Table 1.

Composition and mitochondrial haplotype (mtDNA Hap) of 12 social units sampled off Dominica. Social units were delineated as in Gero et al. [15]. Composition includes past and present sampled members. Well-sampled social units (those for which all adult females were genetically sampled) were used for intra-social unit analyses, and are listed in the top section of the table. The number of genetically sampled social unit members includes only those linked to a single identified individual. The number listed in parentheses counts all sampled social unit members, including samples for which individual identity was unknown. For well-sampled social units, the mean relatedness (mean r) was calculated according to Wang [62]. Members of these social units were also categorized as adult females (A_F) or offspring (O). Mother–offspring (1°) relationships were determined using Colony and ML-Relate. Second-degree (2°) relationships were determined using ML-Relate, or inferred-based shared 1° relatives.

social unit	social unit members		sex		mtDNA Hap	mean r	age class		relationships (%)
	known	sampled	F	M			AF	O	1°	2°	greater than 2°
A	12	12	9	3	BB	0.137	4	8	15.2	12.1	72.7
F	10	9	5	4	A	0.232	5	4	16.7	25.0	58.3
J	6	5	5		A	0.136	3	2	20.0	0	80.0
R	10	7	6	1	A	0.106	5	2	14.3	14.3	71.4
S	4	3	3		A	0.212	3		33.3	0	66.7
U	4	4	3	1	A	0.333	2	2	33.3	33.3	33.3
C	6	1	1		A	total	22	18	16.9	15.5	67.6
D	7	(4) 2	3	1	A
N	9	(8) 5	7	1	Aa
P	9	(3) 1	1	2	BB
T	9	(6) 4	6		A
V	12	(3) 2		3	A
total	98	(65) 55	49	16	49 A, 15 BB

^aHaplotypes for this social unit were obtained for seven of eight samples.