Title |
When do young birds disperse? Tests from studies of golden eagles in Scotland
|
---|---|
Published in |
BMC Ecology and Evolution, November 2013
|
DOI | 10.1186/1472-6785-13-42 |
Pubmed ID | |
Authors |
Ewan D Weston, D Philip Whitfield, Justin MJ Travis, Xavier Lambin |
Abstract |
Dispersal comprises three broad stages - departure from the natal or breeding locations, subsequent travel, and settlement. These stages are difficult to measure, and vary considerably between sexes, age classes, individuals and geographically. We used tracking data from 24 golden eagles, fitted with long-lived GPS satellite transmitters as nestlings, which we followed during their first year. We estimated the timing of emigration from natal sites using ten previously published methods. We propose and evaluate two new methods. The first of these uses published ranging distances of parents as a measure of the natal home range, with the requirement that juveniles must exceed it for a minimum of 10 days (a literature-based measure of the maximum time that a juvenile can survive without food from its parents). The second method uses the biggest difference in the proportion of locations inside and outside of the natal home range smoothed over a 30 day period to assign the point of emigration. We used the latter as the standard against which we compared the ten published methods. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
United Kingdom | 4 | 36% |
Nigeria | 1 | 9% |
Brazil | 1 | 9% |
Hong Kong | 1 | 9% |
Unknown | 4 | 36% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 8 | 73% |
Scientists | 2 | 18% |
Practitioners (doctors, other healthcare professionals) | 1 | 9% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Switzerland | 1 | 1% |
Netherlands | 1 | 1% |
France | 1 | 1% |
Mexico | 1 | 1% |
United States | 1 | 1% |
Unknown | 82 | 94% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 19 | 22% |
Student > Master | 16 | 18% |
Other | 7 | 8% |
Researcher | 7 | 8% |
Student > Doctoral Student | 6 | 7% |
Other | 16 | 18% |
Unknown | 16 | 18% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 51 | 59% |
Environmental Science | 16 | 18% |
Biochemistry, Genetics and Molecular Biology | 1 | 1% |
Unknown | 19 | 22% |