3.1.2. Fed Gnathiids

For fed individuals, the numbers of gnathiids per juvenile stage and per temperature were also relatively even between the 29 ◦C, 31 ◦C, and 32 ◦C temperature treatments (stage one: 8, 6, 6; stage two: 17, 15, 13; stage three: 8, 7, 7, respectively). Three (3.4%) contained more blood than clear material (i.e., plasma) in their gut, the remainder had a clear gut. Of the 87 individuals followed, 60% had molted during the course of the study. Survival differed according to an interaction between temperature and juvenile stage (*p* = 0.0085, Table 2); when further explored separately by stage (Figure 2), the effect of temperature was significant for stage two (*p* < 0.0001), and three (*p* = 0.0009, Figure 2b,c, Table S10b,c), with the strongest effect of temperature being that between the baseline (29 ◦C) and the 32 ◦C treatments for stage three (Table S10c, Figure 2c). Survival differed according to an interaction between temperature and headwidth (*p* = 0.0480, Table 2); when further explored separately by temperature treatment, the effect of headwidth was largely due to non-significant weakly positive relationships between survival and headwidth at 29 ◦C (*p* = 0.0758) and 32 ◦C (*p* = 0.0718, Table S11a,c).

**Figure 1. Lizard Island Research Station**; Kaplan-Meier survival curves for unfed gnathiids per temperature treatment. Shaded areas are 95% confidence intervals.

**Figure 2.** *Cont.*

**Figure 2. Great Barrier Reef;** Kaplan-Meier survival curves for fed gnathiids per temperature treatment for (**a**) stage one, (**b**) stage two, and (**c**) stage three juveniles. For ease of interpretation, 95% confidence intervals are not included.

**Table 2. Great Barrier Reef;** Analysis of deviance table (Type II tests) for fed gnathiid survival among temperature treatments and juvenile stages for Cox model. Bolded values are ones mentioned in main text. \*\* *p* < 0.01, \*\*\* *p* < 0.001.

