| Titre : | Journal of Field Ornithology 79(3) - SEP 2008 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Carlos D. Santos, Auteur ;
Pedro M. Lourenço, Auteur ;
Ana C. Miranda, Auteur ;
José P. Granadeiro, Auteur ;
Jorge M. Palmeirim, Auteur
The ability of investigators to study the behavior of animals at night is often limited by the difficulties of making observations in the dark, particularly at a distance. Indirect techniques, such as radio tracking, generally produce limited be[...]
Article
Keith P. Barnes, Auteur ;
James R. Belthoff, Auteur
Broadcasts of conspecific vocalizations are used to increase detection rates on surveys of secretive bird species, yet the assessment of detectability necessary to fully interpret such survey data is frequently lacking. We used radiotelemetry to[...]
Article
Tyler L. Lewis, Auteur ;
Paul L. Flint, Auteur
Of the transmitter attachment techniques for birds, the subcutaneous anchor provides a secure attachment that yields relatively few secondary effects. However, the use of subcutaneous anchors has been limited by transmitter size and retention ti[...]
Article
David N. Bonter, Auteur ;
Elizabeth W. Brooks, Auteur ;
Therese M. Donovan, Auteur
Mist nets deployed in a standard ground-level fashion capture birds approximately 0.5-2.6 m above the ground. In habitats where the vegetation extends above this height, standard mist net deployment may inadequately sample the targeted avian com[...]
Article
Leandro Bugoni, Auteur ;
Tatiana S. Neves, Auteur ;
Fabiano V. Peppes, Auteur ;
Robert W. Furness, Auteur
Most studies of seabirds that involve trapping and marking birds are carried out at breeding colonies. This bias toward the breeding period and colony-based research is partially caused by difficulties in capturing birds at sea. From 2005 to 200[...]
Article
Andrew K. Davis, Auteur ;
Nora E. Diggs, Auteur ;
Robert J. Cooper, Auteur ;
Peter P. Marra, Auteur
Radio-telemetry is often used to track birds, and several investigators have examined the possible effects of radio-transmitters on birds. One approach to this question is to determine if transmitters induce physiological stress. Using hematolog[...]
Article
Kyle H. Elliott, Auteur ;
Gail K. Davoren, Auteur ;
Anthony J. Gaston, Auteur
Although many studies involve observations of parent birds feeding their young, few investigators have attempted to quantify possible sources of bias associated with such observations. To address this issue, we observed the provisioning behavior[...]
Article
Kara J. Gebhardt, Auteur ;
Lisette P. Waits, Auteur
Molted feathers are becoming increasingly important as a source of DNA for identifying the sex of individuals, and accurate methods for molecular sex identification are needed. Three molecular sex identification primer sets have been developed f[...]
Article
Walter D. Koenig, Auteur ;
Douglas J. Schaefer, Auteur ;
Stefania Mambelli, Auteur ;
Todd E. Dawson, Auteur
The diet of Acorn Woodpeckers (Melanerpes formicivorus) in central coastal California consists of a mixture of high-quality (insects) and low-quality (stored acorns) food during the spring breeding season. We used stable isotope ratios obtained [...]
Article
The value of egg coloration as crypsis, once accepted as a general principle, has recently been questioned because most experiments have failed to show that egg coloration deters predation. The nest-crypsis hypothesis postulates that, among spec[...]
Article
To clarify the underlying causes of the species-area relationship in marsh-nesting birds, I studied eight freshwater tidal marshes of the Connecticut River that differed in area, degree of isolation, mudflat cover, water cover, tidal regime, and[...]
Article
Ken Yasukawa, Auteur ;
Jody Urish, Auteur ;
Alan Her, Auteur ;
Erin Light, Auteur
Although individually distinct begging calls may permit parents to recognize their offspring, birds nesting in dense breeding colonies where fledglings intermingle might benefit from additional adaptations. For example, if the calls of all nestl[...]
Article
Octavio R. Rojas-Soto, Auteur ;
Enrique Martinez-Meyer, Auteur ;
Adolfo G. Navarro-Sigüenza, Auteur ;
Adan Oliveras de Ita, Auteur ;
Hector Gomez de Silva, Auteur ;
A. Townsend Peterson, Auteur
Sierra Madre Sparrows (Xenospiza baileyi) are among the least known of all bird species in Mexico. Recent surveys have discovered previously unknown populations and the current known distribution of Sierra Madre Sparrows consists of two populati[...]
Article
C. Dustin Becker, Auteur ;
Thomas M. Loughin, Auteur ;
Tatiana Santander, Auteur
Large-scale transformation of forested landscapes is a major factor in loss of biological diversity in the American tropics. Investigators examining the responses of species to deforestation rarely control for variation in the amount of forest r[...]
