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. 2014 Feb 10;9(2):e88370. doi: 10.1371/journal.pone.0088370

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© 2014 Soto et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Mean relative performance (and 95 % confidence intervals) as a function of concentration for a) D. buzzatii and b) D. koepferae reared in medium with the alkaloid fraction (black symbols) or the non-alkaloid fraction (white symbols) extracted from the columnar cactus T. terschekii. Linear trends are shown.