Morphological and Genetic Variation Between Migratory and Non-migratory Tropical Kingbirds During Spring Migration in Central South America

Jahn, Alex E.; Levey, Douglas J.; Farias, Izeni Pires; Mamani, Ana María; Vidoz, Julián Quillén; Freeman, Ben

doi:10.1676/09-086.1

Cited by 9 publications

(6 citation statements)

References 18 publications

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“…Jahn, unpublished data). Second, kingbirds that breed further south of the study site likely migrate into the Amazon Basin, north of the study site, to spend the non‐breeding season (Jahn et al. 2010b).…”

Section: Discussionmentioning

confidence: 99%

“…Jahn, unpublished data). Second, kingbirds that breed further south of the study site likely migrate into the Amazon Basin, north of the study site, to spend the non-breeding season (Jahn et al 2010b). Third, rainfall is highest in north-central South America during the southern Amazon Basin's dry season (Garreaud et al 2009), and the abundance of the kingbird's insect prey is positively related to rainfall (Jahn 2009).…”

Section: Discussionmentioning

confidence: 99%

“…A general model for fall migration ( γ” age + sex + mass ) was used to sequentially test the effects of covariates on the following non‐focus parameters: (i) survival (fixed, age, capture, and by season), including the effect of migratory kingbirds not breeding at the site (i.e. transients; these are known to exist, Jahn et al. 2010b); (ii) detectability (fixed, by season, and by sampling effort); and (iii) spring migration (fixed, by year, and by age).…”

Section: Methodsmentioning

confidence: 99%

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Determinants of partial bird migration in the Amazon Basin

Jahn

Levey

Hostetler

et al. 2010

Journal of Animal Ecology

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Summary 1.Little is known about mechanisms that drive migration of birds at tropical latitudes. Because most migratory bird species in South America have populations that are present year-round, partial migration (in which only some individuals of a given population migrate at the end of the breeding season) is likely to be common, providing an opportunity to assess proximate mechanisms of migration. 2. Two non-mutually exclusive hypotheses explaining intraspecific variation in migratory behaviour were tested in a Tropical Kingbird Tyrannus melancholicus population in the southern Amazon Basin, where a dramatic dry season decrease in the abundance of insect food for kingbirds may promote migration of some individuals. 3. The Dominance hypothesis predicts sub-dominant individuals migrate at the end of the breeding season and dominant individuals do not, whereas the Body Size hypothesis predicts smaller individuals migrate and larger individuals do not. 4. Based on 4 years of data on individually-marked birds, strong support was found for occurrence of partial migration in the study population. 5. In the best model, the largest males (which are typically older and dominant to younger individuals) had the highest probability of migrating. Younger females (which are the smallest individuals in the population) were also more likely to migrate than other kingbirds, except the largest males. Thus, an individual's probability of migrating was associated with a more complex interaction of size, age and sex than predicted by current hypotheses. 6. These results suggest that determinants of migratory behaviour differ between North temperate and tropical latitudes. Most tests of partial migration theory have been conducted on granivores (e.g. emberizids) or omnivores (e.g. turdids and icterids) at North temperate latitudes, where seasonality is primarily defined by temperature cycles. In tropical South America, however, the most common long-distance migrants are primarily insectivorous (i.e. tyrannids), and seasonality is largely defined by rainfall cycles. 7. We propose a hypothesis based on seasonal food limitation to explain partial migration of primarily insectivorous species in seasonal tropical habitats.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Determinants of partial bird migration in the Amazon Basin

Jahn

Levey

Hostetler

et al. 2010

Journal of Animal Ecology

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“…Museum records and banding data are restricted to the period between October and March in PR, SC and RS, and in MG, RJ and SP it is centered on September to March, when there are far more records (Belton, 1985;Accordi & Hartz, 2013;SNA, 2016;MZUSP;MPEG). However, the species is recorded all year round in the entire national territory and there is an overlap of resident and migrant populations, whose individuals can be morphologically differentiated by their wings (Jahn et al, 2010). Evidence of breeding activity is available for almost all Brazilian states (SNA, 2016;WikiAves, 2016).…”

Section: Serpophaga Munda (Mpr): Breeds In Argentina Betweenmentioning

confidence: 99%

An overview of migratory birds in Brazil

et al. 2018

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We reviewed the occurrences and distributional patterns of migratory species of birds in Brazil. A species was classified as migratory when at least part of its population performs cyclical, seasonal movements with high fidelity to its breeding grounds. Of the 1,919 species of birds recorded in Brazil, 198 (10.3%) are migratory. Of these, 127 (64%) were classified as Migratory and 71 (36%) as Partially Migratory. A few species (83; 4.3%) were classified as Vagrant and eight (0,4%) species could not be defined due to limited information available, or due to conflicting data.

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“…Not all molecular markers are suitable for the detection of genetic differences in migratory and resident birds [56]. However the choice of suitable genetic markers provides significant insights into the migratory behavior and gene flow among bird populations [17,57].…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity of tufted ducks (Aythya fuligula, Anatidae) in Eastern Europe

Tubelytė

Švažas

Sruoga³

et al. 2011

Open Life Sciences

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The tufted duck (Aythya fuligula, Anatidae) is widespread in the Palaearctic across Northern Eurasia. Birds breeding in Northern and Eastern Europe are highly migratory, while populations from Western Europe are partially migratory or resident. The aim of this study is to explore genetic variation within and between ducks breeding in Latvia and migrants sampled in North West Russia and Belarus. The technique of random amplified polymorphic DNA was applied using five random primers (ol-1, ol-9-12). Genetic variability was measured for all tufted ducks investigated and for different sub-populations from various regions. Individual genetic structure and genetic variability was higher in ducks collected from Latvia. Gene diversity of amplified DNA bands in birds of Latvian origin was 24% with 80% polymorphism. Means of gene diversity and polymorphism for tufted ducks sampled in other countries varied from 12 to 14% and from 27 to 40%, respectively. A high number of unique bands characterized ducks breeding in Latvia. The oligonucleotide primers used in this study were suitable to analyze differences among tufted ducks of different origin. Possible explanations for the variation observed among the studied ducks are discussed.

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Morphological and Genetic Variation Between Migratory and Non-migratory Tropical Kingbirds During Spring Migration in Central South America

Cited by 9 publications

References 18 publications

Determinants of partial bird migration in the Amazon Basin

Determinants of partial bird migration in the Amazon Basin

An overview of migratory birds in Brazil

Genetic diversity of tufted ducks (Aythya fuligula, Anatidae) in Eastern Europe

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