Table 1. Comparison of single light organ open/closed times for luminous and non-luminous A. katoptron.

		day*		night		feeding
		luminous	non-luminous	luminous	non-luminous	luminous	non-luminous
closed [s]	min.	0.033	0.045	0.04	0.05	0.04	0.045
	mean	5.549	9.649	0.41	0.523	0.149	0.558
	max.	198.37	92.36	8.4	6	3.12	3.28
	± SEM	0.179	0.493	0.005	0.078	0.033	0.005
open [s]	min.	0.018	0.448	0.08	0.05	0.08	0.08
	mean	0.917	0.586	0.383	0.318	1.602	0.332
	max.	17.88	7.6	5.68	2.8	36,32	2.24
	± SEM	0.018	0.023	0.003	0.003	0.009	0.025

min., minimum time; max., maximum time; mean, mean value; SEM, standard error of the mean

*synopsis of 3 light levels (dl i1-dl i3)