Carotenoid concentration in barn swallow eggs is influenced by laying order, maternal infection and paternal ornamentation
Identifieur interne : 000320 ( France/Analysis ); précédent : 000319; suivant : 000321Carotenoid concentration in barn swallow eggs is influenced by laying order, maternal infection and paternal ornamentation
Auteurs : Nicola Saino [Italie] ; Vittorio Bertacche [Italie] ; Raffaella Paola Ferrari [Italie] ; Roberta Martinelli [Italie] ; Anders Pape M Amp Oslash Ller [France] ; Riccardo Stradi [Italie]Source :
- Proceedings of the Royal Society B: Biological Sciences [ 0962-8452 ] ; 2002.
Abstract
Carotenoids are critical to embryonic development, immunity and protection from oxidative stress. Transmission of carotenoids to the eggs may affect development and maturation of immunity in offspring, but carotenoids may be available to females in limiting amounts. Females may thus transfer carotenoids to the eggs differentially in relation to the reproductive value of the offspring as affected by sexual ornamentation of their father. In this study of maternal allocation of carotenoids to the eggs in the barn swallow (Hirundo rustica), females whose immune system had been experimentally challenged with an antigen had smaller lutein concentrations in their eggs than controls. We manipulated the size of a secondary sexual character (tail length) of males, and analysed the effect of manipulation on allocation of lutein to eggs by their vaccinated mates. Contrary to our prediction based on parental allocation theory, mates of tail–shortened males had a larger lutein concentration in their eggs compared with those of control and tail–elongated males. According to previous studies, offspring of short–tailed males have larger exposure and/or susceptibility to parasites. A larger lutein concentration in the eggs of females mated to males with experimentally reduced ornaments may thus reflect adaptive maternal strategies to enhance offspring viability.
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DOI: 10.1098/rspb.2002.2088
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stress. Transmission of carotenoids to the eggs may affect development and maturation of immunity in offspring, but carotenoids may be available to females in limiting amounts. Females may thus transfer carotenoids to the eggs differentially in relation to the reproductive value of the offspring as affected by sexual ornamentation of their father. In this study of maternal allocation of carotenoids to the eggs in the barn swallow (Hirundo rustica), females whose immune system had been experimentally challenged with an antigen had smaller lutein concentrations in their eggs than controls. We manipulated the size of a secondary sexual character (tail length) of males, and analysed the effect of manipulation on allocation of lutein to eggs by their vaccinated mates. Contrary to our prediction based on parental allocation theory, mates of tail–shortened males had a larger lutein concentration in their eggs compared with those of control and tail–elongated males. According to previous studies, offspring of short–tailed males have larger exposure and/or susceptibility to parasites. A larger lutein concentration in the eggs of females mated to males with experimentally reduced ornaments may thus reflect adaptive maternal strategies to enhance offspring viability.</div></front></TEI><affiliations><list><country><li>France</li><li>Italie</li></country><region><li>Île-de-France</li></region><settlement><li>Paris</li></settlement></list><tree><country name="Italie"><noRegion><name sortKey="Saino, Nicola" sort="Saino, Nicola" uniqKey="Saino N" first="Nicola" last="Saino">Nicola Saino</name></noRegion><name sortKey="Bertacche, Vittorio" sort="Bertacche, Vittorio" uniqKey="Bertacche V" first="Vittorio" last="Bertacche">Vittorio Bertacche</name><name sortKey="Ferrari, Raffaella Paola" sort="Ferrari, Raffaella Paola" uniqKey="Ferrari R" first="Raffaella Paola" last="Ferrari">Raffaella Paola Ferrari</name><name sortKey="Martinelli, Roberta" sort="Martinelli, Roberta" uniqKey="Martinelli R" first="Roberta" last="Martinelli">Roberta Martinelli</name><name sortKey="Saino, Nicola" sort="Saino, Nicola" uniqKey="Saino N" first="Nicola" last="Saino">Nicola Saino</name><name sortKey="Stradi, Riccardo" sort="Stradi, Riccardo" uniqKey="Stradi R" first="Riccardo" last="Stradi">Riccardo Stradi</name></country><country name="France"><region name="Île-de-France"><name sortKey="M Amp Oslash Ller, Anders Pape" sort="M Amp Oslash Ller, Anders Pape" uniqKey="M Amp Oslash Ller A" first="Anders Pape" last="M Amp Oslash Ller">Anders Pape M Amp Oslash Ller</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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