Global ETD Search
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Showing 1 to 11 of 11 for “"Coverts"”.
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Moult as a dynamic link in the annual cycle of birds: insights from seabirds and a long-distance migratory raptor
… variations of flight feathers and primary coverts in 100 non-moulting Amur Falcons. There are seven chapters including an introductory first chapter. In Chapter 1, I introduce the importance of feathers and why maintaining their quality is key to birds' survival. Feathers are dead …
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Understanding moult patterns in Albatrosses and Petrels breeding on Marion and Gough Islands
… Albatrosses and secondary and greater secondary coverts in giant petrels in relation to breeding activity. I used digital photography to record the wear patterns in the wings of Wandering Albatrosses and giant petrels. Using photographs of upperwings of marked individuals over time allowed the …
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A Ratiometric Probe for Rapid Evaluation of Transfer Hydrogenation Efficiency
… studies using a plate reader. The RIC575 probe coverts to RIC525 upon reduction, exhibiting a 50 nm hypsochromic shift in its emission maximum. This hypsochromic shift was later proved to be significant enough for ratiometric quantification. 10 different Cp*Ir catalysts were study with RIC575 …
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Aspectos da ontogenia do Jacu-guaçu (Penelope obscura bronzina Hellmayr, 1914), segundo levantamento em cativeiro
… feathers on the mantle and on the lesser wing-coverts, while in the adult these parts were black with a green gloss and the lateral edges of the feathers were white. There was considerable variation in the pattern colouration of the birth plumage of the chickens and no characteristic was found …
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Desenvolvimento pós-embrionário de Nothocrax urumutum (Spix, 1825) em cativeiro (Aves, Cracidae)
… already developed remíges and and upper wing coverts parallels only the Megapodidae. Because of such characteristic, the Megapodidae and Cracidae have often been considered related and very primitive groups, since the conspicuous precouciousness of their youngs corresponds to a plesiomorphy in …
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Materials and design strategies for solar microcells
… cell’s surface, a down-shifting material that coverts ultraviolet light into visible light, as well as optical elements that can spectrum split light between two subcells of different band gaps. The solar cells studied in this work are Si, InGaP, and GaAs solar microcells. Their fabrication and …
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Breeding behaviour and polygyny in the Red Bishop bird Euplectes orix (L.)
… throat, breast, rump, upper and under tail coverts are scarlet. The mantle feathers are tawny, but the wings and tail remain brown. The bill colour also changes from flesh-coloured to black. Hall and Moreau (1970), whose nomenclature is used for all the passerine species mentioned, regard …
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Responses of the Ocellated Turkey (Meleagris ocellata) to Human Disturbance
… in the blue ocelli of the secondary tail coverts among disturbance levels. The dominant ultraviolet spectrum hue of the ocelli were negatively correlated with coccidian parasite load but the dominant red spectrum hue was positively correlated with this parasite. Chapter Three presents …
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A mechanistic approach to understanding the colour polymorphism in black sparrowhawks (Accipiter melanoleucus)
… feathers on the breast, belly and underwing coverts. The morph has been associated with ambient light-dependent foraging success and activity behaviour: Dark morphs forage more and have higher foraging success under low light conditions whereas light morphs forage independently of light …
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Bio-Inspired Flow Control Using Fluid-Structure Interaction Modeling and Machine Learning
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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Validation and use of novel techniques to study the impacts of large-scale environmental changes on the health of wild waterfowl
… feather sections of the tail, wing (secondary coverts), and back feathers. Our results confirm that a) CORT deposited in feathers is primarily derived from serum CORT; b) a considerable amount of feather development (and hence CORT deposition) occurs within the follicle before the feather …