Table 1.

Proportion of newly recruited age-0 lionfish ($\hat{\mathrm{P}}$) among northern Gulf of Mexico lionfish population samples during 2014–2018. Differences in $\hat{\mathrm{P}}$ were tested with a binomial generalized linear model (GLM) for month nested within year. Experimental units were sampling events weighted by logged number of lionfish sampled per month. GLM outputs show the logit-linked parameter estimates for $\hat{\mathrm{P}}$, 95% confidence intervals (CI) around $\hat{\mathrm{P}}$, z-score (z), and p-values (P). Hypothesis testing (z- and p-values) for differences in $\hat{\mathrm{P}}$ prior to disease emergence (May–Oct 2014 and May 2015–2017) are relative to the intercept (May 2014). Hypotheses testing of $\hat{\mathrm{P}}$ during May–Oct 2018 are relative to the same sampling month in 2014.

Sampling date		Sampling events (#)	Lionfish sampled	Proportion Age-0 ($\hat{\mathrm{P}}$)	95% CI	z	P
2014	May (Intercept)	19	1,914	0.39	0.24–0.63	−3.85	<0.001
2014	Jun	7	678	0.34	0.13–0.87	−0.30	0.765
2014	Jul	9	788	0.33	0.14–0.80	−0.36	0.722
2014	Aug	9	1,022	0.30	0.12–0.73	−0.56	0.574
2014	Sep	9	870	0.21	0.08–0.56	−1.23	0.219
2014	Oct	11	2,225	0.12	0.05–0.32	−2.39	0.017
2015	May	7	887	0.21	0.08–0.60	−1.14	0.255
2016	May	18	8,120	0.21	0.10–0.43	−1.73	0.084
2017	May	14	3,868	0.26	0.12–0.55	−1.07	0.287
2018	May	20	8,500	0.06	0.02–0.16	−3.83	<0.001
2018	Jun	5	662	0.05	0.01–0.46	−1.81	0.070
2018	Jul	2	417	0.07	0.01–1.06	−1.19	0.235
2018	Aug	3	939	0.09	0.02–0.76	−1.26	0.207
2018	Sep	2	502	0.12	0.03–1.76	−0.54	0.590
2018	Oct	5	543	0.17	0.13–2.34	0.48	0.629