Die experimentelle Rotfärbung des Gefieders beim Fichtenkreuzschnabel(Loxia curvirostra)

Völker, Otto

doi:10.1007/bf01676225

Cited by 26 publications

(23 citation statements)

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“…Plasma carotenoid levels are commonly positively related to bill redness in birds, including zebra finches (McGraw 2006 Blas et al 2014). Biotransformation of substrate carotenoids involves oxidation of hydroxycarotenoids by ketolases, which could be affected by the oxidative metabolism of each bird (Völker 1957;Johnson and Hill 2013). We may propose that higher oxidative stress in adult BSOtreated birds (see fig.…”

Section: Discussionmentioning

confidence: 99%

The Level of an Intracellular Antioxidant during Development Determines the Adult Phenotype in a Bird Species: A Potential Organizer Role for Glutathione

Romero-Haro

Alonso‐Álvarez

2015

The American Naturalist

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Online enhancement: appendix. Dryad data: http://dx.doi.org/10.5061/dryad.1rd58.abstract: Life-history traits are often involved in trade-offs whose outcome would depend on the availability of resources but also on the state of specific molecular signals. Early conditions can influence trade-offs and program the phenotype throughout the lifetime, with oxidative stress likely involved in many taxa. Here we address the potential regulatory role of a single intracellular antioxidant in lifehistory trade-offs. Blood glutathione levels were reduced in a large sample of birds (zebra finch Taeniopygia guttata) during development using the synthesis inhibitor buthionine sulfoximine (BSO). Results revealed several modifications in the adult phenotype. BSO-treated nestlings showed lower glutathione and plasma antioxidant levels. In adulthood, BSO birds endured greater oxidative damage in erythrocytes but stronger expression of a sexual signal. Moreover, adult BSO females also showed weaker resistance to oxidative stress but were heavier and showed better body condition. Results suggest that low glutathione values during growth favor the investment in traits that should improve fitness returns, probably in the form of early reproduction. Higher oxidative stress in adulthood may be endured if this cost is paid later in life. Either the presence of specific signaling mechanisms or the indirect effect of increased oxidative stress can explain our findings.

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Section: Discussionmentioning

confidence: 99%

The Level of an Intracellular Antioxidant during Development Determines the Adult Phenotype in a Bird Species: A Potential Organizer Role for Glutathione

Romero-Haro

Alonso‐Álvarez

2015

The American Naturalist

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“…In captivity, white‐winged crossbills, like many other cardueline finches, will grow yellow plumage when lutein and zeaxanthin are the only carotenoids available in the diet (Stradi et al 1996, 2001). Only when other non‐xanthophyll carotenoids are fed to crossbills during molt will these birds grow red plumage (Volker 1957, Hill and Benkman 1995, Stradi et al 2001). We discovered that three non‐xanthophyll carotenoids‐β‐cryptoxanthin, rubixanthin, and gazaniaxanthin‐were highly seasonally variable in crossbill plasma and occurred around the time of molt.…”

Section: Discussionmentioning

confidence: 99%

“…Instead, fruits and vegetables are thought to be the source of most non‐xanthophyll carotenoids in the diets of land animals (Goodwin 1984, Rodriguez‐Amaya 2001). White‐winged crossbills are not commonly reported to ingest fruits (e.g., occasionally juniper berries during irruptions; Benkman 1992) and Volker (1957), considered it unlikely that the diet of common crossbills Loxia curvirostra contains any red carotenoid. Yet, a unique feature of the carotenoid profile of white‐winged crossbills during molt suggests that they acquire fruit‐derived carotenoids.…”

