scholarly journals Correction to ‘Migration and the evolution of sexual dichromatism: evolutionary loss of female coloration with migration among wood-warblers’

2017 ◽  
Vol 284 (1858) ◽  
pp. 20171145
Author(s):  
Richard K. Simpson ◽  
Michele A. Johnson ◽  
Troy G. Murphy
Keyword(s):  
Sexual Dichromatism ◽  
Wood Warblers ◽  
Female Coloration

scholarly journals Migration and the evolution of sexual dichromatism: evolutionary loss of female coloration with migration among wood-warblers

2015 ◽  
Vol 282 (1809) ◽  
pp. 20150375 ◽  
Author(s):  
Richard K. Simpson ◽  
Michele A. Johnson ◽  
Troy G. Murphy
Keyword(s):  
Sexual Selection ◽  
Sexual Dichromatism ◽  
Ancestral State ◽  
Migration Distance ◽  
Female Ornamentation ◽  
Wood Warblers ◽  
Selection For ◽  
Evolution Of Migration ◽  
And Migration ◽  
Female Coloration

The mechanisms underlying evolutionary changes in sexual dimorphism have long been of interest to biologists. A striking gradient in sexual dichromatism exists among songbirds in North America, including the wood-warblers (Parulidae): males are generally more colourful than females at northern latitudes, while the sexes are similarly ornamented at lower latitudes. We use phylogenetically controlled comparative analysis to test three non-mutually exclusive hypotheses for the evolution of sexual dichromatism among wood-warblers. The first two hypotheses focus on the loss of female coloration with the evolution of migration, either owing to the costs imposed by visual predators during migration, or owing to the relaxation of selection for female social signalling at higher latitudes. The third hypothesis focuses on whether sexual dichromatism evolved owing to changes in male ornamentation as the strength of sexual selection increases with breeding latitude. To test these hypotheses, we compared sexual dichromatism to three variables: the presence of migration, migration distance, and breeding latitude. We found that the presence of migration and migration distance were both positively correlated with sexual dichromatism, but models including breeding latitude alone were not strongly supported. Ancestral state reconstruction supports the hypothesis that the ancestral wood-warblers were monochromatic, with both colourful males and females. Combined, these results are consistent with the hypotheses that the evolution of migration is associated with the relaxation of selection for social signalling among females and that there are increased predatory costs along longer migratory routes for colourful females. These results suggest that loss of female ornamentation can be a driver of sexual dichromatism and that social or natural selection may be a stronger contributor to variation in dichromatism than sexual selection.

scholarly journals Female Song Occurs in Songbirds with More Elaborate Female Coloration and Reduced Sexual Dichromatism

2016 ◽  
Vol 4 ◽  
Author(s):  
Wesley H. Webb ◽  
Dianne H. Brunton ◽  
J. David Aguirre ◽  
Daniel B. Thomas ◽  
Mihai Valcu ◽  
...  
Keyword(s):  
Sexual Dichromatism ◽  
Female Song ◽  
Female Coloration

Natural and sexual selection shape the evolution of colour and conspicuousness in North American wood-warblers (Parulidae)

2020 ◽  
Vol 130 (1) ◽  
pp. 89-100 ◽  
Author(s):  
Richard K Simpson ◽  
Allison F Mistakidis ◽  
Stéphanie M Doucet
Keyword(s):  
Sexual Selection ◽  
Environmental Variation ◽  
Upper Body ◽  
Body Regions ◽  
Visual Models ◽  
Wood Warblers ◽  
Visual Background ◽  
Selective Forces ◽  
Natural And Sexual Selection ◽  
Female Coloration

Abstract Natural and sexual selection drive colour evolution in animals. However, these different selective forces are often studied independently or without considering environmental variation. We evaluated the roles of natural and sexual selection together on colour evolution in 15 sympatric wood-warbler species, while considering the influence of variation in the light environment and visual background. We tested the influence of each selective pressure on male and female coloration and contrast against the background using avian visual models in phylogenetically controlled analyses. We found natural and sexual selection simultaneously driving cryptic and conspicuous plumage in males by acting on different body regions. For example, we found that ground-nesting species had males with conspicuous under-body plumage and cryptic upper-body plumage, showing how natural and sexual selection can drive colour evolution concordantly. We also found interesting relationships with female plumage, such as nest predation positively covarying with female contrast against the background, suggesting a cost to female conspicuousness. Our findings here showcase the complexity of selection on coloration and illustrate the importance of: (1) accounting for environmental variation when assessing how natural and sexual selection drive colour evolution; and (2) testing how multiple selection pressures are shaping colour diversity among species.

scholarly journals EVOLUTION OF SEXUAL DICHROMATISM. 1. CONVERGENT LOSSES OF ELABORATE FEMALE COLORATION IN NEW WORLD ORIOLES (ICTERUSSPP.)

