The Company of Biologists

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)
Size class	N	Mass (kg)	Blood	Muscle	Total	Minimum^{^a}	Maximum^{^b}
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	9	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)
Size class	N	Mass (kg)	Blood	Muscle	Total	Minimum^{^a}	Maximum^{^b}
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	9	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

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

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

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