Portal de Periódicos da CAPES

Using interpubic distance for sexing manakins in the field

2010; Association of Field Ornithologists; Volume: 81; Issue: 1 Linguagem: Inglês

10.1111/j.1557-9263.2009.00260.x

1557-9263

Chase D. Mendenhall, Çağan H. Şekercioğlu, Federico Oviedo Brenes,

Wildlife Ecology and Conservation

Journal of Field OrnithologyVolume 81, Issue 1 p. 49-63 Using interpubic distance for sexing manakins in the field Uso de la distancia interpúbica para distinguir el sexo de los pipridos en el campo Chase D. Mendenhall, Corresponding Author Chase D. Mendenhall 369 Banbury Road, Oxford OX2 7RA, United Kingdom Corresponding author. Email: cdm@stanford.eduSearch for more papers by this authorCagan H. Sekercioglu, Cagan H. Sekercioglu Center for Conservation Biology, Department of Biology, 385 Serra Mall, Stanford University, Stanford, California 94305, USASearch for more papers by this authorFederico Oviedo Brenes, Federico Oviedo Brenes Organization for Tropical Studies, Las Cruces Biological Station, Apartado 73-825, San Vito, Coto Brus, Costa RicaSearch for more papers by this author Chase D. Mendenhall, Corresponding Author Chase D. Mendenhall 369 Banbury Road, Oxford OX2 7RA, United Kingdom Corresponding author. Email: cdm@stanford.eduSearch for more papers by this authorCagan H. Sekercioglu, Cagan H. Sekercioglu Center for Conservation Biology, Department of Biology, 385 Serra Mall, Stanford University, Stanford, California 94305, USASearch for more papers by this authorFederico Oviedo Brenes, Federico Oviedo Brenes Organization for Tropical Studies, Las Cruces Biological Station, Apartado 73-825, San Vito, Coto Brus, Costa RicaSearch for more papers by this author First published: 22 February 2010 https://doi.org/10.1111/j.1557-9263.2009.00260.xCitations: 4Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstracten ABSTRACT Field methods for determining the sex of birds are often limited due to morphometric overlap between sexes, intermediate plumages, seasonality, and reliance on subjective age classification. Interpubic distance, characterized in birds as the distance between the distal ends of the pubic bones, has not been formally tested as a method for determining the sex of birds, despite references among parrot breeders and the frequent use of analogous measurements in mammals. We developed a harmless and easily performed field method for measuring interpubic distance in studies involving bird capture, and compared the interpubic distances of known sex White-ruffed Manakins (Corapipo altera), Orange-collared Manakins (Manacus aurantiacus), and Blue-crowned Manakins (Lepidothrix coronata) to evaluate the possible use of this measurement to determine sex. Using interpubic distance ranges based on 85% confidence intervals where overlap existed between sexes, the sex of 92.8–100% of all manakins in our study was accurately determined with no misclassification. Interpubic distance performed better than plumage-based methods that sexed 74.0% of all individuals and misclassified 1.5%. Using linear discriminant analysis, we developed classification equations that allowed us to accurately determine the sex of all individuals with 100% accuracy using mass and interpubic distance. Additionally, we compared the interpubic distances of female White-ruffed Manakins to evaluate the potential to determine age and reproductive status. Despite an apparent relationship between interpubic distance, age and reproductive status, we concluded that interpubic distance has limited use for determining age and reproductive status due to extensive overlap (31.6–100%), but shows potential in other applications. Based on these results, we endorse the use of interpubic distance to determine the sex of manakins. We encourage further study to develop additional classification equations using different morphometric measurements and to test the efficacy of interpubic distance to determine sex in other bird species. RESUMENes Los métodos del campo para distinguir el sexo de aves son limitados a causa de traslapes de medidas mórfometricas extremas entre sexos, plumajes intermedios, diferencias temporales y/o dependencia en clasificación sujeto de la edad. Distancia interpúbica, caracterizada en aves como la distancia entre los puntos distales de los huesos púbicos, no ha sido formalmente probada como un método para distinguir el sexo de las aves, a pesar de referencias por criadores de loros y uso de métodos similares en mamíferos. Diseñamos un método del campo rápido y sencillo que no tiene riesgo del daño para sacar la distancia interpúbica en estudios que capturan aves. Comparamos la distancia interpúbica de individuos de sexo conocido de Corapipo altera, Manacus aurantiacus, y Lepidothrix coronata para probar el método. Clasificamos correctamente el sexo de 92.8–100% de todos los individuos en este estudio por rangos determinados a través de intérvalos de confianza de 85%. La distancia interpúbica funcionó mejor que un método basado en plumaje, el cual que distinguió el sexo correcto de 74.0% pero falló en clasificar el sexo de 1.5% de los individuos estudiados. Usamos el análisis de discriminación linear para determinar el poder predictivo de la distancia interpúbica, longitud del ala y masa e hicimos ecuaciones de clasificación que distinguieron sexo con un 100% de éxito usando solo masa y distancia interpúbica. Además, comparamos distancia interpúbica de las hembras de C. altera para evaluar el potencial de distinguir edad y estadio reproductivo. A pesar de existir una conexión entre distancia interpúbica, edad y estadio reproductivo, concluimos que la distancia interpúbica es limitada en el contexto de distinguir edad y estadio reproductivo por traslape extensivo (31.6–100%), pero muestra potencial en otras aplicaciones. Basados en estos resultados recomendamos el uso de distancia interpúbica como un método para distinguir sexo de pipridos. Recomendamos más investigación para crear otras ecuaciones de clasificación usando medidas mórfometricas diferentes y probar la eficacia de la distancia interpúbica para distinguir el sexo de otras especies de aves. Citing Literature Volume81, Issue1March 2010Pages 49-63 RelatedInformation