Fig. 1: Study system and mysid olfactory preferences.
From: Domestication via the commensal pathway in a fish-invertebrate mutualism
(a) The longfin damselfish, Stegastes diencaeus, (b) detail of algal ‘farm’, comprised of both turf-algae and brown algae (Ochrophyta), including Dictyota and Padina, (c) swarm of mysid shrimps, Mysidium integrum. (d) Proportion of time mysids spent in water sources containing either an olfactory cue (purple) or blank seawater (white) during two-channel choice flume experiments. Cues were (left to right), the proposed domesticator (longfin damselfish, S. diencaeus) (Wilcoxon signed-rank test: V = 358, P = 0.002, n = 30 trials), a mysid predator (slippery dick, Halichoeres bivittatus) (Paired t-test: t29 = −2.2, P = 0.033, n = 30 trials), a related non-mysid-associated damselfish (bicolor damselfish, Stegastes partitus) (Paired t-test: t29 = −0.4, P = 0.727, n = 30 trials), and farmed algae (Paired t-test: t29 = 0.3, P = 0.784, n = 30 trials). A different mysid shrimp individual was used in each trial. Asterisks indicate significant differences (P < 0.05 = *, P < 0.01 = **, P < 0.001 = ***). Boxplots show median values (horizontal lines), interquartile range (boxes), and minimum and maximum values (whiskers).
