Results 91 to 100 of about 51,270 (352)

Methods for correcting plumage color fading in the Barn Swallow [PDF]

open access: green, 2008
It is necessary to correct plumage color fading when comparing the plumage coloration of birds captured at different times during the breeding season. We proposed two methods for correcting plumage color fading and compared them using the throat feathers
Hasegawa Masaru   +3 more
openalex   +3 more sources

Plumage color degradation indicates reproductive effort: an experiment [PDF]

open access: gold, 2023
Gergely Hegyi   +4 more
openalex   +1 more source

Optimális éves viselkedési modellek: út a fiziológiától a populációkig? = Optimal annual routines: a path from physiology to populations? [PDF]

open access: yes, 2009
A pályázat fő célja annak kiderítése volt, hogy a különböző állapotváltozók hogyan befolyásolják az optimális viselkedést, speciálisan a hogyan befolyásolják a fő életmenet események időzítését az éves cikluson belül. E cél elérése érdekében több modellt
Alasdair, I. Houston   +3 more
core  

Marine silicon for biomedical sustainability

open access: yesBMEMat, EarlyView.
Schematic illustrating marine silicon for biomedical engineering. Abstract Despite momentous divergence from oceanic origin, human beings and marine organisms exhibit elemental homology through silicon utilization. Notably, silicon serves as a critical constituent in multiple biomedical processes.
Yahui Han   +3 more
wiley   +1 more source

Offspring plumage colouration as a condition-dependent signal in the blue tit [PDF]

open access: gold, 2022
Jorge García‐Campa   +2 more
openalex   +1 more source

Condition-dependence of pheomelanin-based coloration in nuthatches Sitta europaea suggests a detoxifying function: implications for the evolution of juvenile plumage patterns [PDF]

open access: yes, 2017
Adult-like juvenile plumage patterns often signal genotypic quality to parents. During adulthood, the same patterns often signal quality to mates.
Galván, Ismael
core   +1 more source

The flexible, the stereotyped and the in‐between: putting together the combinatory tool use origins hypothesis

open access: yesBiological Reviews, EarlyView.
ABSTRACT Tool use research has long made the distinction between tool using that is considered learned and flexible, and that which appears to be instinctive and stereotyped. However, animals with an inherited tool use specialisation can exhibit flexibility, while tool use that is spontaneously innovated can be limited in its expression and facilitated
Jennifer A. D. Colbourne   +1 more
wiley   +1 more source

Floor versus cage rearing: effects on production, egg quality and physical condition of laying hens housed in furnished cages Cria em piso versus cria em bateria: efeitos na produção, qualidade de ovos e condição física de poedeiras alojadas em gaiolas enriquecidas

open access: yesCiência Rural, 2009
The influences of floor- and cage-rearing on egg production, egg quality and physical condition were investigated in laying hens housed in furnished cages.
Victor Fernando Büttow Roll   +2 more
doaj  

Leucistic plumage as a result of progressive greying in a cryptic nocturnal bird [PDF]

open access: gold, 2022
Carlos Camacho   +5 more
openalex   +1 more source

Diet of bird‐like troodontid dinosaurs: synthesis of a contentious clade

open access: yesBiological Reviews, EarlyView.
ABSTRACT Troodontidae is a clade of small‐to medium‐sized maniraptoran theropods that mainly lived in Laurasia (modern Asia, North America and Europe) during the Jurassic and Cretaceous periods and are believed to have had a variety of diets. The uniqueness of troodontid teeth suggests that they diverged from the typical flesh‐based diet of non‐avian ...
Yui Chi Fan   +2 more
wiley   +1 more source

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