Ants Can Expect the Time of an Event on Basis of Previous Experiences

Table 2

Same legend as for Table 1, except that the experiment was made on two colonies of M. rubra and two colonies of M. sabuleti.

Days, food delivery times, and counting times ()	M. rubra colonies		Mean	M. sabuleti colonies		Mean
	A	B		A	B
Control 1, no food
	10	5	7.5	2	0	1.0
= + 20′	8	5	6.5	4	2	3.0
= + 40′	8	0	4.0	2	2	2.0
= + 60′	10	0	5.0	2	2	2.0
= + 80′	20	0	10.0	3	3	3.0
Control 2, food present
	26	10	18.0	10	5	7.5
= + 20′	20	10	15.0	10	5	7.5
= + 40′	20	10	15.0	10	10	10.0
= + 60′	20	10	15.0	10	5	7.5
= + 80′	20	10	15.0	0	10	5.0
Day 1, food given at and retrieved at the end of
	17	6	11.5	15	5	10.0
= + 20′	30	6	18.0	10	5	7.5
= + 40′	18	3	10.5	7	12	9.5
= + 60′	10	3	6.5	8	0	4.0
= + 80′	10	0	5.0	0	10	5.0
Day 2, food given at and retrieved at the end of
	9	0	4.5	5	6	6.5
= + 20′	24	16	20.0	21	15	18.0
= + 40′	11	0	10.5	8	8	8.0
= + 60′	10	0	5.0	5	5	5.0
= + 80′	11	8	9.5	0	8	4.0
Day 3, food given at and retrieved at the end of
	10	10	10.0	0	10	5.0
= + 20′	3	11	7.0	7	4	5.5
= + 40′	33	14	23.5	24	20	22.0
= + 60′	15	13	14.0	3	3	3.0
= + 80′	10	2	6.0	3	2	2.5
Day 4, food given at and retrieved at the end of
	18	0	9.0	4	3	3.5
= + 20′	4	10	7.0	5	3	4.0
= + 40′	9	6	7.5	8	8	8.0
= + 60′	30	22	26.0	22	34	28.0
= + 80′	10	10	10.0	10	14	12.0
Day 5, food given at and retrieved at the end of
	9	0	4.5	7	2	4.5
= + 20′	4	4	4.0	5	0	2.5
= + 40′	7	4	5.5	6	4	5.0
= + 60′	8	6	7.0	8	8	8.0
= + 80′	34	20	27.0	34	28	31.0