RESUMO
Geographically connected species pairs with weakly differentiated genomes could either represent cases of genomic homogenization in progress or of incipient parapatric speciation. Discriminating between these processes is difficult because intermediate stages of either may produce weakly differentiated genomes that diverge at few locations. We used coalescent modelling applied to a genome-wide sample of SNPs to discriminate between speciation with gene flow and genomic homogenization in two phenotypically distinct but genomically weakly diverged species of elevationally replacing Ramphocelus tanagers, forming a hybrid zone in the Andean foothills. We found overwhelming support for a model of genomic homogenization following secondary contact. Simulating under this model suggested that our species pair was differentiated (FST = 0.30) at secondary contact but that most of the genome has rapidly homogenized during 254 Ky of high gene flow towards the present (FST = 0.02). Despite extensive genome-wide homogenization, plumage remains distinctive with a narrower than expected geographic cline width, indicating divergent selection on colour. We found two SNPs significantly associated with plumage colour, which retain moderately high FST . We conclude that the majority of the genome has fused, but that divergent selection on select loci probably maintains the geographically structured colour differences between these incipient species.
Assuntos
Especiação Genética , Passeriformes , Animais , Fluxo Gênico , Genoma , Genômica , Passeriformes/genéticaRESUMO
En el presente trabajo se da a conocer el avistamiento de un individuo de la paloma picazuró, Patagioenas picazuro en la Reserva Ecológica Taricaya en la zona de amortiguamiento de la Reserva Nacional Tambopata a 26 kilómetros al noreste de la ciudad de Puerto Maldonado en el margen derecho del río Madre de Dios, provincia de Tambopata, departamento de Madre de Dios. Esta observación corresponde al primer registro confirmado para Perú como una especie errante. Es probable que la expansión de esta especie se deba a la deforestación e incremento de zonas de cultivo en la zona.
In this note, I report an observation of one individual of Picazuro Pigeon, Patagioenas picazuro on the right bank of the Madre de Dios River in the Taricaya Ecological Reserve, 26 km northeast of Puerto Maldonado city, province of Tambopata, department of Madre de Dios. This observation is the first confirmed record of P. picazuro for Peru. The presence of P. picazuro in Peru could be due to deforestation and an increase of croplands in the study area.
RESUMO
La certificación como anillador de aves consiste en validar el nivel de conocimiento y experiencia de personas frente a un estándar consolidado de trabajo en el ejercicio de la captura, anillado, manejo, y liberación de aves, con el fin de promover la seguridad del ave, la seguridad del anillador y la calidad de los datos colectados. El Consejo Norteamericano de Anillado (NABC) es una organización sin fines de lucro, engloba a diversas organizaciones de investigación, conservación y gestión de la avifauna en Norteamérica. Continuando con su principal misión de promover prácticas responsables de la técnica del anillado de aves bajo criterios estandarizados y éticos, en un trabajo conjunto con el Centro de Ornitología y Biodiversidad (CORBIDI) y otras instituciones afines, entre el 2017 y el 2018 se han desarrollado las tres primeras sesiones de certificación NABC en el Perú. El presente trabajo intenta responder algunas de las preguntas más frecuentes relacionados con estas sesiones de certificación, así como los esfuerzos del anillado de aves promovidos por el Programa de Anillamiento CORBIDI (PAC).
Certification as bird bander implies to validate the level of knowledge and experience of people with regard to a consolidated standard of work in the exercise of capture, banding, handling, and release of birds, in order to promote the safety of the bird, the security of the bander and the quality of the data collected. The North American Banding Council (NABC) is a non-profit organization that includes diverse organizations of research, conservation and management of North American avifauna. Continuing with its mission to promote responsible bird-banding practices under standardized and ethical criteria, in a joint effort with the Centro de Ornitologia y Biodiversidad (CORBIDI) and other related institutions, the first three NABC certification sessions were recently held in Peru. This work tries to answer some of the most frequent questions related to these certification events and the bird banding efforts promoted by the Programa de Anillamiento CORBIDI (PAC).
RESUMO
Reportamos la presencia del Gorrión de Collar Rufo Zonotrichia capensis por primera vez en los departamen- tos de Loreto y San Martín a 155 y 240 m de altitud respectivamente, la cual corresponde al primer registro confirmado de la especie para la Amazonía peruana. Es posible que la presencia de la especie se deba a la existencia de la carretera que comunica Tarapoto con Yurimaguas, lo que facilitaría la ocupación de la especie por la modificación del paisaje
We report the presence of the Rufous Collared Sparrow Zonotrichia capensis for the first time in the depart- ments of Loreto and San Martín at 155 and 240 m altitude respectively, which corresponds to the first confirmed record of the species for the Peruvian Amazon. It is possible that the presence of the species is due to the existence of the Tarapoto - Yurimaguas road, which would facilitate the occupation of the species by landscape transformation