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Bigeye tuna
(Thunnus obesus)
Countable characteristics
-
D XIV~XV -13~15 + 8~9
-
A 13~15 + 8~9
-
P1 32~35
-
P2 I, 5
-
GR 26~28
Distribution
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Worldwide (except the Meditterranean Sea) / Temperate and tropical area
Maximum size
-
FL 250 cm BW 210 kg
Notes
-
Small and medium size has to be carefully identified, not to be confused with Yellowfin tuna. Check the difference here.
Size and appearence
↑ FL 26 cm
Sample collected in Malaysia
↑ FL 50 cm
Sample collected in Japan
↑ FL 100 cm
Sample collected in Japan
Example of Size (FL) and weight relationship
Following equation from Cort, L. 1986. Data on tuna fishing by Spanish vessels in western Indian Ocean. In Expert Consultation on Stock Assessment of Tunas in the Indian Ocean IPTP Coil. Vol. Work. Doc., I: 165-167.
FL (cm) | BW (kg) |
|---|---|
40 | 1.4 |
41 | 1.6 |
42 | 1.7 |
43 | 1.8 |
44 | 1.9 |
45 | 2 |
46 | 2.2 |
47 | 2.3 |
48 | 2.5 |
49 | 2.6 |
50 | 2.8 |
51 | 3 |
52 | 3.1 |
53 | 3.3 |
54 | 3.5 |
55 | 3.7 |
56 | 3.9 |
57 | 4.1 |
58 | 4.3 |
59 | 4.5 |
60 | 4.8 |
61 | 5 |
62 | 5.3 |
63 | 5.5 |
64 | 5.8 |
65 | 6 |
66 | 6.3 |
67 | 6.6 |
68 | 6.9 |
69 | 7.2 |
70 | 7.5 |
71 | 7.8 |
72 | 8.2 |
73 | 8.5 |
74 | 8.9 |
75 | 9.2 |
76 | 9.6 |
77 | 10 |
78 | 10.3 |
79 | 10.7 |
80 | 11.2 |
81 | 11.6 |
82 | 12 |
83 | 12.4 |
84 | 12.9 |
85 | 13.3 |
86 | 13.8 |
87 | 14.3 |
88 | 14.8 |
89 | 15.3 |
90 | 15.8 |
91 | 16.3 |
92 | 16.8 |
93 | 17.4 |
94 | 17.9 |
95 | 18.5 |
96 | 19.1 |
97 | 19.7 |
98 | 20.3 |
99 | 20.9 |
100 | 21.5 |
101 | 22.2 |
102 | 22.8 |
103 | 23.5 |
104 | 24.2 |
105 | 24.9 |
106 | 25.6 |
107 | 26.3 |
108 | 27 |
109 | 27.8 |
110 | 28.5 |
111 | 29.3 |
112 | 30.1 |
113 | 30.9 |
114 | 31.7 |
115 | 32.5 |
116 | 33.4 |
117 | 34.2 |
118 | 35.1 |
119 | 36 |
120 | 36.9 |
Body pattern change with time passage - Case1: FL 66cm
↑ Just after capture
Still alive
↑ 6 hours after capture
Kept in iced seawater
↑ Defrosted
Defrosted in air for 12 hours
Body pattern change with time passage - Case1: FL 63cm
↑ Just after capture
Still alive
↑ 6 hours after capture
Kept in iced seawater
↑ Defrosted
Defrosted in air for 12 hours
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