Do carotenoid‐based ornaments entail resource trade‐offs? An evaluation of theory and data

RE Koch, GE Hill - Functional Ecology, 2018‏ - Wiley Online Library
Within the past several decades, resource trade‐offs have emerged as the commonly
accepted explanation for how carotenoid‐based coloration links to individual performance …

Carotenoid metabolism strengthens the link between feather coloration and individual quality

RJ Weaver, ESA Santos, AM Tucker, AE Wilson… - Nature …, 2018‏ - nature.com
Thirty years of research has made carotenoid coloration a textbook example of an honest
signal of individual quality, but tests of this idea are surprisingly inconsistent. Here, to …

The rate of telomere loss is related to maximum lifespan in birds

GM Tricola, MJP Simons, E Atema… - … of the Royal …, 2018‏ - royalsocietypublishing.org
Telomeres are highly conserved regions of DNA that protect the ends of linear
chromosomes. The loss of telomeres can signal an irreversible change to a cell's state …

Colourful traits in female birds relate to individual condition, reproductive performance and male-mate preferences: a meta-analytic approach

A Hernández, M Martínez-Gómez… - Biology …, 2021‏ - royalsocietypublishing.org
Colourful traits in females are suggested to have evolved and be maintained by sexual
selection. Although several studies have evaluated this idea, support is still equivocal …

No evidence that carotenoid pigments boost either immune or antioxidant defenses in a songbird

RE Koch, AN Kavazis, D Hasselquist, WR Hood… - Nature …, 2018‏ - nature.com
Dietary carotenoids have been proposed to boost immune system and antioxidant functions
in vertebrate animals, but studies aimed at testing these physiological functions of …

Environmental gradients predict the ratio of environmentally acquired carotenoids to self‐synthesised pteridine pigments

D Stuart‐Fox, KJ Rankin, A Lutz, A Elliott… - Ecology …, 2021‏ - Wiley Online Library
Carotenoids are important pigments producing integument colouration; however, their
dietary availability may be limited in some environments. Many species produce yellow to …

[HTML][HTML] Life after logging in tropical forests of Borneo: A meta-analysis

D Costantini, DP Edwards, MJP Simons - Biological Conservation, 2016‏ - Elsevier
Selectively logged tropical forests retain high species richness and functional diversity, but
species composition changes after logging, suggesting that some species are more …

The evolution of carotenoid‐based plumage colours in passerine birds

K Delhey, M Valcu, J Dale… - Journal of Animal …, 2023‏ - Wiley Online Library
Many birds use carotenoids to colour their plumage yellow to red. Because birds cannot
synthesise carotenoids, they need to obtain these pigments from food, although some …

Mitochondria-targeted molecules determine the redness of the zebra finch bill

A Cantarero, C Alonso-Alvarez - Biology letters, 2017‏ - royalsocietypublishing.org
The evolution and production mechanisms of red carotenoid-based ornaments in animals
are poorly understood. Recently, it has been suggested that enzymes transforming yellow …

Relocation to avoid costs: A hypothesis on red carotenoid‐based signals based on recent CYP2J19 gene expression data

C Alonso‐Alvarez, P Andrade, A Cantarero… - …, 2022‏ - Wiley Online Library
In many vertebrates, the enzymatic oxidation of dietary yellow carotenoids generates red
keto‐carotenoids giving color to ornaments. The oxidase CYP2J19 is here a key effector. Its …