A morphometric sex determination model for adult greater roadrunners (Geococcyx californianus)
ABSTRACT Little is known of the greater roadrunner's (Geococcyx californianus; roadrunner) ecology and many demographic questions are difficult to answer because of our inability to determine adult bird sex in the field. We collected measurements from live‐captured roadrunners of known sex in F...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-12-01
|
| Series: | Wildlife Society Bulletin |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/wsb.452 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846120183751507968 |
|---|---|
| author | Andrea E. Montalvo Robert A. Powell Michael D. MACdonald Dean Ransom Jr. Roel R. Lopez |
| author_facet | Andrea E. Montalvo Robert A. Powell Michael D. MACdonald Dean Ransom Jr. Roel R. Lopez |
| author_sort | Andrea E. Montalvo |
| collection | DOAJ |
| description | ABSTRACT Little is known of the greater roadrunner's (Geococcyx californianus; roadrunner) ecology and many demographic questions are difficult to answer because of our inability to determine adult bird sex in the field. We collected measurements from live‐captured roadrunners of known sex in Fisher County, Texas, USA, and from roadrunner specimens from museums and university biological collections from 2003 to 2012 to develop a predictive logistic regression model for adult sex determination. We measured 433 adult birds of which 80% (n = 346) were randomly chosen to build potential models. Our best model included the variable estimate bill depth, which was found to be larger in males and correctly classified 80% of the birds. We validated the model with the remaining 20% of measurements (n = 87) and correctly identified the sex of 85% of the birds. Because this model incorporated roadrunners from across their range, it provides an easy, inexpensive, accurate, and field‐relevant methodology for sex determination of adult roadrunners at the point of capture. © 2014 The Wildlife Society. |
| format | Article |
| id | doaj-art-f834a28f959e4a27b90b2fce414b82e0 |
| institution | Kabale University |
| issn | 2328-5540 |
| language | English |
| publishDate | 2014-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Wildlife Society Bulletin |
| spelling | doaj-art-f834a28f959e4a27b90b2fce414b82e02024-12-16T12:55:42ZengWileyWildlife Society Bulletin2328-55402014-12-0138483784110.1002/wsb.452A morphometric sex determination model for adult greater roadrunners (Geococcyx californianus)Andrea E. Montalvo0Robert A. Powell1Michael D. MACdonald2Dean Ransom Jr.3Roel R. Lopez4Department of Wildlife and Fisheries SciencesTexas A&M UniversityCollege StationTX77843USADepartment of Wildlife and Fisheries SciencesTexas A&M UniversityCollege StationTX77843USADepartment of Biological SciencesSan Jose State UniversitySan JoseCA95192USATexas AgriLife Research and Extension CenterSan AngeloTX76901USADepartment of Wildlife and Fisheries SciencesTexas A&M UniversityCollege StationTX77843USAABSTRACT Little is known of the greater roadrunner's (Geococcyx californianus; roadrunner) ecology and many demographic questions are difficult to answer because of our inability to determine adult bird sex in the field. We collected measurements from live‐captured roadrunners of known sex in Fisher County, Texas, USA, and from roadrunner specimens from museums and university biological collections from 2003 to 2012 to develop a predictive logistic regression model for adult sex determination. We measured 433 adult birds of which 80% (n = 346) were randomly chosen to build potential models. Our best model included the variable estimate bill depth, which was found to be larger in males and correctly classified 80% of the birds. We validated the model with the remaining 20% of measurements (n = 87) and correctly identified the sex of 85% of the birds. Because this model incorporated roadrunners from across their range, it provides an easy, inexpensive, accurate, and field‐relevant methodology for sex determination of adult roadrunners at the point of capture. © 2014 The Wildlife Society.https://doi.org/10.1002/wsb.452bill depthdemographicsDNA analysisfield identificationGeococcyx californianusmorphometrics |
| spellingShingle | Andrea E. Montalvo Robert A. Powell Michael D. MACdonald Dean Ransom Jr. Roel R. Lopez A morphometric sex determination model for adult greater roadrunners (Geococcyx californianus) Wildlife Society Bulletin bill depth demographics DNA analysis field identification Geococcyx californianus morphometrics |
| title | A morphometric sex determination model for adult greater roadrunners (Geococcyx californianus) |
| title_full | A morphometric sex determination model for adult greater roadrunners (Geococcyx californianus) |
| title_fullStr | A morphometric sex determination model for adult greater roadrunners (Geococcyx californianus) |
| title_full_unstemmed | A morphometric sex determination model for adult greater roadrunners (Geococcyx californianus) |
| title_short | A morphometric sex determination model for adult greater roadrunners (Geococcyx californianus) |
| title_sort | morphometric sex determination model for adult greater roadrunners geococcyx californianus |
| topic | bill depth demographics DNA analysis field identification Geococcyx californianus morphometrics |
| url | https://doi.org/10.1002/wsb.452 |
| work_keys_str_mv | AT andreaemontalvo amorphometricsexdeterminationmodelforadultgreaterroadrunnersgeococcyxcalifornianus AT robertapowell amorphometricsexdeterminationmodelforadultgreaterroadrunnersgeococcyxcalifornianus AT michaeldmacdonald amorphometricsexdeterminationmodelforadultgreaterroadrunnersgeococcyxcalifornianus AT deanransomjr amorphometricsexdeterminationmodelforadultgreaterroadrunnersgeococcyxcalifornianus AT roelrlopez amorphometricsexdeterminationmodelforadultgreaterroadrunnersgeococcyxcalifornianus AT andreaemontalvo morphometricsexdeterminationmodelforadultgreaterroadrunnersgeococcyxcalifornianus AT robertapowell morphometricsexdeterminationmodelforadultgreaterroadrunnersgeococcyxcalifornianus AT michaeldmacdonald morphometricsexdeterminationmodelforadultgreaterroadrunnersgeococcyxcalifornianus AT deanransomjr morphometricsexdeterminationmodelforadultgreaterroadrunnersgeococcyxcalifornianus AT roelrlopez morphometricsexdeterminationmodelforadultgreaterroadrunnersgeococcyxcalifornianus |