Figure 8From: Fluorescent sperm in a transparent worm: validation of a GFP marker to study sexual selectionSperm displacement in M. lignano . Means ± 1 SE of the number of first donor sperm, i.e. fluorescent sperm, stored in a GFP(-) individual before and after the presence of a second sperm donor (i.e. competition treatment - open circles), or twice without a second sperm donor (i.e. control treatment - filled circles). See text for statistics.Back to article page