Data from: The evolution of chemical defenses along invasion routes: Harmonia axyridis Pallas (Coccinellidae: Coleoptera) as a case study

Alexandra Magro, Felipe Ramon-Portugal, Benoît Facon, Christine Ducamp & Jean-Louis Hemptinne
The Evolution of Increased Competitive Ability (EICA) hypothesis (Blossey & Nötzold, 1995) postulates that escaping from coevolved enemies increases invaders fitness by energy reallocation from defenses and immunity to growth and reproduction. In this context, we evaluated the evidence of evolutionary change in invasive populations of Harmonia axyridis Pallas (Coccinellidae: Coleoptera). We measured egg defenses – cocktail of hydrocarbons on the egg’s surface flagging egg toxicity, and the concentration of the main alkaloid harmonine -...
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