610 
Fishery Bulletin 99(4) 
Table 6 
Incidence of melanophores embedded in the lateral muscle and on the myosepta (%) in Thunnus thynnus. Each melanophore is recorded 
on the first to nineth myomeres. 
Myomere 
Size range 
(BL; mm) 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
3.50-3.99 
4.00-4.49 
4 
4.50-4.99 
4 
4 
4 
7 
4 
4 
4 
4 
4 
7 
5.00-5.49 
8 
8 
8 
5.50-5.99 
10 
10 
6.00-6.49 
10 
10 
10 
10 
10 
6.50-6.99 
7.00-7.49 
10 
10 
10 
10 
20 
10 
10 
10 
7.50-7.99 
10 
10 
10 
10 
8.00-8.49 
8 
8 
8 
8 
8 
8 
8 
8 
15 
23 
31 
15 
8.50-8.99 
8 
0 
8 
8 
0 
0 
15 
31 
38 
46 
54 
62 
9.00-9.49 
8 
8 
8 
8 
25 
33 
33 
42 
50 
50 
50 
58 
9.50-9.99 
10 
10 
10 
10 
30 
40 
40 
50 
60 
60 
60 
70 
Table 7 
Incidence of melanophores on the dorsal fin base (%) in Thunnus thynnus. Each melanophore is recorded for the nearest myomere, 
for larvae <7.50 mm BL. 
Myomere 
Size range 
(BL; mm) 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
7.50-7.99 
10 
10 
10 
10 
10 
20 
20 
20 
30 
20 
30 
20 
30 
20 
20 
20 
20 
10 
8.00-8.49 
8 
8 
8 
8 
8 
15 
15 
15 
23 
15 
23 
15 
23 
15 
15 
15 
15 
8 
8.50-8.99 
8 
15 
31 
46 
46 
46 
46 
46 
54 
38 
54 
31 
31 
31 
31 
46 
46 
9.00-9.49 
8 
17 
25 
50 
58 
83 
83 
83 
83 
83 
83 
83 
83 
83 
83 
83 
83 
83 
9.50-9.99 
20 
40 
70 
80 
100 
60 
60 
60 
60 
100 
100 
100 
100 
100 
90 
100 
100 
Table 8 
Incidence of melanophores on the anal fin base (%) in Thunnus thynnus. Each melanophore is recorded for the nearest myomere. 
n indicates the number of specimens examined at each size range. Melanophores were not observed on the first to twenty-first 
myomeres and for larvae <7.0 mm BL. 
Myomere 
Size range 
(BL; mm) 
22 
23 
24 
25 
26 
27 
28 
29 
30 
31 
32 
33 
34 
35 
36 
37 
38 
39 
n 
7.00-7.49 
10 
10 
20 
10 
20 
20 
20 
10 
10 
10 
10 
10 
10 
7.50-7.99 
10 
20 
30 
30 
50 
40 
60 
40 
40 
40 
40 
20 
30 
20 
20 
20 
10 
10 
8.00-8.49 
15 
8 
15 
31 
38 
31 
62 
69 
54 
62 
62 
46 
31 
15 
13 
8.50-8.99 
8 
8 
8 
8 
31 
31 
38 
62 
69 
69 
69 
69 
69 
62 
62 
38 
23 
13 
9.00-9.49 
17 
33 
42 
58 
75 
83 
83 
75 
67 
67 
50 
42 
33 
25 
12 
9.50-9.99 
20 
40 
50 
70 
90 
100 
100 
90 
80 
80 
60 
50 
40 
30 
10 
