| behavioural determination of the contrast sensitivity function of the eagle aquila audax. | | 1981 | 7269303 |
| spatial visual acuity of the eagle aquila audax: a behavioural, optical and anatomical investigation. | behavioural acuity of the wedge-tailed eagle was determined across a range of luminance. maximum acuity is between 132 and 143 c/deg and with decreasing luminance acuity declines sharply. the maximum anatomical resolving power of the eagle's deep fovea was calculated as 140 c/deg. this calculation was based upon ophthalmoscopic measurement of posterior nodal distance and estimates of photoreceptor spacings made from fixed foveal tissue and corrected for shrinkage. maximum behavioural acuity and ... | 1985 | 4090282 |
| the endocrine pancreas in the australian wedge-tailed eagle (aquila audax)--an immunocytochemical study. | the endocrine pancreas of the australian wedge-tailed eagle, aquila audax, was investigated by means of immunocytochemistry using the pap method at the light microscopic level. serial paraffin sections were stained with haematoxylin and eosin, aldehyde fuchsin, and grimelius' silver impregnation method in each of the lobes-dorsal, ventral, third and splenic lobes to show the morphology of the islet, b cells, and a cells respectively. the islets were of the 'mixed type' with no segregation into ' ... | 1993 | 7693059 |
| did postglacial sea-level changes initiate the evolutionary divergence of a tasmanian endemic raptor from its mainland relative? | populations on continental islands are often distinguishable from mainland conspecifics with respect to body size, appearance, behaviour or life history, and this is often congruent with genetic patterns. it is commonly assumed that such differences developed following the complete isolation of populations by sea-level rise following the last glacial maximum (lgm). however, population divergence may predate the lgm, or marine dispersal and colonization of islands may have occurred more recently; ... | 2013 | 24174114 |
| high frequency of lead exposure in the population of an endangered australian top predator, the tasmanian wedge-tailed eagle (aquila audax fleayi). | lead poisoning, mainly through incidental ingestion of lead ammunition in carcasses, is a threat to scavenging and predatory bird species worldwide. in australia, shooting for animal control is widespread, and a range of native scavenging species are susceptible to lead exposure. however, the prevalence of lead exposure in australia's scavenging and predatory birds is largely unknown. we evaluated the degree to which the tasmanian wedge-tailed eagle (aquila audax fleayi), an endangered australia ... | 2020 | 33090553 |
| completing a worldwide picture: preliminary evidence of lead exposure in a scavenging bird from mainland australia. | lead toxicity from ammunition has been shown to be a threat to scavenging birds across the globe. despite decades of research in europe, north and south america, asia and africa, there have been no studies to investigate this phenomenon in australia despite that continent having many species of scavenging birds and widespread shooting practices. we present preliminary evidence of lead exposure in australia's largest bird of prey, the wedge-tailed eagles (aquila audax) through analysis of bone an ... | 2020 | 31837857 |