No evidence for an adaptive role of early molt into breeding plumage in a female fairy wren DOI Open Access
Sergio Nolazco, Michelle L. Hall, Sjouke A. Kingma

et al.

Behavioral Ecology, Journal Year: 2019, Volume and Issue: 31(2), P. 411 - 420

Published: Nov. 24, 2019

Abstract The evolution of ornaments as sexually selected signals is well understood in males, but female ornamentation remains understudied. Fairy wrens offer an excellent model system, given their complex social structure and mating systems, the diversity ornamentation. We investigated whether early molt into ornamental breeding plumage plays adaptive role females monogamous purple-crowned fairy wren Malurus coronatus, only known to have seasonal plumage. Using 6 years monitoring, we found that timing was similar there no evidence for assortative mating. Like males (previous study), older dominant individuals acquired earlier; however, contrast did not seem be costly since unfavorable environmental conditions or previous reproductive effort delay molt. Early associated with any indicator quality nor it attract additional offspring care by partners. also association between likelihood acquiring a (breeding) position presence proximity same-sex rivals. Our study results, which are findings conspecific suggest directional selection might relaxed this species, other genetically polygamous predicts extrapair success males. However, finding status dependent raises possibility attributes ornament may fulfill function females.

Language: Английский

Evaluating testosterone as a phenotypic integrator: From tissues to individuals to species DOI Creative Commons
Sara E. Lipshutz, Elizabeth George, Alexandra B. Bentz

et al.

Molecular and Cellular Endocrinology, Journal Year: 2019, Volume and Issue: 496, P. 110531 - 110531

Published: July 31, 2019

Language: Английский

Citations

58
An evolutionary shift to prioritizing mating over care is associated with consistently high androgen levels in male threespine stickleback DOI Creative Commons
Meghan F. Maciejewski, Alison M. Bell

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

ABSTRACT Steroid hormones play a role in regulating social behaviors vertebrates, but how they mediate the evolution of these traits remains an open question. Here, we use liquid chromatography-mass spectrometry (LC-MS/MS) to quantify panel steroids breeding males two recently diverged populations threespine stickleback. The common ecotype provides paternal care, while white has evolutionarily lost care. Hormone levels were quantified both ecotypes at three reproductive stages: (1) after completing nest, (2) soon mating, when commons start provide care and whites disperse embryos, (3) four days are performing parental no longer courting females not providing females. Androgens declined as began remained elevated across stages, possibly maintain production “spiggin,” androgen-dependent glue construct nests. Progestogen low lowest suggesting antagonistic relationship between progestogens sexual behavior. Both showed glucocorticoids stress axis may have ecotypes. Altogether, results evidence that regulate steroid differently support ways balance mating effort. Our data suggest variety mechanisms by which signaling regulation can change during early stages divergence behaviorally distinct populations.

Language: Английский

Citations

0
Female and male plumage colour signals aggression in a dichromatic tropical songbird DOI
Ana V. Leitão, Michelle L. Hall, Kaspar Delhey

et al.

Animal Behaviour, Journal Year: 2019, Volume and Issue: 150, P. 285 - 301

Published: March 4, 2019

Language: Английский

Citations

31
Male-like female morphs in hummingbirds: the evolution of a widespread sex-limited plumage polymorphism DOI Open Access
Eleanor S. Diamant, Jay J. Falk, Dustin R. Rubenstein

et al.

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2021, Volume and Issue: 288(1945)

Published: Feb. 24, 2021

Differences in the way males and females look or behave are common animals. However, discrete variation within sexes (sex-limited polymorphism) also occurs several vertebrate invertebrate lineages. In birds, female-limited polymorphism (FLP) which some resemble coloration is most prominent hummingbirds, a group known for its morphological behavioural sexual dimorphism. Yet, it remains unclear whether this intrasexual colour hummingbirds arises through direct selection on females, indirectly as non-adaptive byproduct resulting from males. Here, we analysed specimens more than 300 hummingbird species to determine extent, evolutionary history function of FLP. We found that FLP evolved independently every major clade nearly 25% species. Using phylogenetically informed analyses, rejected hypotheses result indirect pleiotropy across Instead, associated with ecology, migratory status, marginally social dominance, suggesting socioecological benefit females. Ultimately, show not only widespread likely adaptive, but may be useful understanding evolution female ornamentation systems under strong selection.

Language: Английский

Citations

24
The evolutionary history and mechanistic basis of female ornamentation in a tropical songbird DOI Creative Commons
Erik D. Enbody, Simon Yung Wa Sin, Jordan Boersma

et al.

Evolution, Journal Year: 2022, Volume and Issue: 76(8), P. 1720 - 1736

Published: June 24, 2022

Ornamentation, such as the showy plumage of birds, is widespread among female vertebrates, yet evolutionary pressures shaping ornamentation remain uncertain. In part this due to a poor understanding mechanistic route in females. To address issue, we evaluated history ornament expression tropical passerine bird, White-shouldered Fairywren, whose females, but not males, strongly vary between populations occurrence ornamented black-and-white plumage. We first use phylogenomic analysis demonstrate that derived and evolves independently changes male then exogenous testosterone field experiment induce partial naturally unornamented By sequencing transcriptome experimentally induced natural feathers, identify genes expressed during production evaluate degree which system associated with elevated testosterone, common males. reveal some females linked sexes differ ornament-linked gene expression. Lastly, using genomic outlier candidate melanogenesis lies region high divergence also differentially feather follicles different plumages. Taken together, these findings are consistent sex-specific selection favoring evolution ornaments key role for generating population through regulation. More broadly, our work highlights similarities differences how sexes.

