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Astaxanthin is the major carotenoid in tissues of white storks (Ciconia ciconia) feeding on introduced crayfish (Procambarus clarkii).
Negro JJ, Garrido-Fernández J. Negro JJ, et al. Comp Biochem Physiol B Biochem Mol Biol. 2000 Jul;126(3):347-52. doi: 10.1016/s0305-0491(00)00180-2. Comp Biochem Physiol B Biochem Mol Biol. 2000. PMID: 11007176
Diet explains interpopulation variation of plasma carotenoids and skin pigmentation in nestling white storks.
Negro JJ, Tella JL, Blanco G, Forero MG, Garrido-Fernández J. Negro JJ, et al. Physiol Biochem Zool. 2000 Jan-Feb;73(1):97-101. doi: 10.1086/316724. Physiol Biochem Zool. 2000. PMID: 10685911
Coprophagy: an unusual source of essential carotenoids.
Negro JJ, Grande JM, Tella JL, Garrido J, Hornero D, Donázar JA, Sanchez-Zapata JA, BenItez JR, Barcell M. Negro JJ, et al. Nature. 2002 Apr 25;416(6883):807-8. doi: 10.1038/416807a. Nature. 2002. PMID: 11976670
Ecological, morphological and phylogenetic correlates of interspecific variation in plasma carotenoid concentration in birds.
Tella JL, Figuerola J, Negro JJ, Blanco G, Rodríguez-Estrella R, Forero MG, Blázquez MC, Green AJ, Hiraldo F. Tella JL, et al. Among authors: negro jj. J Evol Biol. 2004 Jan;17(1):156-64. doi: 10.1046/j.1420-9101.2003.00634.x. J Evol Biol. 2004. PMID: 15000658
Nutritional condition and serum biochemistry for free-living Swainson's Hawks wintering in central Argentina.
Sarasola JH, Negro JJ, Travaini A. Sarasola JH, et al. Among authors: negro jj. Comp Biochem Physiol A Mol Integr Physiol. 2004 Apr;137(4):697-701. doi: 10.1016/j.cbpb.2004.02.001. Comp Biochem Physiol A Mol Integr Physiol. 2004. PMID: 15123177
Function and occurrence of facial flushing in birds.
Negro JJ, Sarasola JH, Fariñas F, Zorrilla I. Negro JJ, et al. Comp Biochem Physiol A Mol Integr Physiol. 2006 Jan;143(1):78-84. doi: 10.1016/j.cbpa.2005.10.028. Epub 2005 Dec 5. Comp Biochem Physiol A Mol Integr Physiol. 2006. PMID: 16337158
Hybridization between white-headed ducks and introduced ruddy ducks in Spain.
Muñoz-Fuentes V, Vilà C, Green AJ, Negro JJ, Sorenson MD. Muñoz-Fuentes V, et al. Among authors: negro jj. Mol Ecol. 2007 Feb;16(3):629-38. doi: 10.1111/j.1365-294X.2006.03170.x. Mol Ecol. 2007. PMID: 17257118
Melanin-based color variation in the Bearded Vulture suggests a thermoregulatory function.
Margalida A, Negro JJ, Galván I. Margalida A, et al. Among authors: negro jj. Comp Biochem Physiol A Mol Integr Physiol. 2008 Jan;149(1):87-91. doi: 10.1016/j.cbpa.2007.10.017. Epub 2007 Nov 7. Comp Biochem Physiol A Mol Integr Physiol. 2008. PMID: 18060818
Multiple ways to become red: pigment identification in red feathers using spectrometry.
Toral GM, Figuerola J, Negro JJ. Toral GM, et al. Among authors: negro jj. Comp Biochem Physiol B Biochem Mol Biol. 2008 Jun;150(2):147-52. doi: 10.1016/j.cbpb.2008.02.006. Epub 2008 Mar 4. Comp Biochem Physiol B Biochem Mol Biol. 2008. PMID: 18378172
Porphyrins and pheomelanins contribute to the reddish juvenal plumage of black-shouldered kites.
Negro JJ, Bortolotti GR, Mateo R, García IM. Negro JJ, et al. Comp Biochem Physiol B Biochem Mol Biol. 2009 Jul;153(3):296-9. doi: 10.1016/j.cbpb.2009.03.013. Epub 2009 Apr 5. Comp Biochem Physiol B Biochem Mol Biol. 2009. PMID: 19351566
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