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  • Isolation  (1)
  • fish  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Isolation and characterization of mutatoxanthin-epimers from red paprika (Capsicum annuum) (2000)
    Springer
    European food research and technology 211 (2000), S. 396-399 
    Details
    ISSN: 1438-2385
    Schlagwort(e): Key words Capsicum annuum ; Carotenoids ; Isolation ; Structure elucidation ; (3S ; 5R ; 8R ; 3′R)-mutatoxanthin ; (3S ; 5R ; 8S ; 3′R)-mutatoxanthin
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Abstract  (3S,5R,8R,3′R)- and (3S,5R,8S,3′R)-mutatoxanthin were isolated from red spice paprika (Capsicum annuum) and characterized by their UV-VIS, CD, 1H-NMR, 13C-NMR and mass spectra.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002170000195
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Different Carotenoids and Potential Information Content of Red Coloration of Male Three-Spined Stickleback (1998)
    Springer
    Journal of chemical ecology 24 (1998), S. 787-801 
    Details
    ISSN: 1573-1561
    Schlagwort(e): Breeding coloration ; Gasterosteus aculeatus ; stickleback ; fish ; multiple ornaments ; signalling ; carotenoids ; astaxanthin ; tunaxanthin ; lutein
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract Female sticklebacks (Gasterosteus aculeatus) use the red coloration of males as a criterion for mate choice. Redder males are more attractive. However, males often differ not only in the intensity of their coloration (from dull to bright red) but also in color quality (from yellowish to purple-red). We investigated whether the red coloration of the stickleback is actually a multiple signal made by several pigments. We kept wild caught males singly in tanks until they had built a nest and were ready to accept females. Then, we took standard photographs and measured their colors by spectrometer analyses of the slides and by descriptions of human observers. These two measurements were highly correlated. When analyzing the carotenoid content of the sticklebacks' skin we found two groups of carotenoids (astaxanthin and tunaxanthin/lutein) that were quantified for each individual. The differences in color observed in the fish are correlated to this pigment quantification. Redder fish have more astaxanthin in their skin than yellowish fish, while the color of the yellowish fish appears to be made by tunaxanthin/lutein. Our results suggest that the red coloration of sticklebacks is a multiple trait that is made of at least two different carotenoids. This opens the possibility that male sticklebacks signal more detailed information to females than a one-dimensional trait would allow.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1022365315836
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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