The Auk ◽  
2008 ◽  
Vol 125 (4) ◽  
pp. 778-789 ◽  
Author(s):  
CHRISTOPHER M. HOFMANN ◽  
THOMAS W. CRONIN ◽  
KEVIN E. OMLAND
Keyword(s):  
New World ◽  
Sexual Dichromatism ◽  
Female Coloration

scholarly journals Geolocators reveal migration routes, stopover sites, and nonbreeding dispersion in a population of Cerulean Warblers

2020 ◽  
Vol 7 (1) ◽  
pp. 19-26
Author(s):  
Clayton D Delancey ◽  
Kamal Islam ◽  
Gunnar R Kramer ◽  
Garrett J MacDonald ◽  
Alexander R Sharp ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Spring Migration ◽  
Autumn Migration ◽  
Migration Routes ◽  
Neotropical Migrant ◽  
Wood Warblers ◽  
Before And After ◽  
The Caribbean ◽  
Declining Species ◽  
Cerulean Warblers

AbstractCerulean Warblers (Setophaga cerulea) are among the fastest declining Nearctic-Neotropical migrant wood-warblers (Parulidae) in North America. Despite ongoing conservation efforts, little is known about their non-breeding distribution. In June 2016-2018, we deployed geolocators (n = 30) on adult male Cerulean Warblers in Indiana, USA, to track annual movements of individuals. Recovered geolocators (n = 4) showed that Cerulean Warblers occurred broadly throughout northern South America. Autumn migration lasted 44-71 days (n = 4), whereas spring migration lasted 37-41 days (n = 3). The average migration distance was 5268 km. During autumn migration, Cerulean Warblers made 1-4 stopovers (i.e., ≥2 days; n = 4) and 1-2 stopovers during spring migration (n = 3). When crossing the Gulf of Mexico during autumn migration, two birds stopped over after crossing, but not beforehand. Two others navigated through the Caribbean rather than crossing the Gulf of Mexico. During spring migration, one individual stopped after crossing, one individual stopped before crossing, and one individual stopped before and after crossing the Gulf of Mexico. No birds migrated through the Caribbean Islands during spring migration. These results represent novel information describing annual movements of individual Cerulean Warblers and will inform conservation efforts for this declining species.

scholarly journals Ancestry and evolution of seasonal migration in the Parulidae

2011 ◽  
Vol 279 (1728) ◽  
pp. 610-618 ◽  
Author(s):  
Benjamin M. Winger ◽  
Irby J. Lovette ◽  
David W. Winkler
Keyword(s):  
Phylogenetic Signal ◽  
Rapid Change ◽  
Large Family ◽  
Seasonal Migration ◽  
Ancestral State ◽  
Migratory Behaviour ◽  
Wood Warbler ◽  
Wood Warblers ◽  
History Of ◽  
The Tropics

Seasonal migration in birds is known to be highly labile and subject to rapid change in response to selection, such that researchers have hypothesized that phylogenetic relationships should neither predict nor constrain the migratory behaviour of a species. Many theories on the evolution of bird migration assume a framework that extant migratory species have evolved repeatedly and relatively recently from sedentary tropical or subtropical ancestors. We performed ancestral state reconstructions of migratory behaviour using a comprehensive, well-supported phylogeny of the Parulidae (the ‘wood-warblers’), a large family of Neotropical and Nearctic migratory and sedentary songbirds, and examined the rates of gain and loss of migration throughout the Parulidae. Counter to traditional hypotheses, our results suggest that the ancestral wood-warbler was migratory and that losses of migration have been at least as prevalent as gains throughout the history of Parulidae. Therefore, extant sedentary tropical radiations in the Parulidae represent losses of latitudinal migration and colonization of the tropics from temperate regions. We also tested for phylogenetic signal in migratory behaviour, and our results indicate that although migratory behaviour is variable within some wood-warbler species and clades, phylogeny significantly predicts the migratory distance of species in the Parulidae.

Cryptic sexual dichromatism occurs across multiple types of plumage in the Green-backed Tit Parus monticolus

Ibis ◽  
2006 ◽  
Vol 149 (2) ◽  
pp. 264-270 ◽  
Author(s):  
CHRISTOPHER HOFMANN ◽  
WEN-SUI LO ◽  
CHENG-TE YAO ◽  
SHOU-HSIEN LI
Keyword(s):  
Sexual Dichromatism

scholarly journals A wood-warbler produced through both interspecific and intergeneric hybridization

2018 ◽  
Vol 14 (11) ◽  
pp. 20180557 ◽  
Author(s):  
David P. L. Toews ◽  
Henry M. Streby ◽  
Lowell Burket ◽  
Scott A. Taylor
Keyword(s):  
Intergeneric Hybridization ◽  
Population Declines ◽  
Morphometric Traits ◽  
Early Generation ◽  
Phenotypic Differences ◽  
Vermivora Chrysoptera ◽  
Hybridization Event ◽  
Wood Warblers ◽  
Declining Populations ◽  
Female Hybrid

Hybridization between divergent taxa can provide insight into the breakdown of characters used in mate choice, as well as reproductive compatibility across deep evolutionary timescales. Hybridization can also occur more frequently in declining populations, as there is a smaller pool of conspecific mates from which to choose. Here, we report an unusual combination of factors that has resulted in a rare, three-species hybridization event among two genera of warblers, one of which is experiencing significant population declines. We use bioacoustic, morphometric and genetic data, to demonstrate that an early generation female hybrid between a golden-winged warbler ( Vermivora chrysoptera ) and a blue-winged warbler ( V. cyanoptera ) went on to mate and successfully reproduce with a chestnut-sided warbler ( Setophaga pensylvanica ) . We studied the product of this event—a putative chrysoptera × cyanoptera × pensylvanica hybrid—and show that this male offspring sang songs like S. pensylvanica , but had morphometric traits similar to Vermivora warblers. The hybrid's maternal parent had V. chrysoptera mitochondrial DNA and , with six plumage-associated loci, we predicted the maternal parent's phenotype to show that it was likely an early generation Vermivora hybrid . That this hybridization event occurred within a population of Vermivora warblers in significant decline suggests that females may be making the best of a bad situation, and that wood-warblers in general have remained genetically compatible long after they evolved major phenotypic differences.

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