| is it benign or is it a pariah? empirical evidence for the impact of the common myna (acridotheres tristis) on australian birds. | there is widespread concern over the impact of introduced species on biodiversity, but the magnitude of these impacts can be variable. understanding the impact of an introduced species is essential for effective management. however, empirical evidence of the impact of an introduced species can be difficult to obtain, especially when the impact is through competition. change in species abundance is often slow and gradual, coinciding with environmental change. as a result, negative impacts on nati ... | 2012 | 22808210 |
| hepatic coccidiosis (eimeria sp) in a wild magpie-lark (grallina cyanoleuca). | marked distension of the bile ducts was associated with various stages of a protozoan life-cycle which were identified as schizogony and gametogony. the bile ducts contained oocysts some of which were sporulated and had four sporocysts, each with two sporozoites, thus conforming to the genus eimeria. this is the first report of a coccidian parasite in the bile duct epithelial cells of birds. it is proposed that this coccidia be named eimeria grallinida ns. | 1989 | 18679867 |
| the function of duetting in magpie-larks: conflict, cooperation, or commitment? | avian duetting is a poorly understood phenomenon despite many hypotheses as to its function. contrary to the recent view that duetting functions for mate guarding and is a result of conflict between the sexes, australian magpie-larks, grallina cyanoleuca, do not use duetting as a paternity guard. i used a playback experiment to investigate the role of antiphonal duetting in territorial defence and pair bond maintenance, two traditional hypotheses about the function of duetting. the experiment sh ... | 2000 | 11082237 |
| isolation and characterization of avipoxviruses from wild birds in western australia. | avipoxviruses were isolated from wart-like lesions in an australian magpie (gymnorhina tibicen) and a silvereye (zosterops lateralis), and the poxvirus aetiology of wart-like lesions in a magpie-lark (grallina cyanoleuca) was confirmed. the three viruses produced typical pock lesions on the chorioallantoic membrane of embryonated eggs and were able to replicate in trypsin-dispersed chick embryo fibroblast cultures but not confluent monolayer cultures. pock neutralization and immunodiffusion stud ... | 1983 | 6307227 |
| metatranscriptomic analysis of virus diversity in urban wild birds with paretic disease. | wild birds are major natural reservoirs and potential dispersers of a variety of infectious diseases. as such, it is important to determine the diversity of viruses they carry and use this information to help understand the potential risks of spillover to humans, domestic animals, and other wildlife. we investigated the potential viral causes of paresis in long-standing, but undiagnosed, disease syndromes in wild australian birds. rna from diseased birds was extracted and pooled based on tissue ... | 2020 | 32581107 |
| deceptive vocal duets and multimodal display in a songbird. | many group-living animals cooperatively signal to defend resources, but what stops deceptive signalling to competitors about coalition strength? cooperative-signalling species include mated pairs of birds that sing duets to defend their territory. individuals of these species sometimes sing 'pseudo-duets' by mimicking their partner's contribution, but it is unknown if these songs are deceptive, or why duets are normally reliable. we studied pseudo-duets in australian magpie-larks, grallina cyano ... | 2017 | 28978738 |
| molecular and morphological analysis of a caryospora-like isolate (apicomplexa: eimeriidae) from the magpie-lark (grallina cyanoleuca) (latham, 1801) in western australia. | a new caryospora-like isolate is described from a magpie-lark (grallina cyanoleuca) in western australia. sporulated oocysts of the caryospora-like isolate (n = 35) are subspherical with a shape index of 1.13 ((21.5 (19.7-23.6) × 19.0 (18.1-19.8) μm). the bilayered oocyst wall is smooth. micropyle, polar granule and oocyst residuum are absent. the sporocyst is ellipsoidal, 18.9 (17.2-20.8) × 12.3 (11.9-12.8) μm, with a shape index (length/width) of 1.54. the sporocyst wall is bilayered. stieda a ... | 2020 | 31754855 |
| molecular characterisation of a novel pathogenic avipoxvirus from an australian passerine bird, mudlark (grallina cyanoleuca). | avipoxviruses have been recognised as significant pathogens in the conservation of numerous bird species. however, the vast majority of the avipoxviruses that infect wild birds remain uncharacterised. here, we characterise a novel avipoxvirus, mudlarkpox virus (mlpv) isolated from an australian passerine bird, mudlark (grallina cyanoleuca). in this study, tissues with histopathologically confirmed lesions consistent with avian pox were used for transmission electron microscopy, and showed charac ... | 2020 | 33385935 |