Table 1. Distribution of focal chicks with different numbers of heavier competitors at d15 in the two brood size treatments and in total.

Number of heavier competitors at d15	Number of focal chicks
	Low-competition treatment (brood size 2)	High-competition treatment (brood size 7)	Total
0	7 (4)	3 (2)	10 (6)
1	8 (7)	4 (3)	12 (10)
2	0	1 (1)	1 (1)
3	0	1 (1)	1 (1)
4	0	0	0
5	0	2 (1)	2 (1)
6	0	4 (3)	4 (3)
Total	15	15	30 (22)

Note: the numbers in brackets give the number of birds in the subset of the data for which telomere length measures were available.