Table 2.

Treatment comparisons at the lower, median and upper quartiles of stream temperature in figure 2. Odourant treatments include methanol (control), synthesized 3kPZS (5×10⁻¹³ M) and larval extract (LE; 5× 10⁻¹⁴ M PADS). Italicized p-values indicate a significant difference (two-tailed t-test, α=0.05) in upstream movement between treatments at each quartile of the temperature range (figure 2).

	methanol versus 3kPZS		3kPZS versus LE		methanol versus LE
females temperature (°C)	t19	p	t19	P	t19	p
q1 15.5	5.16	<0.001	2.61	0.017	5.96	<0.001
q2 17.9	4.59	<0.001	1.58	0.130	4.98	<0.001
q3 19.7	2.76	0.012	0.36	0.726	3.13	0.006

	methanol versus 3kPZS		3kPZS versus LE		methanol versus LE
males temperature (°C)	t3	p	t3	P	t3	P
q1 14.4	1.22	0.310	1.86	0.161	1.16	0.330
q2 15.6	0.66	0.558	0.89	0.439	0.49	0.657
q3 17.1	0.46	0.678	1.57	0.214	1.51	0.229