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

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

(2018) Rebecca E. Koch et al.   Nature Communications

Carotenoid metabolism strengthens the link between feather coloration and individual quality

(2018) Ryan J. Weaver et al.   Nature Communications

What maintains signal honesty in animal colour displays used in mate choice?

(2017) Ryan J. Weaver et al.   PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

High-density lipoprotein receptor SCARB1 is required for carotenoid coloration in birds

(2017) Matthew B. Toomey et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

The Evolution and Genetics of Carotenoid Processing in Animals

(2017) David P.L. Toews et al.   TRENDS IN GENETICS

Imperfect past and present progressive: beak color reflects early-life and adult exposure to antigen

(2016) Loren Merrill et al.   BEHAVIORAL ECOLOGY

Mitochondrial function, ornamentation, and immunocompetence

(2016) Rebecca E. Koch et al.   BIOLOGICAL REVIEWS

Genetic Basis for Red Coloration in Birds

(2016) Ricardo J. Lopes et al.   CURRENT BIOLOGY

Red Carotenoid Coloration in the Zebra Finch Is Controlled by a Cytochrome P450 Gene Cluster

(2016) Nicholas I. Mundy et al.   CURRENT BIOLOGY

An assessment of techniques to manipulate oxidative stress in animals

(2016) Rebecca E. Koch et al.   FUNCTIONAL ECOLOGY

The Importance of Carotenoid Dose in Supplementation Studies with Songbirds

(2016) Rebecca E. Koch et al.   PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY

Specific carotenoid pigments in the diet and a bit of oxidative stress in the recipe for producing red carotenoid-based signals

(2016) Esther García-de Blas et al.   PeerJ

Opposing effects of oxidative challenge and carotenoids on antioxidant status and condition-dependent sexual signalling

(2016) Oldřich Tomášek et al.   Scientific Reports

Effects of carotenoid supplementation and oxidative challenges on physiological parameters and carotenoid-based coloration in an urbanization context

(2015) Mathieu Giraudeau et al.   BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY

Plasma carotenoid concentrations of incubating American kestrels (Falco sparverius) show annual, seasonal, and individual variation and explain reproductive outcome

(2015) Elizabeth C. Sassani et al.   BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY

Carotenoid-Dependent Signals and the Evolution of Plasma Carotenoid Levels in Birds

(2014) Mirre J. P. Simons et al.   AMERICAN NATURALIST

Foraging for carotenoids: do colorful male hihi target carotenoid-rich foods in the wild?

(2014) Leila K. Walker et al.   BEHAVIORAL ECOLOGY

Cellular Respiration: The Nexus of Stress, Condition, and Ornamentation

(2014) G. E. Hill   INTEGRATIVE AND COMPARATIVE BIOLOGY

The evolution of index signals to avoid the cost of dishonesty

(2014) J. M. Biernaskie et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

House Finch Populations Differ in Early Inflammatory Signaling and Pathogen Tolerance at the Peak of Mycoplasma gallisepticum Infection

(2013) James S. Adelman et al.   AMERICAN NATURALIST

The Vitamin A–Redox Hypothesis: A Biochemical Basis for Honest Signaling via Carotenoid Pigmentation

(2012) Geoffrey E. Hill et al.   AMERICAN NATURALIST

Food color preferences against a dark, textured background vary in relation to sex and age in house finches (Carpodacus mexicanus)

(2012) Hirbod Behbahaninia et al.   BEHAVIOUR

Is carotenoid ornamentation linked to the inner mitochondria membrane potential? A hypothesis for the maintenance of signal honesty

(2012) James D. Johnson et al.   BIOCHIMIE

Backyard poultry 2. Veterinary care and disease control

(2012) Stephen Lister et al.   IN PRACTICE

Ornamental bill color rapidly signals changing condition

(2012) Malcolm F. Rosenthal et al.   JOURNAL OF AVIAN BIOLOGY

Carotenoid-Based Coloration, Condition, and Immune Responsiveness in the Nestlings of a Sexually Dimorphic Bird of Prey

(2012) Audrey Sternalski et al.   PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY

What Does Carotenoid-Dependent Coloration Tell? Plasma Carotenoid Level Signals Immunocompetence and Oxidative Stress State in Birds–A Meta-Analysis

(2012) Mirre J. P. Simons et al.   PLoS One

The antioxidant properties of canthaxanthin and its potential effects in the poultry eggs and on embryonic development of the chick. Part 2.

