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Sodium: stimulus for puddling behavior by tiger swallowtail butterflies, Papilio glaucus
Abstract:
Male Papilio glaucus butterflies are attracted to sand soaked with dillute aqueous solutions of sodium salts. A sodium ion concentration of 10(-3) molar is sufficient to stimulate puddling behavior. Acqlisition of sodiumn mnay be the main ecological function of pudding behavior.