Isotopic (stable isotopes) dietary overlap between gastropods in three coastal lakes of Maputaland.

aT. granifera = shell height ≥10 mm; T. granifera juveniles = shell height ≤5 mm; all other gastropods were adults.Locations are Catalina Bay (CB) in the St. Lucia Estuary, Lake Sibaya (LS) and Lake Nhlange (LN) in Kosi Lakes. Isotopic dietary overlap (IDO, %) values over 60% indicate significant overlap and a value of 100% indicates absolute overlap.

成体粒椎实螺（T. granifera）的壳高≥10 mm；粒椎实螺幼体的壳高≤5 mm；其余所有腹足类（gastropods）均为成体。采样地点为科西湖群（Kosi Lakes）内的圣卢西亚河口卡塔利娜湾（Catalina Bay, CB）、西巴亚湖（Lake Sibaya, LS）以及恩兰盖湖（Lake Nhlange, LN）。同位素饮食重叠率（Isotopic Dietary Overlap, IDO，%）的数值若超过60%，即表明存在显著饮食重叠；若数值为100%，则代表完全饮食重叠。