Resumen. Se sabe que los adultos de varias especies de Paseriformes del oeste de América del Norte migran a la región monzónica de México para mudar desde julio hasta octubre antes de continuar con la migración hacia sus áreas de invernada en el Neotrópico. Sin embargo, se sabe poco sobre la biología y los requerimientos de hábi-tat de estas aves en sus áreas de muda. Por lo tanto, establecimos 13 estaciones de anillado durante las estaciones monzónicas de 2007 y 2008 en el sudeste de Arizona, centro de Sonora y centro de Sinaloa. Estudiamos la ocurrencia espacial y temporal de 10 especies previamente conocidas y de 9 especies nuevas que mudan en los sitios de muda migratoria. En muchas de estas especies, la mayoría o todos los individuos migran hacia sitios en que comienzan la muda, pero en otras, esta migración hacia los sitios de muda parece estar limitada a una proporción pequeña de la población, enfatizando la necesidad de definir la migración para muda al nivel del individuo más que al de la población. Nuestros resultados sugieren que durante la estación monzónica seca de 2007, los migrantes en muda buscaron hábitats ribereños, mientras que en la estación más húmeda de 2008, cuando la expansión de la vegetación fue mayor, éstos estuvieron más ampliamente distribuidos en los hábitats secos. La fidelidad de sitio a las áreas de TEMPORAL, SPATIAL, AND ANNUAL VARIATION IN ThE OCCURRENCE Of MOLT-MIgRANT PASSERINES IN ThE MExICAN MONSOON REgION Variación Temporal, Espacial y Anual en la Presencia de Aves Paseriformes Migratorias durante la Etapa de Muda en la Región Monzónica MexicanaAbstract. Adults of several species of western North American passerines are known to migrate to the Mexican monsoon region to undergo molt from July to October before continuing migration to their wintering grounds in the neotropics, but little is known about the biology and habitat requirements of these birds on their molting grounds. Therefore we established 13 banding stations during the monsoon seasons of 2007 and 2008 in southeastern Arizona, central Sonora, and central Sinaloa. We studied the spatial and temporal occurrence of 10 previously known and 9 new species of molt migrants on the molting grounds. In many of these species most or all individuals appeared to undertake molt migration but in others it appeared to be limited to a small proportion of the population, underscoring that molt migration must be defined at the level of the individual rather than of the population. Our results suggest that during the drier 2007 monsoon season molt migrants sought out riparian habitats, whereas in the wetter 2008 season, when the flush of vegetation was greater, they were more widely distributed in drier habitats. Site fidelity to molting grounds was virtually zero, significantly less than site fidelity to banding stations on breeding and winter grounds. Our results suggest that molt migration to the Mexican monsoon region is a stochastic or plastic process, substantially influenced by individual choices related to variation in weat...
Shorebirds (part of the order Charadriiformes) have a global distribution and exhibit remarkable variation in ecological and behavioural traits that are pertinent to many core questions in the fields of evolutionary ecology and conservation biology. Shorebirds are also relatively convenient to study in the wild as they are ground nesting and often occupy open habitats that are tractable to monitor. Here we present a database documenting the reproductive ecology of 1,647 individually marked snowy plovers (Charadrius nivosus) monitored between 2006 and 2016 at Bahía de Ceuta (23°54N, 106°57W)-an important breeding site in northwestern Mexico. the database encompasses various morphological, behavioural, and fitness-related traits of males and females along with spatial and temporal population dynamics. This open resource will serve as an important data repository for addressing overarching questions in avian ecology and wetland conservation during an era of big data and global collaborative science.
Shorebirds (partim members of order Charadriiformes) have a global distribution and exhibit remarkable variation in ecological and behavioural traits that are pertinent to many core questions in the fields of evolutionary ecology and conservation biology. Shorebirds are also relatively convenient to study in the wild as they are ground nesting and often occupy open habitats that are tractable to monitor. Here we present a database documenting the reproductive ecology of 1,600 individually marked snowy plovers (Charadrius nivosus) monitored between 2006 and 2016 at Bahía de Ceuta (23°54 N, 106°57 W) – an important breeding site in north-western Mexico. The database encompasses various morphological, behavioural, and fitness-related traits of males and females along with spatial and temporal population dynamics. This open resource will serve as an important data repository for addressing overarching questions in avian ecology and wetland conservation during an era of big data and global collaborative science.
In their commentary, Székely et al. (SA) question our publication of a long-term dataset on threatened Snowy Plovers Charadrius nivosus breeding at Bahía de Ceuta, Mexico. The commentary was submitted to Scientific Data but rejected by the editors, who based on the reports of two reviewers concluded that our data descriptor had reasonably acknowledged prior work and was written scientifically ethical and suitable given the limitations of the publication’s format. Most importantly, we note that SA do not raise any fault with the main content of the paper – the data and their accompanying description – providing further assurance that these data can be analysed or reanalysed with confidence. However, SA write that the data descriptor has “omissions and inaccurate statements, and fails to acknowledge key contributions to their project”. We reject these criticisms and maintain that i) we were within our full rights to publish these data and, ii) the data descriptor is accurate.
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