An intratropical migratory passerine can quickly improve its physiological condition during post migration, reproduction and departure phases on the breeding site in the Cerrado

Pereira, Zélia; Marini, Miguel Ângelo

doi:10.1007/bf03544319

Cited by 5 publications

(3 citation statements)

References 38 publications

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“…We assessed home-range fidelity at the breeding grounds by compiling the recapture coordinates for 3730 Lesser Elaenia individuals, excluding within-year recaptures. We did so using our long-term database (2002 to 2014) that includes banding data from systematic annual netting efforts and banding data after multiple studies developed at our study site, many of them focused on the Lesser Elaenia (e.g., Medeiros & Marini 2007, Machado-Filho et al 2010, Lobo & Marini 2012, Silveira & Marini 2012, Paiva & Marini 2013, Pereira & Marini 2015, Guaraldo et al 2016, Guaraldo et al 2019. We then calculated the approximate distance between the last capture of an individual in a given breeding season and the first recapture in the following year.…”

Section: Study Sitementioning

confidence: 99%

Longitudinal and Cyclic Poleward Migration of a South American Intratropical Migrant Flycatcher, the Lesser Elaenia (Elaenia Chiriquensis)

Guaraldo

2021

Ornitol. Neotrop.

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Research on terrestrial migratory birds is incipient in Brazil. Geolocators have recently allowed tracking small migratory passerines, and such data combined with intrinsic markers such as stable isotopes has become invaluable in revealing migratory behavior. Here we used data from a long-term banding program in a Cerrado reserve in central Brazil where we also deployed geolocators to track adults of a 15g flycatcher, the Lesser Elaenia (Elaenia chiriquensis). The literature defines it as a resident or migrant that may overwinter in the Amazon or Central Brazil. Our general goals were to describe the breeding site fidelity of individuals, their migratory behavior and wintering grounds, thus assessing the migratory connectivity of the studied population. We tagged 40 birds in 2011-2012 and successfully extracted data for three recaptured individuals. We analyzed data using GeoLight and QGIS. Recapture data showed that individuals lived for at least 12yrs and that ~15% of all marked birds returned to a ~200 ± 185m radius from where it was recorded in a previous breeding season. Tracking data revealed low migratory connectivity of the studied population. One individual remained resident. The other two individuals migrated through distinct routes: one made a longitudinal northeast-southwest route and the other a cyclic migration consisting of a poleward section to south Brazil, a NW flight to the Pantanal surroundings and ending with a longitudinal NE spring migration. These are the first detailed data of the migratory movements of individual Lesser Elaenias, supporting its partial rather than obligatory migration in central Brazil. Moreover, we found that migrants overwintered in savanna-like areas, supporting previous studies. We included and discussed a list of hypotheses we expect to guide further studies on this and other intratropical migrant species, thus contributing to improving knowledge on this complex and understudied migratory system.

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Section: Study Sitementioning

confidence: 99%

Longitudinal and Cyclic Poleward Migration of a South American Intratropical Migrant Flycatcher, the Lesser Elaenia (Elaenia Chiriquensis)

Guaraldo

2021

Ornitol. Neotrop.

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“…Esto conlleva a un mayor desgaste del plumaje a lo largo del tiempo de los individuos más jóvenes, lo que puede implicar un mayor gasto energético para realizar las mismas actividades respecto a individuos de plumajes de mejor calidad (Pyle et al 2015, Johnson & Wolfe 2018. Entonces, de acuerdo a su edad y sexo, las aves pueden requerir diferentes gastos energéticos y por ende presentar distinta condición corporal, para llevar a cabo las mismas actividades vitales en un estado fenológico dado (Rosińska 2007, Milenkaya et al 2013, Pereira & Marini 2015.…”

Section: Introductionunclassified

Biometría, condición corporal, estado reproductivo y muda de Tyrannus s. savana en el centro de Argentina

Rebollo

Jahn

Cereghetti³

et al. 2021

Ornitol. Colomb.