Language: Английский

Citations

16
Evolution of female coloration: What have we learned from birds in general and blue tits in particular DOI
Claire Doutrelant, Amélie Fargevieille, Arnaud Grégoire

et al.

Advances in the study of behavior, Journal Year: 2020, Volume and Issue: unknown, P. 123 - 202

Published: Jan. 1, 2020

Language: Английский

Citations

25
Testosterone induces plumage ornamentation followed by enhanced territoriality in a female songbird DOI Open Access
Jordan Boersma, Erik D. Enbody, John Anthony Jones

et al.

Behavioral Ecology, Journal Year: 2020, Volume and Issue: 31(5), P. 1233 - 1241

Published: Aug. 4, 2020

Abstract We know little of the proximate mechanisms underlying expression signaling traits in female vertebrates. Across males, sexual and competitive traits, including ornamentation aggressive behavior, is often mediated by testosterone. In white-shouldered fairywren (Malurus alboscapulatus) New Guinea, females different subspecies differ presence or absence white shoulder patches melanic plumage, whereas males are uniformly ornamented. Previous work has shown that ornamented circulate more testosterone exhibit territorial aggression than do unornamented females. investigated degree to which regulates ornamental plumage behavior implanting free-living with Every testosterone-treated produced a male-like cloacal protuberance, 15 20 replaced experimentally plucked brown patch feathers but did not typically produce characteristic Testosterone treatment elevate prior production ornament during active life implant. However, induced ornamentation, exhausted implants, increased vocal components territory defense relative pretreatment period also testosterone-implanted ornamentation. Our results suggest induces partial acquisition phenotype expression, rather alone, elevations some behaviors.

Language: Английский

Citations

21
Sex role similarity and sexual selection predict male and female song elaboration and dimorphism in fairy‐wrens DOI
Karan J. Odom, Kristal E. Cain, Michelle L. Hall

et al.

Ecology and Evolution, Journal Year: 2021, Volume and Issue: 11(24), P. 17901 - 17919

Published: Dec. 1, 2021

Abstract Historically, bird song complexity was thought to evolve primarily through sexual selection on males; yet, in many species, both sexes sing and pressure may be broader. Previous research suggests competition for mates resources during short, synchronous breeding seasons leads more elaborate male songs at high, temperate latitudes. Furthermore, we expect male–female structure elaboration similar lower, tropical latitudes, where longer year‐round territoriality yield social pressures sexes. However, studies seldom take types of selective into account. We examined 15 populations nine‐fairy‐wren species (Maluridae), a Southern Hemisphere clade with female song. compared (in sexes) dimorphism latitude life‐history variables tied sex roles. Our results suggest that evolved part due males: were than low survival less provisioning. Also, independently songs: slower paced songs, although only synchronously populations. also found when parental care equal which provides strong evidence role similarity correlates similarity. Contrary Northern latitudinal patterns, higher, These can specific, favored contexts stronger selection. At the same time, associated appear favor structure.

Language: Английский

Citations

16
No effect of testosterone or sexual ornamentation on telomere dynamics: A case study and meta‐analyses DOI Creative Commons
Gregory T. Taylor, Alexandra McQueen, Justin R. Eastwood

et al.

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(3)

Published: March 1, 2024

Abstract Life‐history theory predicts that reproductive investments are traded‐off against self‐maintenance. Telomeres, the protective caps on ends of chromosomes, offer a promising avenue for assessing life‐history trade‐offs, as they shorten in response to stressors and predictive remaining lifespan. In males, testosterone frequently mediates part, through its effects sexual ornamentation, which is an important aspect investment. However, studies within‐individual associations between telomere dynamics ornamentation limited number have produced mixed results. Furthermore, most such been observational, making it difficult discern nature any causal relationship. To address this, we used short‐acting implants free‐living male superb fairy‐wrens ( Malurus cyaneus ) stimulate production ornament: early moult into costly blue breeding plumage. We found no evidence elevated testosterone, consequent earlier plumage, accelerated shortening. therefore followed up with systematic review two meta‐analyses (28 studies, 54 effect sizes) exploring telomeres (1) (2) ornamentation. line our experimental findings, neither meta‐analysis showed overall correlation or length dynamics. meta‐regression experimental, compared reported greater trade‐offs. Our highlight need further better understand potential responses

Language: Английский

Citations

2
Male White-shouldered Fairywrens (Malurus alboscapulatus) elevate androgens greater when courting females than during territorial challenges DOI Creative Commons
Jordan Boersma, John Anthony Jones, Erik D. Enbody

et al.

Hormones and Behavior, Journal Year: 2022, Volume and Issue: 142, P. 105158 - 105158

Published: April 1, 2022

Androgens like testosterone mediate suites of physical and behavioral traits across vertebrates, circulation varies considerably within taxa. However, an understanding the causal factors variation in circulating has proven difficult despite decades research. According to challenge hypothesis, agonistic interactions between males immediately prior breeding season produce highest levels measured during this period. While many studies have provided support for most species do not respond male-male competition by elevating testosterone. As a result, recent revision hypothesis ('challenge 2.0') places male-female as primary cause rapid elevations male vertebrates. Here, we offer test both iterations tropical bird species. We first illustrate that White-shouldered Fairywrens (Malurus alboscapulatus) differ subspecies plasma androgen concentrations. Then use social network approach find with higher androgens are characterized greater interaction scores, including more time aggregating perform sexual displays. Next, controlled experiment whether simulated territorial intrusion and/or courtship contexts androgens. found elevated intrusions relative flushed controls, however, sampled competitions had controls while defending territories. Ultimately, our results consistent 2.0, extra-pair females were associated elevation than disputes.

Language: Английский

Citations

10