| Titre : | Emu - Austral Ornithologie 115(4) - 2015 |
| Type de document : | Bulletin |
| Paru le : | 01/11/2015 |
Dépouillements
Article
Joannah Lee, Auteur ;
Lynn Pedler, Auteur ;
Stephen D. Sarre, Auteur ;
James Robertson, Auteur ;
Leo Joseph, Auteur
Sex biases in bird populations, particularly an excess of males, can threaten small, isolated populations by reducing reproductive rates. A skew in sex-ratio can be caused by (i) differential mortality at conception or hatching, (ii) differentia[...]
Article
Ashley Bunce, Auteur
The Great Barrier Reef supports significant breeding populations of tropical seabirds; however, recent evidence has indicated declines in seabird populations across some of the most important breeding sites. Evidence for the cause of these signi[...]
Article
Christine H. Goosem, Auteur ;
David T. Booth, Auteur ;
Gimme H. Walter, Auteur
Most birds breed when food availability is at a maximum. The Logrunner Orthonyx temminckii, a ground-dwelling subtropical insectivore, breeds during the winter-dry season, when its invertebrate prey is believed to be least abundant. We investiga[...]
Article
J. Pedrana, Auteur ;
L. Bernad, Auteur ;
N. O. Maceira, Auteur ;
J. P. Isacch, Auteur
South-eastern South America (SESA) hosts populations of a number of large herbivores, such as the Greater Rhea (Rhea americana). However, the natural grasslands of SESA have been subject to major transformation through agricultural development, [...]
Article
Natalia S. Martínez-Curci, Auteur ;
Adrián B. Azpiroz, Auteur ;
Juan P. Isacch, Auteur ;
Rodolfo Elías, Auteur
Dietary requirements influence the structure of shorebird assemblages, and information on diet is a key to understanding why and when particular species of shorebird use an area and how competition for food might shape their geographical distrib[...]
Article
Rebekah Soanes, Auteur ;
Anne Peters, Auteur ;
Kaspar Delhey, Auteur ;
J. Sean Doody, Auteur
The attributes of a nest-site that a bird selects may be influenced by the potential predator species present, as different types of predator use different foraging strategies and sensory cues to locate nests. However, in many studies of avian n[...]
Article
A. van Doorn, Auteur ;
J. C. Z. Woinarski, Auteur ;
P. A. Werner, Auteur
The western subspecies of the Purple-crowned Fairy-wren (Malurus coronatus coronatus) is listed as vulnerable under Commonwealth and Northern Territory legislation. Declines in numbers are presumed to be due to loss and degradation of riparian h[...]
Article
Elizabeth R. Williams, Auteur ;
Bruce Thomson, Auteur
Site-based population estimates of the threatened Glossy Black-Cockatoo (‘GBC’; Calyptorhynchus lathami) are often calculated based on age and sex details from transect counts. However, these estimates do not distinguish individual birds, which [...]
Article
Daniel Engelhard, Auteur ;
Leo Joseph, Auteur ;
Alicia Toon, Auteur ;
Lynn Pedler, Auteur ;
Thomas Wilke, Auteur
The Galah (Eolophus roseicapilla) is a widespread Australian bird. Its geographical variation and subspecies remain poorly understood. We sampled 192 specimens from across the entire range of the species to assess its phylogeographical structure[...]
Article
Natalia C. García, Auteur ;
Ramiro S. Arrieta, Auteur ;
Cecilia Kopuchian, Auteur ;
Pablo L. Tubaro, Auteur
Behavioural characters that are learned can show temporal variation resulting from changes introduced in new generations during the learning process. The song of the Rufous-collared Sparrow (Zonotrichia capensis) shows significant geographical v[...]