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La condición corporal puede influir en diferentes procesos fenológicos que, a su vez, pueden ser desempeñados diferencialmente según la edad y sexo de los individuos. Presentamos la biometría, condición corporal, estado reproductivo y muda de la tijereta sabanera (Tyrannus s. savana), un migrante austral del Neotrópico. En La Pampa, Argentina, de octubre a febrero (2015-2018), realizamos la captura de individuos que fueron anillados y medidos de forma estándar. Ampliamos el rango de peso y cuerda del ala y reportamos por primera vez el largo de tarso y culmen. Como sucede generalmente en paseriformes, las hembras fueron menores a los machos, tanto en el peso de pichones como la cuerda de ala y largo de la cola de adultos. Durante la época reproductiva, mayoritariamente el acúmulo de grasa fue bajo y el desarrollo de la musculatura intermedio, el del parche de incubación alto y el de la cloaca bajo, como en la mayoría de los tiránidos. También, la presencia de muda fue generalmente baja, como se ha documentado previamente, y el desgaste de las remeras y rectrices fue moderado. Asimismo, las características no variaron temporalmente, a excepción del acúmulo de grasa y los desgastes de remeras y rectrices entre los años de las temporadas estudiadas y la disminución del peso y el aumento del desarrollo del parche de incubación con el avance de cada temporada reproductiva. Descripciones como estas son importantes porque existe una gran falta de conocimiento sobre la historia natural de muchas aves del Neotrópico, lo cual limita nuestra capacidad de constatar y frenar la alarmante pérdida de biodiversidad en la región.

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“…Dentro de un mismo estado fenológico, la edad y el sexo de un ave pueden influenciar particularmente su condición corporal, ya que los diferentes procesos fenológicos pueden ser llevados a cabo diferencialmente entre individuos pertenecientes a estos grupos distintivos (Rosińska 2007, Milenkaya et al 2015, Pereira & Marini 2015. En el caso particular de los paseriformes, los individuos dentro de su primer ciclo de vida desarrollan un proceso de muda, denominada muda preformativa, que no presentan el resto de los ciclos anuales subsiguientes, la cual demanda comparativamente un gasto energético adicional (Pyle et al 2015, Johnson & Wolfe 2018.…”

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Body Condition of Breeding Vermilion Flycatchers (Pyrocephalus Rubinus) Varies Between Areas With and Without Cattle Ranching in Central Argentina

et al. 2021

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The body condition of birds may be conditioned by intrinsic (e.g., sex, age, migratory and breeding status) and extrinsic factors, such as anthropic activities (e.g., livestock raising). We describe the biometry and body condition of Vermilion Flycatchers (VEFL) according to sex and age and evaluate which factors best predict their body condition during the breeding season in the Espinal of central Argentina. The study area included “Parque Luro” Provincial Reserve and two nearby private ranches with livestock. We captured and banded VEFL using mist nets between October to February, from 2015 to 2019. We calculated the scaled mass indexes, which relates body mass to biometric measures (culmen, tarsus, and tail length, and wing chord) to choose the best indicator of body condition. As explanatory variables, we used the breeding condition of females in one model, breeding condition of males in another model, and in a final model we used date, year and site, and included all individuals. We banded 93 VEFL that did not vary according to age-dependent body size or reproductive condition. Nevertheless, females weighed more, had higher fat levels and shorter wings than males. The body condition was only explained by breeding site, being smaller in one ranch than the other ranch and the reserve. We highlight the importance of reserves and the need for further research to understand the ecological constraints that South American birds face, to promote their conservation.

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An intratropical migratory passerine can quickly improve its physiological condition during post migration, reproduction and departure phases on the breeding site in the Cerrado

Cited by 5 publications

References 38 publications

Longitudinal and Cyclic Poleward Migration of a South American Intratropical Migrant Flycatcher, the Lesser Elaenia (Elaenia Chiriquensis)

Longitudinal and Cyclic Poleward Migration of a South American Intratropical Migrant Flycatcher, the Lesser Elaenia (Elaenia Chiriquensis)

Biometría, condición corporal, estado reproductivo y muda de Tyrannus s. savana en el centro de Argentina

Body Condition of Breeding Vermilion Flycatchers (Pyrocephalus Rubinus) Varies Between Areas With and Without Cattle Ranching in Central Argentina

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