Fig. 2: Predation risk to mysids inside and outside of longfin damselfish farms.
From: Domestication via the commensal pathway in a fish-invertebrate mutualism
Comparative responses by predatory fishes towards clear plastic bags containing either 150 ‘imitation’ mysid shrimps, 150 live mysid shrimps, or an empty seawater control, when placed inside (blue) versus outside (yellow) of longfin damselfish (Stegastes diencaeus) farms. Responses are: (a) number of strikes by predatory fishes on each bag (significant interaction between location and treatment (zero-inflated GLMM): \(\chi _2^2\) = 7.2, P = 0.028), (b) number of predatory fish species that struck at each bag (significant effect of location (GLMM): \(\chi _1^2\) = 17.6, P < 0.001; significant effect of treatment (GLMM): \(\chi _2^2\) = 81, P < 0.001) and (c) number of individual predators that struck at each bag (significant effect of location (negative binomial GLMM): \(\chi _1^2\) = 51.01, P < 0.001; significant effect of treatment (negative binomial GLMM): \(\chi _2^2\) = 253.71, P < 0.001). Experiments were conducted at 30 damselfish farms, with n = 30 trials inside the farm and n = 30 trials conducted outside of the farm. Asterisks indicate significant differences (P < 0.05 = *, P < 0.01 = **, P < 0.001 = ***) and all posthoc tests included mvt corrections. Boxplots show median values (horizontal lines), interquartile range (boxes), and minimum and maximum values (whiskers).