Section: Discussionmentioning

confidence: 99%

“…We were interested in testing whether plasma carotenoid profiles parallel age and sex differences in coloration, and whether carotenoid status shifts seasonally to coincide with the need to deposit pigments in feathers during molt. Several biochemical studies have reported that female and young male White‐winged crossbills develop their yellow plumage by acquiring two xanthophyll carotenoids from the diet‐lutein and zeaxanthin‐and metabolically transforming them into two other yellow carotenoids‐canary xanthophylls A and B‐that are deposited in feathers (Volker 1957, Weber 1953, Stradi 1998, 1999, Stradi et al 1996). In contrast, adult male L. leucoptera , and occasionally some young males, develop their rich red coloration by ingesting different non‐xanthophyll dietary precursors and metabolically transforming them into five red pigments that appear in feathers: 3‐hydroxy‐echinenone, 4‐oxo‐rubixanthin, 4‐oxo‐gazaniaxanthin, astaxanthin, and adonirubin, as well as small amounts of yellow pigments (e.g., canary xanthophylls, lutein; Volker 1957, Weber 1953, Stradi 1998, 1999, Stradi et al 1996).…”

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confidence: 99%

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Season‐, sex‐, and age‐specific accumulation of plasma carotenoid pigments in free‐ranging white‐winged crossbills Loxia leucoptera

Deviche¹,

McGraw²,

Underwood³

2008

Journal of Avian Biology

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Many birds acquire carotenoid pigments from foods and deposit these pigments into feathers and bare-parts to become sexually attractive, but little work has been done on the interindividual and temporal variability in the types and amounts of carotenoids that free-ranging individuals have available for use in coloration or other functions (e.g., in immunomodulation). To address this issue, we studied intra-annual variation in plasma carotenoid profiles of juvenile and adult white-winged crossbills Loxia leucoptera of both sexes. Adult male crossbills exhibit bright red carotenoid-based plumage pigmentation, whereas females uniformly display drab yellow feather coloration and juvenile males only occasionally display some orange or pink color. Yellow xanthophylls (e.g., lutein, zeaxanthin) were predominant in plasma of birds from both sexes and age classes throughout the year. Plasma xanthophylls levels tended to be highest in the summer, when crossbills increase seed consumption for breeding as well as supplement their diet with insects. Blood accumulation of three other, less common plasma carotenoids-b-cryptoxanthin, rubixanthin, and gazaniaxanthin-varied in a highly season-, sex-, and age-dependent fashion. These carotenoids were virtually absent in juvenile or adult female plasma at all times of year and were only present in male plasma, at higher concentrations in adults than juveniles, during the period of feather growth (Sept.ÁNov.). These pigments have been reported as valuable precursors of the metabolically derived red pigments (e.g., 3-hydroxy-echinenone, 4-oxo-rubixanthin, and 4-oxo-gazaniaxanthin, respectively) that appear in the plumage of male crossbills. These findings suggest that male crossbills either adopt a season-specific foraging strategy to acquire foods rich in these pigments at the time they are needed to develop red coloration, or have a unique physiological ability to metabolically produce these pigments or absorb them from food during molt, in order to maximize color production.

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“…Maintenance of the pink and red colours of Hamingo and Scarlet ibis Eudocinius ruber were among the first successful experiments (Conway, 1958;Conway, 1959;Volker, 1957;Volker, 1958). Many substances have been used with varying success and include ground Carrots, carrot juice, grated beetroots, seaweed meal, ground lobster and shrimp shells, and sweet peppers as well as some synthetic carotenoids (Poulsen, 1960).…”

Section: Assistant Curator New York Zoological Park Bronx New Yorkmentioning

confidence: 99%

Use of canthaxanthin to maintain the natural colour of captive birds at Bronx Zoo

Bruning¹

1971

International Zoo Yearbook

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Die experimentelle Rotfärbung des Gefieders beim Fichtenkreuzschnabel(Loxia curvirostra)

Cited by 26 publications

References 3 publications

The Level of an Intracellular Antioxidant during Development Determines the Adult Phenotype in a Bird Species: A Potential Organizer Role for Glutathione

The Level of an Intracellular Antioxidant during Development Determines the Adult Phenotype in a Bird Species: A Potential Organizer Role for Glutathione

Season‐, sex‐, and age‐specific accumulation of plasma carotenoid pigments in free‐ranging white‐winged crossbills Loxia leucoptera

Use of canthaxanthin to maintain the natural colour of captive birds at Bronx Zoo

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