The Effect of Eimeria maxima on Broiler Pigmentation ,

Bletner, J. K.; Mitchell, Rosalyn; Tugwell, R. L.

doi:10.3382/ps.0450689

Cited by 45 publications

(20 citation statements)

References 9 publications

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“…Infection with Eimeria acervuUna has been shown to lower blood carotene levels van der Horst, 1969, 1972;Yvore and Mainguy, 1972;Marusich et al, 1972). Serum xanthophyll was also reduced by infection with E. maxima (Bletner et al, 1966;Stephens et al, 1967;Marusich et al, 1972), E. necatrix (Stephens, 1965), and E. brunetti (Kowalski and Reid, 1970). There are no reported laboratory studies on the effect of E. tenella and E. mivati on pigmentation.…”

Section: Introductionmentioning

confidence: 92%

Lowered Blood Carotenoid Levels in Chickens Infected with Coccidia

1974

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Chickens infected with any one of the six major species of chicken coccidia had lower levels of blood carotenoids (plasma pigmentation) than did uninoculated control birds. The species were Eimeria acervuUna, E. mivati, E. maxima, E. necatrix, E. brunetti, or E. tenella. Carotenoids decreased as early as 4 days postinoculation (PI) (E. acervuUna), but returned to a normal level by 14 days PI (E. mivati, E. acervuUna, and E. tenella). The maximum decrease occurred at 7 or 8 days PI in all species and was 49.8% with E. tenella and 62.4%-74.0% with the five intestinal species. Additional studies with E. tenella, E. acervuUna, and E. brunetti indicated that the magnitude of the decrease was related to the number of oocysts given within any one species. Increasing oocyst number also resulted in a more rapid reduction of longer duration in carotenoid levels.

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Section: Introductionmentioning

confidence: 92%

Lowered Blood Carotenoid Levels in Chickens Infected with Coccidia

1974

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“…Furthermore, experimental infection of chickens with coccidia depresses their skin coloration and carotenoid plasma levels (e.g. Bletner et al 1966;Ru¡ et al 1974). Therefore, the reduction in pigment concentration in bird tissues occurs because (i) parasitism depresses nestling condition and, as a side-e¡ect, reduces the retention of carotenoids in the storage tissues, (ii) the direct uptake by parasites reduces the amount of pigments available to the host or (iii) adaptive mobilization of carotenoids from the storage tissues prevents the use of carotenoids for other functions, as suggested for sexual signals (Shyko¡ & Widmer 1996).…”

Section: Discussionmentioning

confidence: 99%

Better red than dead: carotenoid-based mouth coloration reveals infection in barn swallow nestlings

Saino

Ninni

Calza

et al. 2000

Proc. R. Soc. Lond. B

136

127

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Nestling birds solicit food from their parents by displaying their open brightly coloured gapes. Carotenoids a¡ect gape colour, but also play a central role in immunostimulation. Therefore, we hypothesize that, by di¡erentially allocating resources to nestlings with more brightly coloured gapes, parents favour healthy o¡spring which are able to allocate carotenoids to gape coloration without compromising their immune defence. We demonstrated that, in the barn swallow Hirundo rustica, (i) parents di¡erentially allocate food to nestlings with an experimentally brighter red gape, (ii) nestlings challenged with a novel antigen (sheep red blood cells, SRBCs) have less bright gape colour than their control siblings, (iii) nestlings challenged with SRBCs but also provided with the principal circulating carotenoid (lutein) have more brightly coloured red gapes than their challenged but unsupplemented siblings and (iv) the gape colour of nestlings challenged with SRBCs and provisioned with lutein exceeds that of siblings that were unchallenged. This suggests that parents may favour nestlings with superior health by preferentially feeding o¡spring with the brightest gapes.

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“…Fox 1976Fox , 1979Goodwin 1984;Hudon and Brush 1990). The concentration of carotenoids in plasma or muscle tissue is generally positively correlated with the intensity of coloration of signals (Bletner et al 1966;Goodwin 1984;Hudon and Brush 1990;Hill et al 1994;Saino et al 1999). Carotenoids are limiting since addition of carotenoids to the diet greatly enhances the brightness of coloration (e.g.…”

Section: Introductionmentioning

confidence: 97%

“…Pale carotenoid-based coloration is often associated with parasitism (Zuk et al 1990;Houde and Torio 1992;Folstad et al 1994;Skarstein and Folstad 1996;Thompson et al 1997;see Møller et al 2000 for a review) and low health status (Dufva and Allander 1995;Skarstein and Folstad 1996;Saino et al 1999;see Møller et al 2000 for a review). Relatively moderate experimental infections with Coccidia have been shown to reduce the body content of carotenoids by up to 80% (Bletner et al 1966;Yvore and Mainguy 1972;Ruff et al 1974).…”

Section: Introductionmentioning

confidence: 99%

Carotenoid-based plumage coloration reflects hemoparasite infection and local survival in breeding great tits

et al. 2001

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Carotenoid-based sexual coloration has been hypothesised to be prevalent across many vertebrate taxa because it reliably reflects individual phenotypic quality in terms of foraging efficiency or health status due to the trade-off between signal colour and use of carotenoids for immune function and detoxification. We investigated the ventral, yellow coloration of breeding adult great tits (Parus major L.) in relation to sex, age, breeding habitat, local survival and infection status with respect to Haemoproteus blood parasites. The extent of plumage coloration (estimated as hue and lutein absorbance) was generally higher in rural than in urban birds. Males had higher values of hue than females. In both male and female yearlings, the plumage of unparasitised individuals had a greater hue of yellow than parasitised ones, while older males revealed the opposite pattern. The survival of infected yearlings was worse than that of uninfected yearlings, while the opposite was true for old breeders. Survivors had generally higher values of hue than non-survivors. These results are consistent with predictions of functional hypotheses, suggesting that carotenoid-based plumage coloration serves as a signal reflecting individual quality in terms of health status and local survival.

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The Effect of Eimeria maxima on Broiler Pigmentation ,

Cited by 45 publications

References 9 publications

Lowered Blood Carotenoid Levels in Chickens Infected with Coccidia

Lowered Blood Carotenoid Levels in Chickens Infected with Coccidia

Better red than dead: carotenoid-based mouth coloration reveals infection in barn swallow nestlings

Carotenoid-based plumage coloration reflects hemoparasite infection and local survival in breeding great tits

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