Variation in spectral reflectance among populations of Dendrobates pumilio, the strawberry poison frog, in the Bocas del Toro Archipelago, Panama
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Date
2003-01-14
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Citation of Original Publication
Kyle Summers ,Thomas W. Cronin , Timothy Kennedy , Variation in spectral reflectance among populations of Dendrobates pumilio, the strawberry poison frog, in the Bocas del Toro Archipelago, Panama, Journal of Biogeography, 30, 35-53, https://doi.org/10.1046/j.1365-2699.2003.00795.x
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain Mark 1.0
Abstract
Aim: The goal of this study was to quantify levels of variation in spectral reflectance
within and among populations of Dendrobates pumilio, the strawberry poison frog from
the Bocas del Toro Archipelago.
Location: This study was carried out in the Bocas del Toro Archipelago, in the Republic
of Panama, Central America.
Methods: Spectral reflectance was measured for samples of individuals from fifteen
distinct island and mainland populations, using an Ocean Optics 2000 spectrometer and
a BiLink portable computer.
Results: Our results provide quantitative evidence for extreme polymorphism among
populations, and more limited levels of polymorphism within some populations. No
obvious signs of sexual dimorphism were found. All the colour morphs appear to have
relatively little reflectance in the ultraviolet part of the spectrum. There is some evidence
for clinal variation in colour and pattern across some mainland populations. There is
also at least one area where distinctly different morphs occur in sympatry, suggesting the
possibility of incipient reproductive isolation. We argue that variation in coloration may
have been enhanced by sexual selection.