Shared Reproductive State Enhances Female Associations in Dolphins
Table 1
Social cluster membership (from [8]). Reproductive state and number of sightings of female Indo-Pacific bottlenose dolphins, including an individual's highest association
and its closest associate.
Female
ID
Social
cluster
Reproductive
state
Number of
sightings
Highest
association
Closest
associate ID
1
W
1 yr
11
0.43
36
3
N
1 yr
17
0.33
83
4
N
1 yr, new 2
11
0.55
42
6
W
New 1
15
0.38
52
10
W
New 1
22
0.42
11
11
W
1 yr
16
0.55
18
17
N
1 yr
9
0.44
4
18
W
1 yr
20
0.74
45
20
S
1 yr
19
0.81
54
21
S
1 yr
17
0.62
20
22
1 yr
13
0.36
20
29
S
No calf
6
0.40
20
36
W
No calf
13
0.48
52
39
1 yr
6
0.24
42
42
N
No calf, new 2
15
0.55
4
45
W
No calf
12
0.74
18
52
W
1 yr
16
0.48
36
54
S
1 yr
18
0.81
20
61
K
New 1
7
0.77
66
62
K
1 yr
6
0.67
66
63
K
No calf, new 2
14
0.74
68
64
K
1 yr, new 2
6
0.67
61
65
K
New 1
9
0.60
63
66
K
New 1
6
0.77
61
67
K
1 yr
8
0.67
61
68
K
No calf, new 2
10
0.74
63
71
K
1 yr
9
0.62
64
73
S
1 yr
11
0.30
110
75
N
1 yr
11
0.40
4
79
S
No calf
8
0.29
21
83
N
No calf
11
0.33
3
87
S
No calf
6
0.47
54
110
S
1 yr
13
0.55
54
124
S
1 yr
6
0.25
110
132
K
No calf
7
0.62
62 and 66
Reproductive state refers to estimated age
or absence of calf at the beginning of the study, and summer of parturition thereafter.
New 1 and new 2 refer to newborn in summers 1 and 2, respectively. Females with
no cluster membership could
not be unambiguously classified as member of any particular main cluster.
