial dna sequence diversity in three geographically close populations of the grey-crowned babbler (pomatostomus temporalis) separated by water barriers of known age in the northern territory, australia, using the polymerase chain reaction (pcr) ... | 1993 | 28564274 |
| environmental versus social factors as determinants of growth in nestlings of a communally breeding bird. | nestlings of the communally breeding greycrowned babbler (pomatostomus temporalis) were studied to discover if supplemental feeding by auxiliary birds at nests enhanced their growth. growth of wing, bill, tarsus and weight was measured. growth curves were fitted by computer using a commercial program (mlab). our data provided little support for possible sibling competition. a significant component of the variance in asymptote and growth constant for some variables could be attributed to differen ... | 1984 | 28311213 |