Geographic and temporal variation of cardenolide-based chemical defenses of queen butterfly (Danaus gilippus) in northern Florida

The cardenolide-based chemical defenses of danaine butterflies vary macrogeographically. This study demonstrates that these defenses also vary both microgeographically and temporally. We sampled 280 queen butterflies (Danaus gilippus) at 11 sites in northern Florida during the summer of 1993 and det...

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Bibliographic Details
Published in:Journal of chemical ecology 1998-05, Vol.24 (5), p.905-932
Main Authors: Moranz, R. (Sweet Briar College, Sweet Briar, VA.), Brower, L.P
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
APPETABILITE
Autoecology
BEHAVIOUR
Biological and medical sciences
Butterflies & moths
CARDIAC GLYCOSIDES
CHEMICAL COMPOSITION
Chromatography
COMPORTAMIENTO
COMPORTEMENT
COMPOSICION QUIMICA
COMPOSITION CHIMIQUE
DANAUS
FLORIDA
FLORIDE
Fundamental and applied biological sciences. Psychology
GEOGRAPHICAL VARIATION
GLICOSIDOS
GLYCOSIDE
GLYCOSIDES
Host plants
LACTONAS
LACTONE
LACTONES
MIMICRY
PALATABILIDAD
PALATABILITY
Predators
Protozoa. Invertebrata
SEASONAL VARIATION
Thin layer chromatography
VARIACION ESTACIONAL
VARIATION SAISONNIERE
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Summary:The cardenolide-based chemical defenses of danaine butterflies vary macrogeographically. This study demonstrates that these defenses also vary both microgeographically and temporally. We sampled 280 queen butterflies (Danaus gilippus) at 11 sites in northern Florida during the summer of 1993 and determined their cardenolide concentrations and thin-layer chromatography profiles. Queens captured in coastal salt marshes and xeric inland sites were low in cardenolide concentration, while those from hydric inland sites had much higher concentrations. Concentrations also varied temporally, especially at the coastal sites. Thin-layer chromatography analyses of wild-captured queens and those reared on local milkweeds indicated that microgeographic and temporal variation in the cardenolide chemistry of the butterflies is mediated by their host plants. The large differences in cardenolide concentrations among queen populations must result in strong differences in palatability spectra to vertebrate predators. This finding has major implications both for interspecific mimicry and for automimicry
ISSN:0098-0331
1573-1561
DOI:10.1023/A:1022329702632