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Table 2.

Southern bluefin tuna parameters

Trial
1234Mean (N=4 or 6)
Mb (kg) 9.4±1.6 9.9±0.9  11±1.3  11±1.4 10±0.4 
BL (cm) 81±5 83±2  88±3  86±2 84±1.6 
T (°C) 19.7–20.1 20.1–20.3  19.1–19.7  18.2–18.5 19.3±0.4 
Ur (BL s-10.71 1.4  0.78  0.83 0.92±0.15 
RMR (mg kg-1 h-1300 456  355  354 366±32.5 
Feed trials 1
 
1
 
2
 
1
 
2
 
1
 
 
Ration (%Mb5.7 6.0 8.5 2.1 6.8 4.1 5.5±0.9 
IE (mJ) 8.96 10.0 14.1 3.70 12.1 7.73 9.48±1.48 
Usda (BL s-10.87 2.0 2.6 0.80 1.7 1.4 1.6±0.9 
Usda duration (h) 26 38 45+ 20 45+ 24+ 33±4.5 
Peak (mg kg-1 h-1728 1240 1290 469 840 669 872±133 
Factorial scope 2.4 2.7 2.8 1.3 2.3 1.9 2.2±0.23 
Duration (h) 24 23 42 27 45+ 25 31±4.0 
Magnitude (kJ kg-199.2 130 192 30.7 148 74.9 112±23.2 
Coefficient (%) 31 38 40 26 39 33 35±2.2 
Trial
1234Mean (N=4 or 6)
Mb (kg) 9.4±1.6 9.9±0.9  11±1.3  11±1.4 10±0.4 
BL (cm) 81±5 83±2  88±3  86±2 84±1.6 
T (°C) 19.7–20.1 20.1–20.3  19.1–19.7  18.2–18.5 19.3±0.4 
Ur (BL s-10.71 1.4  0.78  0.83 0.92±0.15 
RMR (mg kg-1 h-1300 456  355  354 366±32.5 
Feed trials 1
 
1
 
2
 
1
 
2
 
1
 
 
Ration (%Mb5.7 6.0 8.5 2.1 6.8 4.1 5.5±0.9 
IE (mJ) 8.96 10.0 14.1 3.70 12.1 7.73 9.48±1.48 
Usda (BL s-10.87 2.0 2.6 0.80 1.7 1.4 1.6±0.9 
Usda duration (h) 26 38 45+ 20 45+ 24+ 33±4.5 
Peak (mg kg-1 h-1728 1240 1290 469 840 669 872±133 
Factorial scope 2.4 2.7 2.8 1.3 2.3 1.9 2.2±0.23 
Duration (h) 24 23 42 27 45+ 25 31±4.0 
Magnitude (kJ kg-199.2 130 192 30.7 148 74.9 112±23.2 
Coefficient (%) 31 38 40 26 39 33 35±2.2 

Mb, body mass; BL, body length; T,water temperature; Ur, routine swimming velocity; RMR,calculated routine metabolic rate; IE, total ingested energy; Usda, mean swimming velocity during the SDA period; Usda duration, duration of elevated post-prandial swimming velocity

Values are means ± s.e.m. for the three fish used in each trial

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