Figure legends
Figure 1. Simulation model outputs with discrete host mortality(Eq. 1) showing failure and success of varying predator density (N m–2) for projected snail host density (N L–1, purple solid line), human-infectious cercariae density (N 0.1 L–1, red line), resource density (mg C L–1, green line), and infected snail host density (N L–1, purple dashed line) for periphyton algae (r = 0.25 d–1) over the 150-day transmission season: A) no predators (0 N m–2), B) intermediate predator stocking density (10 N m–2), and C) high predator stocking density (15 N m–2). D) Mean (±SE) cumulative human-infectious cercariae density (N L) for predator stocking densities of 0–15 and 20 N m–2. Letters represent cumulative cercariae density for top panel figures. Baseline host mortality rate hb = 0.001 d–1.
Figure 2. Simulation model outputs with discrete host mortality(Eq. 1) showing failure and success of varying predator density (N m–2) for projected snail host density (N L–1, purple solid line), human-infectious cercariae density (N 0.1 L–1, red line), resource density (mg C L–1, green line), and infected snail host density (N L–1, purple dashed line) for a detritus resource subsidy (det = 0.25 mg C L–1d–1) over the 150-day transmission season: A) no predators (0 N m–2), B) intermediate predator stocking density (7 N m–2), and C) high predator stocking density (15 N m–2). D) Mean (±SE) cumulative human-infectious cercariae density (N L) for predator stocking densities of 0–15 and 20 N m–2. Letters represent cumulative cercariae density for top panel figures. Baseline host mortality ratehb = 0.001 d–1.
Figure 3. Mean (±SE) cumulative cercariae density (N L) withdiscrete host mortality (Eq. 1) under increasing predator stocking densities (0–15, 20, 25, and 30 N m–2) targeting infected host size cohorts of 0–5, 0–10, 0–15, 0–25, and 0–50 mm for A) algae (0.25 d–1) and B) detritus (0.25 mg C L–1 d–1). The 0–50 mm host size cohort represents non-discriminate host mortality (all possible host sizes) and is the same output in Fig. 1D and Fig. 2D for algae and detritus, respectively. Size cohorts capture the entire size distribution of the host lifecycle.
Figure 4. Mean (±SE) cumulative cercariae density (N L) withcontinuous host mortality (Eq. 2) under increasing log + 1 predator stocking densities (N m–2) for non-discriminate host predation (0–50 mm hosts) for varying resource productivity levels of 0, 0.01, 0.05, 0.1, 0.2, and 0.25 for A) algae (d–1) and B) detritus (mg C L–1d–1). Dotted line represents the current recommended predator density from (Sokolow, Lafferty, and Kuris 2014). Dashed line represents current maximum stocking densities of aquaculture river prawns Macrobrachium  rosenbergii  from http://www.aquacultureoftexas.com/tanks.htm.