(2012) P.F. SURAI   WORLDS POULTRY SCIENCE JOURNAL

Unraveling the true complexity of costly color signaling

(2011) Darrell J. Kemp et al.   BEHAVIORAL ECOLOGY

Carotenoid-based signals in behavioural ecology: a review

(2011) Svensson et al.   BEHAVIOUR

Carotenoids bolster immunity during moult in a wild songbird with sexually selected plumage coloration

(2011) KEVIN J. MCGRAW et al.   BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY

Condition-dependent traits as signals of the functionality of vital cellular processes

(2011) Geoffrey E. Hill   ECOLOGY LETTERS

Beyond phytohaemagglutinin: assessing vertebrate immune function across ecological contexts

(2011) Gregory E. Demas et al.   JOURNAL OF ANIMAL ECOLOGY

Carotenoid intake does not affect immune-stimulated oxidative burst in greenfinches

(2011) E. Sild et al.   JOURNAL OF EXPERIMENTAL BIOLOGY

Lutein supplementation alters inflammatory cytokine production and antioxidant status in F-line turkeys

(2011) R. Shanmugasundaram et al.   POULTRY SCIENCE

Ecological, biomedical and epidemiological approaches to understanding oxidative balance and ageing: what they can teach each other

(2010) Alan A. Cohen et al.   FUNCTIONAL ECOLOGY

Fitness consequences of immune responses: strengthening the empirical framework for ecoimmunology

(2010) Andrea L. Graham et al.   FUNCTIONAL ECOLOGY

How to measure oxidative stress in an ecological context: methodological and statistical issues

(2010) Peeter Hõrak et al.   FUNCTIONAL ECOLOGY

Garden Warbler, Sylvia borin, detect carotenoids in food but differ strongly in individual food choice

(2010) Carlo Catoni et al.   JOURNAL OF ORNITHOLOGY

ORIGINAL ARTICLE: Lutein exposure, in ovo or in the diet, reduces parameters of inflammation in the liver and spleen laying-type chicks (Gallus gallus domesticus)

(2010) L. S. Meriwether et al.   JOURNAL OF ANIMAL PHYSIOLOGY AND ANIMAL NUTRITION

Oxidative stress and information content of black and yellow plumage coloration: an experiment with greenfinches

(2010) P. Horak et al.   JOURNAL OF EXPERIMENTAL BIOLOGY

Specific Appetite for Carotenoids in a Colorful Bird

(2010) Juan Carlos Senar et al.   PLoS One

Defining individual quality over lifetimes and selective contexts

(2010) S. P. Lailvaux et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Carotenoids in evolutionary ecology: re-evaluating the antioxidant role

(2009) Lorenzo Pérez-Rodríguez   BIOESSAYS

Food Color Preferences of Molting House Finches (Carpodacus mexicanus) in Relation to Sex and Plumage Coloration

(2009) Ana L. Bascuñán et al.   ETHOLOGY

Dynamics of PHA-induced immune response and plasma carotenoids in birds: should we have a closer look?

(2009) C. Biard et al.   JOURNAL OF EXPERIMENTAL BIOLOGY

Identifying anatomical sites of carotenoid metabolism in birds

(2009) Kevin J. McGraw   NATURWISSENSCHAFTEN

What is individual quality? An evolutionary perspective

(2009) Alastair J. Wilson et al.   TRENDS IN ECOLOGY & EVOLUTION

Oxidative stress as a mediator of life history trade-offs: mechanisms, measurements and interpretation

(2008) Pat Monaghan et al.   ECOLOGY LETTERS

Carotenoids are minor antioxidants for birds

(2008) D. Costantini et al.   FUNCTIONAL ECOLOGY

Condition dependence of nestling mouth colour and the effect of supplementing carotenoids on parental behaviour in the hihi (Notiomystis cincta)

(2008) John G. Ewen et al.   OECOLOGIA

Oxidative stress does not influence carotenoid mobilization and plumage pigmentation

(2007) C. Isaksson et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES