Results 41 to 50 of about 2,923 (243)

Inheritance of plumage color in poultry [PDF]

Experimental Biology and Medicine, 1910
The experiments of Dr. C. C. Guthrie who transplanted hens'ovaries to foster mothers of different plumage color from their own and was led to the conclusion that the engrafted ovaries became functional and their eggs gained certain characteristics from the foster mothers'are not at all convincing to the student of normal heredity of plumage color in ...
openaire   +1 more source

Color plumage polymorphism and predator mimicry in brood parasites [PDF]

Frontiers in Zoology, 2013
Plumage polymorphism may evolve during coevolution between brood parasites and their hosts if rare morph(s), by contravening host search image, evade host recognition systems better than common variant(s). Females of the parasitic common cuckoo (Cuculus canorus) are a classic example of discrete color polymorphism: gray females supposedly mimic the ...
Trnka, Alfréd, Grim, Tomáš
openaire   +2 more sources

Subtle sexual plumage color dimorphism and size dimorphism in a South American colonial breeder, the Monk Parakeet (Myiopsitta monachus)

Avian Research, 2020
Background Parrots (Psittacidae Family) are one of the most colorful groups of birds in the world, their colors produced both structurally and via unusual pigments (psittacofulvins). Most species are considered to be monogamous, and many have been viewed
Macarena Morales, Deysi J. Gigena, Santiago M. Benitez-Vieyra, Diego J. Valdez   +3 more
doaj   +1 more source

THE COLOR PATTERN OF ALABIO DUCK (Anas platyrhynchos Borneo) IN SOUTH KALIMANTAN

Journal of the Indonesian Tropical Animal Agriculture, 2014
The study was carried to identify the phenotypic variation of Alabio duck (Anas platyrhynchosBorneo) being kept by smallholder. This research was conducted in Hulu Sungai Selatan (HSS), HuluSungai Tengah (HST) and Hulu Sungai Utara (HSU), South ...
S. Suryana, R.R. Noor, P.S. Hardjosworo, L.H. Prasetyo   +3 more
doaj   +1 more source

Selection and inheritance of sexually dimorphic juvenile plumage coloration [PDF]

Ecology and Evolution, 2015
AbstractSexually dimorphic plumage coloration is widespread in birds and is generally thought to be a result of sexual selection for more ornamented males. Although many studies find an association between coloration and fitness related traits, few of these simultaneously examine selection and inheritance.
Tringali, Angela, Bowman, Reed, Husby, Arild   +2 more
openaire   +3 more sources

Pancake Lenses through Curved Lamination for Compact Virtual Reality

Advanced Intelligent Systems, EarlyView.
This article presents an ultrathin VR optical system based on a 1.35 in. microdisplay, leveraging curved lamination technology. Compared to mainstream solutions, the proposed design demonstrates superior compactness (volume compression by 12%) and enhanced optical performance.
Jiaping Sun, Dewen Cheng, Cheng Chi, Yuefan Shan, Da Wang, Chao Ping Chen   +5 more
wiley   +1 more source

Convergent evolution of parrot plumage coloration

PNAS Nexus
Abstract Parrots have remarkable plumage coloration that result in part from a unique ability to produce pigments called psittacofulvins that yield yellow to red feather colors. Little is known about the evolution of psittacofulvin-based pigmentation.
Fushi Ke, Henriëtte van der Zwan, Emily Shui Kei Poon, Alison Cloutier, Dirk Van den Abeele, Rencia van der Sluis, Simon Yung Wa Sin   +6 more
openaire   +2 more sources

How colorful are birds? Evolution of the avian plumage color gamut [PDF]

Behavioral Ecology, 2011
The avian plumage color gamut is the complete range of plumage colors, as seen by birds themselves. We used a tetrahedral avian color stimulus space to estimate the avian plumage color gamut from a taxonomically diverse sample of 965 plumage patches from 111 avian species. Our sample represented all known types of plumage coloration mechanisms.
Mary Caswell Stoddard, Richard O. Prum
openaire   +2 more sources

Cardiac morphological and morphometric analysis of Ardea alba

The Anatomical Record, EarlyView.
Abstract Ardea alba (Linnaeus, 1758) is a widely distributed heron species whose cardiovascular morphology remains poorly described. This study aimed to characterize the cardiac morphology and morphometry of adult A. alba. Ten specimens were analyzed using radiographic, morphometric, histological, scanning electron microscopy, and three‐dimensional ...
Julia Vaz Feio, Max Alex Santos Ferreira, Elane Guerreiro Giese, Érika Branco, Antônio Basílio Guerreiro Junior, Ana Rita de Lima   +5 more
wiley   +1 more source

Melanin-Based Color of Plumage: Role of Condition and of Feathers' Microstructure [PDF]

Integrative and Comparative Biology, 2014
Whether melanin-based colors honestly signal a bird's condition during the growth of feathers is controversial, and it is unclear if, or how, the physiological processes underlying melanogenesis or the role of the microstructure of feathers in imparting structural color to feathers may be adversely affected by condition.
D'Alba, L., van Hemert, C., Spencer, K., Heidinger, B., Gill, L., Evans, N., Monaghan, P., Handel, C., Shawkey, M.   +8 more
openaire   +3 more sources