A new species of Telenomus which is sexually dichromatic is described and imaged from India.
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| http://dx.doi.org/10.11646/zootaxa.4375.2.6 | DOI Listing |
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Mountain Dragons of the genus Diploderma has experienced rapid taxonomic change in the recent years. The fast rate of taxonomic changes often leads to insufficient data for newly described species on their morphological variation, especially regarding sexual dimorphism, as well as the missing information on their natural history and conservation status. Limited time for taxonomic works may also result in misidentification of "new species".
View Article and Find Full Text PDFAbstractSexual dimorphism typically arises as a result of sexual selection or sex-specific natural selection. Species that exhibit cryptic coloration provide an excellent system for studying sex-specific selection for sexual dichromatism. In this study, we examined the sexually dichromatic use of chromatophores in the seawhip shrimp, (Borradaile, 1920), which commonly resides on colonies of (Lamarck, 1815), a gorgonian octocoral that occurs in multiple color morphs.
View Article and Find Full Text PDFVariation in Plumage Coloration of Rosy-Faced Lovebirds (Agapornis roseicollis): Links to Sex, Age, Nutritional Condition, Viral Infection, and Habitat Urbanization.
J Exp Zool A Ecol Integr Physiol
January 2025
School of Life Sciences, Arizona State University, Tempe, Arizona, USA.
Expression of vibrant plumage color plays important communication roles in many avian clades, ranging from penguins to passerines, but comparatively less is known about color signals in parrots (order Psittaciformes). We measured variation in coloration from three plumage patches (red face, blue rump, red tail) in an introduced population of rosy-faced lovebirds (Agapornis roseicollis) in Phoenix, Arizona, USA and examined color differences between the sexes and ages as well as relationships with several indices of quality, including disease presence/absence (infection with beak and feather disease, Circovirus parrot, and a polyomavirus, Gammapolyomavirus avis), nutritional state (e.g.
View Article and Find Full Text PDFFeather carotenoids of the American Redstart (Setophaga ruticilla) across age and sex classes and the reliability of standard color metrics to capture pigment variation.
Comp Biochem Physiol B Biochem Mol Biol
January 2025
Department of Biological Sciences, Thompson Rivers University, 805 TRU Way, Kamloops, BC V2C 0C8, Canada. Electronic address:
Plumage ornaments act as important sexual signals, though the extent to which these ornaments act as honest signals-and the physiological mechanisms that maintain honesty-remain poorly understood. We studied the pigmentary basis of tail color in the American Redstart (Setophaga ruticilla), a species of songbird with sexual dichromatism and delayed plumage maturation; younger males resemble females, only replacing their yellow feathers for bright orange ones after the first breeding season. The yellow rectrices of females and young males and the orange feathers of older males largely contain the same pigments, but in vastly different proportions.
View Article and Find Full Text PDFFast and Simple Molecular Test for Sex Determination of the Monomorphic Individuals.
Animals (Basel)
June 2024
Department of Molecular Biology, Faculty of Natural Sciences, Comenius University, Ilkovicova 6, 842 15 Bratislava, Slovakia.
Sex determination based just on morphological traits such as plumage dichromatism, sexual size dimorphism, behavior, or vocalizations is really challenging because of the sexual monomorphism present in more than half of avian species. Currently, a lot of them can be tested through DNA-based procedures, but they do not fit all the avian species, such as . The aim of this study was to design a new molecular method suitable for routine sex determination for that species that is fast, simple, and cost- and time- effective.
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