Ecological constraint and the evolution of sexual dichromatism in darters

Evolution ◽  
2015 ◽  
Vol 69 (5) ◽  
pp. 1219-1231 ◽  
Author(s):  
Christen M. Bossu ◽  
Thomas J. Near
Keyword(s):  
Sexual Dichromatism ◽  
Ecological Constraint

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

Bluegill Coloration as a Sexual Ornament: Evidence From Ontogeny, Sexual Dichromatism, and Condition Dependence

Ethology ◽  
2010 ◽  
Vol 116 (5) ◽  
pp. 416-428 ◽  
Author(s):  
Karen M. Cogliati ◽  
Lynda D. Corkum ◽  
Stéphanie M. Doucet
Keyword(s):  
Condition Dependence ◽  
Sexual Dichromatism ◽  
Sexual Ornament

scholarly journals Acoustic and visual adaptations to predation risk: A predator affects communication in vocal female fish

2021 ◽  
Author(s):  
Isabelle Pia Maiditsch ◽  
Friedrich Ladich
Keyword(s):  
Sound Pressure ◽  
Dominant Frequency ◽  
Pressure Level ◽  
Female Fish ◽  
Predation Threat ◽  
Calling Behaviour ◽  
Sound Levels ◽  
Astronotus Ocellatus ◽  
Visual Signalling ◽  
Ecological Constraint

Abstract Predation is an important ecological constraint that influences communication in animals. Fish respond to predators by adjusting their visual signalling behaviour, but the responses in calling behaviour in the presence of a visually detected predator are largely unknown. We hypothesize that fish will reduce visual and acoustic signalling including sound levels and avoid escalating fights in the presence of a predator. To test this we investigated dyadic contests in female croaking gouramis (Trichopsis vittata, Osphronemidae) in the presence and absence of a predator (Astronotus ocellatus, Cichlidae) in an adjoining tank. Agonistic behaviour in T. vittata consists of lateral (visual) displays, antiparallel circling and production of croaking sounds and may escalate to frontal displays. We analysed the number and duration of lateral display bouts, the number, duration, sound pressure level and dominant frequency of croaking sounds as well as contest outcomes. The number and duration of lateral displays decreased significantly in predator as compared to no-predator trials. Total number of sounds per contest dropped in parallel but no significant changes were observed in sound characteristics. In the presence of a predator dyadic contests were decided or terminated during lateral displays and never escalated to frontal displays. The gouramis showed approaching behaviour towards the predator between lateral displays. This is the first study supporting the hypothesis that predators reduce visual and acoustic signalling in a vocal fish. Sound properties, in contrast, did not change. Decreased signalling and the lack of escalating contests reduce the fish’s conspicuousness and thus predation threat.

Sexual Dichromatism in Birds: Importance of Nest Predation and Nest Location for Females Versus Males

Evolution ◽  
1996 ◽  
Vol 50 (6) ◽  
pp. 2454 ◽  
Author(s):  
Thomas E. Martin ◽  
Alexander V. Badyaev
Keyword(s):  
Nest Predation ◽  
Sexual Dichromatism ◽  
Nest Location

scholarly journals Multiple origins of sexual dichromatism and aposematism within large carpenter bees

Evolution ◽  
2018 ◽  
Vol 72 (9) ◽  
pp. 1874-1889 ◽  
Author(s):  
Bonnie B. Blaimer ◽  
Jonathan R. Mawdsley ◽  
Seán G. Brady
Keyword(s):  
Sexual Dichromatism ◽  
Multiple Origins ◽  
Carpenter Bees

Sexual Dichromatism

2017 ◽  
pp. 1-2
Author(s):  
Thad Q. Bartlett ◽  
Lydia E. O. Light
Keyword(s):  
Sexual Dichromatism

scholarly journals Plumage iridescence is associated with distinct feather microbiota in a tropical passerine

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Veronika Gvoždíková Javůrková ◽  
Erik D. Enbody ◽  
Jakub Kreisinger ◽  
Kryštof Chmel ◽  
Jakub Mrázek ◽  
...  
Keyword(s):  
Sexual Selection ◽  
Community Structure ◽  
Microbial Communities ◽  
Plumage Coloration ◽  
Microbial Load ◽  
Sexual Dichromatism ◽  
Physiological Processes ◽  
Fitness Consequences ◽  
Future Work

Abstract Birds present a stunning diversity of plumage colors that have long fascinated evolutionary ecologists. Although plumage coloration is often linked to sexual selection, it may impact a number of physiological processes, including microbial resistance. At present, the degree to which differences between pigment-based vs. structural plumage coloration may affect the feather microbiota remains unanswered. Using quantitative PCR and DGGE profiling, we investigated feather microbial load, diversity and community structure among two allopatric subspecies of White-shouldered Fairywren, Malurus alboscapulatus that vary in expression of melanin-based vs. structural plumage coloration. We found that microbial load tended to be lower and feather microbial diversity was significantly higher in the plumage of black iridescent males, compared to black matte females and brown individuals. Moreover, black iridescent males had distinct feather microbial communities compared to black matte females and brown individuals. We suggest that distinctive nanostructure properties of iridescent male feathers or different investment in preening influence feather microbiota community composition and load. This study is the first to point to structural plumage coloration as a factor that may significantly regulate feather microbiota. Future work might explore fitness consequences and the role of microorganisms in the evolution of avian sexual dichromatism, with particular reference to iridescence.

scholarly journals Sexual dichromatism of the Blue-throated Starfrontlet, Coeligena helianthea, hummingbird plumage

2019 ◽  
Vol 161 (1) ◽  
pp. 289-296 ◽  
Author(s):  
Juliana Sosa ◽  
Juan L. Parra ◽  
Doekele G. Stavenga ◽  
Marco A. Giraldo
Keyword(s):  
Electron Microscopy ◽  
Optical Properties ◽  
Spectral Data ◽  
Reflectance Spectra ◽  
Structural Basis ◽  
Sexual Dichromatism ◽  
Male And Female ◽  
Optical Modelling ◽  
The Many

Abstract Among the many richly coloured birds, hummingbirds with their brilliant colouration are outstanding. We studied the plumage of male and female Blue-throated Starfrontlet, Coeligena helianthea, which exhibits a marked sexual dichromatism. The wide diversity of coloured feathers (blue, purple, golden, green, red) makes it an attractive species to investigate the structural basis of the colouration and to study the connection between the displayed colours and the perception by conspecifics. We analysed the optical properties of the feather barbules, applying spectrophotometry, scatterometry, and electron microscopy. Using the anatomical results, the spectral data can be interpreted by optical modelling. The reflectance spectra of the feathers of male C. helianthea strikingly overlap with the spectral sensitivities of bird photoreceptors, which suggests that the feather and photoreceptor spectra are tuned.

scholarly journals CORRELATED EVOLUTION OF MIGRATION AND SEXUAL DICHROMATISM IN THE NEW WORLD ORIOLES (ICTERUS)

Evolution ◽  
2009 ◽  
Vol 63 (12) ◽  
pp. 3269-3274 ◽  
Author(s):  
Nicholas R. Friedman ◽  
Christopher M. Hofmann ◽  
Beatrice Kondo ◽  
Kevin E. Omland
Keyword(s):  
New World ◽  
Sexual Dichromatism ◽  
Correlated Evolution ◽  
Evolution Of Migration
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