Himalayan black bulbuls (Hypsipetes leucocephalus niggerimus) exhibit sexual dichromatism under ultraviolet light that is invisible to the human eye

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dc.contributor.authorHung, Hsin-Yi
dc.contributor.authorYeung, Carol K. L.
dc.contributor.authorOmland, Kevin E.
dc.contributor.authorYao, Cheng-Te
dc.contributor.authorYao, Chiou-Ju
dc.contributor.authorLi, Shou-Hsien
dc.date.accessioned2018-11-09T17:43:59Z
dc.date.available2018-11-09T17:43:59Z
dc.date.issued2017-04-06
dc.description.abstractSexual dichromatism is a key proxy for the intensity of sexual selection. Studies of dichromatism in birds may, however, have underestimated the intensity and complexity of sexual selection because they used museum specimens alone without taking colour-fading into account or only measured conspicuous visual traits in live animals. We investigated whether the Himalayan black bulbul (Hypsipetes leucocephalus nigerrimus), which is sexually monomorphic to the human eye, exhibits sexual dichromatism distinguishable by a spectrometer. We measured the reflectance (within both the human visual perceptive and the ultraviolet ranges) of two carotenoid-based parts and eight dull and melanin-based parts for each individual live bird or museum skin sampled. According to an avian model of colour discrimination thresholds, we found that males exhibited perceptibly redder beaks, brighter tarsi and darker plumage than did females. This suggests the existence of multiple cryptic sexually dichromatic traits within this species. Moreover, we also observed detectable colour fading in the museum skin specimens compared with the live birds, indicating that sexual dichromatism could be underestimated if analysed using skin specimens alone.en_US
dc.description.urihttps://www.nature.com/articles/srep43707en_US
dc.format.extent9 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/M25H7BZ16
dc.identifier.citationHsin-Yi Hung , Carol K. L. Yeung , Kevin E. Omland , Cheng-Te Yao , Chiou-Ju Yao & Shou-Hsien Li, Himalayan black bulbuls (Hypsipetes leucocephalus niggerimus) exhibit sexual dichromatism under ultraviolet light that is invisible to the human eye, Scientific Reports volume 7, Article number: 43707 (2017)https://doi.org/10.1038/srep43707en_US
dc.identifier.urihttps://doi.org/10.1038/srep43707
dc.identifier.urihttp://hdl.handle.net/11603/11941
dc.language.isoen_USen_US
dc.publisherSpringer Nature Limiteden_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Biological Sciences Department Collection
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsAttribution 4.0 International (CC BY 4.0)*
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/*
dc.subjectHimalayan black bulbulsen_US
dc.subjectsexual dichromatismen_US
dc.subjectultraviolet lighten_US
dc.subjectinvisibleen_US
dc.subjecthuman eyeen_US
dc.titleHimalayan black bulbuls (Hypsipetes leucocephalus niggerimus) exhibit sexual dichromatism under ultraviolet light that is invisible to the human eyeen_US
dc.typeTexten_US

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