Ongoing niche differentiation under high gene flow in a polymorphic brackish water threespine stickleback (Gasterosteus aculeatus) population

Table 5 General linear mixed models of counts of the parasitic copepod T. Gasterostei and counts of Trematoda spp. cysts with predictor variables for the threespined stickleback in Lake Engervann. - denote non-reported values

Test	Parameter	Estimate ± se	Df	χ2	P
Number of T. gasterostei (Poisson distribution, log link)	Intercept	3.524 ± 0.724	–	–	< 0.001
χ² = 231.92	Sampling area	−0.078 ± 0.028	1	7.80	0.005
N = 236	Sampling date	0.055 ± 0.030	1	3.30	0.069
P < 0.001	Sex	0.072 ± 0.031	1	5.27	0.022
Df = 10	Lateral plate morph - CPM*	0.030 ± 0.046	1	0.46*	0.796*
	Lateral plate morph - LPM*	−0.032 ± 0.053	1	–	–
	Gill raker number	−0.073 ± 0.019	1	15.01	< 0.001
	3rd gill-raker length	−0.676 ± 0.220	1	9.54	0.002
	δ¹⁵N	−0.193 ± 0.024	1	67.69	< 0.001
	δ¹³C	0.033 ± 0.021	1	2.52	0.112
	Body length	0.668 ± 0.082	1	64.78	< 0.001
Number of Trematoda spp. (Poisson distribution, log link)	Intercept	−0.458 ± 0.583	–	–	0.431
χ² = 784.95	Sampling area	0.114 ± 0.024	1	23.12	< 0.001
N = 236	Sampling date	−0.116 ± 0.025	1	20.99	< 0.001
P < 0.001	Sex	−0.063 ± 0.026	1	5.913	0.015
Df = 10	Lateral plate morph - CPM#	0.214 ± 0.037	1	39.25#	< 0.001#
	Lateral plate morph - LPM#	−0.266 ± 0.048	1	–	–
	Gill raker number	0.009 ± 0.015	1	0.410	0.524
	3rd gill-raker length	0.566 ± 0.173	1	10.68	0.001
	δ¹⁵N	0.190 ± 0.026	1	55.58	< 0.001
	δ¹³C	0.137 ± 0.018	1	56.81	< 0.001
	Body length	0.365 ± 0.073	1	24.67	< 0.001

for * and # the presented χ2-values and P-values are only reported jointly for the three classes of the lateral plate morphs (CPM Completely plated, PPM Partially plated, LPM Lowplated) while parameter values reported separately for CPM and LPM

ISSN: 2730-7182