Table 1.

Mixed effects survival models used to investigate relationships between attack rates and temperature, body size and date. (Body size class was included as a fixed factor, temperature and date as covariates and individual (ind) as a random factor. A separate model was developed with temperature described by two linear regression lines and a break point. Late season experiments were carried out between 15 October and 2 December.)

full model	best model	estimate ± s.e.	z-value	p-value	N	AICc for full model	AICc for best model
all experiments
ind, temp, temp2, date, date2, size class	temp	0.64 ± 0.16	4.1	<0.0001	83	464.5	458.1
	temp2	−0.017 ± 0.005	3.2	<0.005
	temp < breakpoint	0.99 ± 0.23	3.8	<0.0005	83		448.1
	temp > breakpoint	0.10 ± 0.038	2.7	<0.01
	breakpoint	11.0°C
late season experiments
ind, temp, temp2, date, date2, size class	temp	1.91 ± 0.62	3.1	<0.005	45	81.3	77.3
	temp2	−0.068 ± 0.026	2.5	<0.05
	date	−0.050 ± 0.021	2.4	<0.05