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Molar percentages of choline (Cho) and glycine betaine (Bet) in water extracts of webs built by feeding and starving/resumed feeding groups. Purple diamonds: juvenile male Araneus cavaticus; green triangles: juvenile female A. cavaticus; red circles: adult female A. cavaticus; blue squares: adult female Argiope aurantia; open circles: adult female Argiope trifasciata.
