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Table 2.

Mean body mass, mass-specific oxygen store parameters and calculated minimum and maximum aerobic dive limits based on diving and resting metabolic rates for different size classes of free-ranging California sea lions

Mass-specific oxygen stores (ml kg-1)
Calculated aerobic dive limit
Size classNMass (kg)BloodMuscleTotalMinimumaMaximumb
5-month pup 11 20.9±1.4 9.4±0.8 11.1±0.7 28.7±1.4 1.4±0.1 3.7±0.2 
9-month pup 23.2±1.5 8.3±0.7 11.3±1.9 27.8±1.6 1.4±0.1 3.7±0.2 
Small juvenile 16 38.9±3.0 17.7±0.7 13.8±0.4 39.8±1.1 2.2±0.1 5.9±0.2 
Large juvenile 12 75.7±3.4 18.2±1.4 14.5±0.4 41.0±1.4 2.7±0.1 7.3±0.2 
Sub-adult male 16 125.2±4.2 19.5±1.1 13.8±0.5 41.5±1.2 3.1±0.1 6.4±0.2 
Adult female 37 86.7±2.1 22.3±1.0 21.0±0.5 51.5±1.1 3.4±0.1 5.2±0.1 
Adult male 31 174.6±6.2 22.5±1.0 16.5±0.2 47.3±1.1 3.8±0.1 7.9±0.2 
Mass-specific oxygen stores (ml kg-1)
Calculated aerobic dive limit
Size classNMass (kg)BloodMuscleTotalMinimumaMaximumb
5-month pup 11 20.9±1.4 9.4±0.8 11.1±0.7 28.7±1.4 1.4±0.1 3.7±0.2 
9-month pup 23.2±1.5 8.3±0.7 11.3±1.9 27.8±1.6 1.4±0.1 3.7±0.2 
Small juvenile 16 38.9±3.0 17.7±0.7 13.8±0.4 39.8±1.1 2.2±0.1 5.9±0.2 
Large juvenile 12 75.7±3.4 18.2±1.4 14.5±0.4 41.0±1.4 2.7±0.1 7.3±0.2 
Sub-adult male 16 125.2±4.2 19.5±1.1 13.8±0.5 41.5±1.2 3.1±0.1 6.4±0.2 
Adult female 37 86.7±2.1 22.3±1.0 21.0±0.5 51.5±1.1 3.4±0.1 5.2±0.1 
Adult male 31 174.6±6.2 22.5±1.0 16.5±0.2 47.3±1.1 3.8±0.1 7.9±0.2 

Values are means ± s.e.m.

Maximum and minimum calculated aerobic dive limits (cADL) were based on diving and resting metabolic rate (MR), respectively

a

Min cADL=2.22×age (months or years)–2.5533; r2=0.7006, P=0.050

b

Max cADL=0.2357×age (months or years)+1.3571; r2=0.7479, P<0.000

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