Ampliando el conocimiento

Daniel Torrico-Bazoberry, Carlos F. Pinto, Luis Flores-Prado, Francisco E. Fontúrbel & Hermann M. Niemeyer
Editorial: Springer Science+Business Media Dordrecht
Año: 2016
Páginas: 9
ISSN: 1872-8855




Abstract The pronotum is the most distinctive and representative structure in treehoppers. Although several functions have been proposed for this structure, its involvement in fitness has not been formally evaluated. Given the high degree of maternal investment exhibited by the subsocial membracid Alchisme grossa (Hoplophorionini), the pronotum has been suggested as a shield for offspring protection. We performed selection gradient analyses on A. grossa in order to evaluate how natural selection is acting upon two traits associated with this structure considering three different fitness proxies: (1) number of eggs, (2) the ratio between the number of firststage nymphs and the number of eggs (early survival), and (3) the number of third-stage nymphs (late survival). Since A. grossa feeds, oviposits and mates on two alternative host-plants (Brugmansia suaveolens and Solanum ursinum, both Solanaceae), we also evaluated and compared selection gradients between these host-plants. We found positive


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