The Company of Biologists

Table 1.

Means and standard errors of 18 EMG variables in Hydromantes imperialis with results of ANCOVA examining effects of individual, capture success, with prey distance as a covariate

			Individual			Capture success
	Mean	s.e.m.	F	P	F	P	F	P
SAR area (mV)
Posterior	1.747	0.069	4.290	0.0038	0.472	0.4946	8.185	0.0057
Middle	4.506	0.248	4.666	0.0023^{^*}	0.072	0.7897	62.206	<0.0001^{^*}
Anterior	4.452	0.344	38.657	< 0.0001^{^*}	1.099	0.2983	88.005	<0.0001^{^*}
SAR peak amplitude (mV)
Posterior	0.190	0.008	4.004	0.0058	0.120	0.7301	0.780	0.3803
Middle	0.557	0.022	6.385	0.0002^{^*}	0.065	0.7997	1.557	0.2166
Anterior	0.634	0.040	31.261	<0.0001^{^*}	0.282	0.5974	9.562	0.0029
SAR duration (s)
Posterior	0.115	0.004	6.417	0.0002^{^*}	4.947	0.0296	37.307	<0.0001^{^*}
Middle	0.106	0.004	3.228	0.0177	3.037	0.0861	64.784	<0.0001^{^*}
Anterior	0.085	0.004	2.292	0.0689	1.854	0.1781	111.174	<0.0001^{^*}
Relative duration (s)
Mid—post	0.009	0.002	2.157	0.0837	0.035	0.8527	14.820	0.0003^{^*}
Ant—mid	0.020	0.002	5.843	0.0004^{^*}	0.445	0.5069	2.300	0.1342
Ant—post	0.029	0.003	5.506	0.0007^{^*}	0.552	0.4603	20.020	<0.0001^{^*}
Relative onset (s)
Mid—post	0.009	0.001	0.390	0.8153	1.537	0.2195	35.336	<0.0001^{^*}
Ant—mid	0.008	0.001	3.197	0.0185	3.488	0.0663	43.587	<0.0001^{^*}
Ant—post	0.017	0.002	0.258	0.9038	0.061	0.8053	57.779	<0.0001^{^*}
Relative peak (s)
Mid—post	0.000	0.002	5.125	0.0012^{^*}	1.166	0.2842	6.132	0.0159
Ant—mid	0.003	0.002	0.814	0.5206	0.055	0.8146	0.523	0.4723
Ant—post	0.003	0.003	4.772	0.0019^{^*}	1.089	0.3006	6.321	0.0144

			Individual			Capture success
	Mean	s.e.m.	F	P	F	P	F	P
SAR area (mV)
Posterior	1.747	0.069	4.290	0.0038	0.472	0.4946	8.185	0.0057
Middle	4.506	0.248	4.666	0.0023^{^*}	0.072	0.7897	62.206	<0.0001^{^*}
Anterior	4.452	0.344	38.657	< 0.0001^{^*}	1.099	0.2983	88.005	<0.0001^{^*}
SAR peak amplitude (mV)
Posterior	0.190	0.008	4.004	0.0058	0.120	0.7301	0.780	0.3803
Middle	0.557	0.022	6.385	0.0002^{^*}	0.065	0.7997	1.557	0.2166
Anterior	0.634	0.040	31.261	<0.0001^{^*}	0.282	0.5974	9.562	0.0029
SAR duration (s)
Posterior	0.115	0.004	6.417	0.0002^{^*}	4.947	0.0296	37.307	<0.0001^{^*}
Middle	0.106	0.004	3.228	0.0177	3.037	0.0861	64.784	<0.0001^{^*}
Anterior	0.085	0.004	2.292	0.0689	1.854	0.1781	111.174	<0.0001^{^*}
Relative duration (s)
Mid—post	0.009	0.002	2.157	0.0837	0.035	0.8527	14.820	0.0003^{^*}
Ant—mid	0.020	0.002	5.843	0.0004^{^*}	0.445	0.5069	2.300	0.1342
Ant—post	0.029	0.003	5.506	0.0007^{^*}	0.552	0.4603	20.020	<0.0001^{^*}
Relative onset (s)
Mid—post	0.009	0.001	0.390	0.8153	1.537	0.2195	35.336	<0.0001^{^*}
Ant—mid	0.008	0.001	3.197	0.0185	3.488	0.0663	43.587	<0.0001^{^*}
Ant—post	0.017	0.002	0.258	0.9038	0.061	0.8053	57.779	<0.0001^{^*}
Relative peak (s)
Mid—post	0.000	0.002	5.125	0.0012^{^*}	1.166	0.2842	6.132	0.0159
Ant—mid	0.003	0.002	0.814	0.5206	0.055	0.8146	0.523	0.4723
Ant—post	0.003	0.003	4.772	0.0019^{^*}	1.089	0.3006	6.321	0.0144

Degrees of freedom are 65 for denominator, and 4, 1 and 1 for numerator of individual, capture success and prey distance, respectively.

Ant, anterior; Mid, middle; Post, posterior.

Significant at Bonferroni-adjusted P≤0.0028, otherwise not significant.

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