| Titre : | Journal of Field Ornithology 79(1) - MAR 2008 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Garth Herring, Auteur ;
Dale E. Gawlik, Auteur ;
James M. Beerens, Auteur
Waterbird research increasingly involves capturing birds to measure attributes of individuals and for attachment of telemetry devices, but there are few established techniques for capturing wading birds away from their nests. We describe the con[...]
Article
Noninvasive methods of measuring lipid mass in birds are widely used, but not frequently evaluated. I evaluated the ability of three noninvasive indicators of fat content (fat scores, body mass, body mass/wing chord) and regression models to pre[...]
Article
Sarah Pitzer, Auteur ;
Joshua Hull, Auteur ;
Holly B. Ernest, Auteur ;
Angus C. Hull, Auteur
Accurate identification of sex is important for many raptor studies, but may be difficult to determine in the field for some species. Because of size differences between males and females, morphological measurements have often been used to sex r[...]
Article
Susan Prentice, Auteur ;
Andrew P. Jobes, Auteur ;
Gary Burness, Auteur
As bio-indicators, bilateral asymmetry and fault bar formation have been found to be correlated with environmental quality, body condition, and individual fitness. Although commonly used as indices of the same parameters, it is not clear whether[...]
Article
Scott L. Friedman, Auteur ;
Rebecka L. Brasso, Auteur ;
Anne M. Condon, Auteur
The success of ornithological studies often hinges on a researcher's ability to capture individuals quickly and efficiently. Sometimes it is necessary to capture the same individual multiple times, as is the case in many metabolic, ecotoxicologi[...]
Article
Barton J. Paxton, Auteur ;
Bryan D. Watts, Auteur
Currently, a protocol using body mass as the primary criterion for assigning sex of Northern Saw-whet Owls (Aegolius acadicus) is being used by banders. We assessed mass variation of owls using paired measurements of those recaptured (N = 372) d[...]
Article
Lindsay C. Young, Auteur ;
Eric A. Vanderwerf, Auteur
Avian pox virus (Poxvirus avium) is a mosquito-borne disease that occurs worldwide in a variety of bird species, but little is known about its prevalence or effect on seabirds. We monitored prevalence of pox virus and its effect on fledging succ[...]
Article
No other group of North American birds has declined as precipitously and over so large an area as has the grassland assemblage. In the Flint Hills of Kansas, the largest extant region of tallgrass prairie, annual spring burning of rangeland has [...]
Article
Gunnar Thor Hallgrimsson, Auteur ;
Snaebjoern Palsson, Auteur ;
Ron W. Summers, Auteur
Purple Sandpipers (Calidris maritima) are sexually dimorphic, with females larger than males. We tested the reliability of using bill length to sex individuals and estimate the sex ratio at a stopover site in Iceland in May 2003 and 2005. Feathe[...]
Article
Jesse R. Conklin, Auteur ;
Mark A. Colwell, Auteur
Among shorebirds, many individuals make migratory and short-distance movements in large flocks, suggesting that stable social groups may persist within populations for days to months. We examined high-tide associations among individual radio-mar[...]
Article
A pressure-operated drop net was developed to capture endangered Greater Sage-Grouse (Centrocercus urophasianus) in Alberta, Canada. A drop net was developed because other capture methods, such as night lighting and walk-in traps, have largely b[...]
Article
Thais M. Aguilar, Auteur ;
Raphael I. Dias, Auteur ;
Ailton C. Oliveira, Auteur ;
Regina H. Macedo, Auteur
Nest-site choice affects individual fitness and possibly reflects natural selection of the capacity of individuals to select appropriate microhabitat features. From 2003 to 2005, we examined nest-site characteristics and nesting success of Blue-[...]
Article
Despite the interest of resource managers and conservationists in the status of Common Black-Hawk (Buteogallus anthracinus) populations in the southwestern United States, little is known about their nesting success and habitat requirements. Beca[...]
Article
Jose E. I. Gonzalez-Rojas, Auteur ;
Javier Cruz-Nieto, Auteur ;
Irene Ruvalcaba-Ortega, Auteur ;
Miguel A. Cruz-Nieto, Auteur
Eared Quetzals (Euptilotis neoxenus), a threatened species, are one of the least studied trogons in Mexico. We monitored 29 Eared Quetzal nests in the Chihuahuan portion of the Sierra Madre Occidental from 1998 to 2003. All nests were in tree ca[...]
Article
Paul H. Klatt, Auteur ;
Bridget J. M. Stutchbury, Auteur ;
Melissa L. Evans, Auteur
Incubation feeding, where males feed their mates, is a common behavior in birds and may improve female condition, nest attentiveness, and nesting success. We used behavioral observations and a temporary mate removal experiment to test the female[...]
